From 5b32ee9eae3e79b1e1411596bb9ffd0933fb1f39 Mon Sep 17 00:00:00 2001
From: Kizarm <mrazik@volny.cz>
Date: Mon, 21 Oct 2024 10:26:41 +0200
Subject: [PATCH] add scope

---
 .gitignore                                |   8 +
 V203/usb/ch32v203/adcscope.cpp            | 166 +++++++++++++
 V203/usb/common/adcscope.h                |  46 ++++
 V203/usb/scope/firmware/Makefile          |  52 ++++
 V203/usb/scope/firmware/ch32v203          |   1 +
 V203/usb/scope/firmware/common            |   1 +
 V203/usb/scope/firmware/hack.c            |  21 ++
 V203/usb/scope/firmware/main.cpp          |  29 +++
 V203/usb/scope/firmware/main.h            |   8 +
 V203/usb/scope/firmware/samplering.cpp    | 182 ++++++++++++++
 V203/usb/scope/firmware/samplering.h      |  50 ++++
 V203/usb/scope/firmware/structures.h      |  88 +++++++
 V203/usb/scope/firmware/usb_desc.cpp      |  83 +++++++
 V203/usb/scope/firmware/usb_desc.h        |  66 ++++++
 V203/usb/scope/software/datasource.cpp    | 177 ++++++++++++++
 V203/usb/scope/software/datasource.h      |  52 ++++
 V203/usb/scope/software/displaywidget.cpp | 277 ++++++++++++++++++++++
 V203/usb/scope/software/displaywidget.h   |  58 +++++
 V203/usb/scope/software/helpers.cpp       |  47 ++++
 V203/usb/scope/software/helpers.h         |   8 +
 V203/usb/scope/software/ico.png           | Bin 0 -> 1545 bytes
 V203/usb/scope/software/main.cpp          |   9 +
 V203/usb/scope/software/main.h            |  11 +
 V203/usb/scope/software/mainwindow.cpp    | 151 ++++++++++++
 V203/usb/scope/software/mainwindow.h      |  33 +++
 V203/usb/scope/software/mainwindow.ui     | 238 +++++++++++++++++++
 V203/usb/scope/software/src.pro           |  41 ++++
 V203/usb/scope/software/src.qrc           |   8 +
 V203/usb/scope/software/structures.h      |   1 +
 V203/usb/scope/software/time.png          | Bin 0 -> 606 bytes
 V203/usb/scope/software/volt.png          | Bin 0 -> 595 bytes
 31 files changed, 1912 insertions(+)
 create mode 100644 V203/usb/ch32v203/adcscope.cpp
 create mode 100644 V203/usb/common/adcscope.h
 create mode 100644 V203/usb/scope/firmware/Makefile
 create mode 120000 V203/usb/scope/firmware/ch32v203
 create mode 120000 V203/usb/scope/firmware/common
 create mode 100644 V203/usb/scope/firmware/hack.c
 create mode 100644 V203/usb/scope/firmware/main.cpp
 create mode 100644 V203/usb/scope/firmware/main.h
 create mode 100644 V203/usb/scope/firmware/samplering.cpp
 create mode 100644 V203/usb/scope/firmware/samplering.h
 create mode 100644 V203/usb/scope/firmware/structures.h
 create mode 100644 V203/usb/scope/firmware/usb_desc.cpp
 create mode 100644 V203/usb/scope/firmware/usb_desc.h
 create mode 100644 V203/usb/scope/software/datasource.cpp
 create mode 100644 V203/usb/scope/software/datasource.h
 create mode 100644 V203/usb/scope/software/displaywidget.cpp
 create mode 100644 V203/usb/scope/software/displaywidget.h
 create mode 100644 V203/usb/scope/software/helpers.cpp
 create mode 100644 V203/usb/scope/software/helpers.h
 create mode 100644 V203/usb/scope/software/ico.png
 create mode 100644 V203/usb/scope/software/main.cpp
 create mode 100644 V203/usb/scope/software/main.h
 create mode 100644 V203/usb/scope/software/mainwindow.cpp
 create mode 100644 V203/usb/scope/software/mainwindow.h
 create mode 100644 V203/usb/scope/software/mainwindow.ui
 create mode 100644 V203/usb/scope/software/src.pro
 create mode 100644 V203/usb/scope/software/src.qrc
 create mode 120000 V203/usb/scope/software/structures.h
 create mode 100644 V203/usb/scope/software/time.png
 create mode 100644 V203/usb/scope/software/volt.png

diff --git a/.gitignore b/.gitignore
index 8df9f6c..29d07b9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,11 @@
 V203/pwm/sin.c
 V203/gsm/lib/libgsm.a
 V203/usb/cdc/mystrings.inc
+V203/usb/scope/bin/*
+V203/usb/scope/software/.qmake.stash
+V203/usb/scope/software/Makefile
+V203/usb/scope/software/moc/*
+V203/usb/scope/software/obj/*
+V203/usb/scope/software/qrc_src.cpp
+V203/usb/scope/software/ui_mainwindow.h
+
diff --git a/V203/usb/ch32v203/adcscope.cpp b/V203/usb/ch32v203/adcscope.cpp
new file mode 100644
index 0000000..1d39650
--- /dev/null
+++ b/V203/usb/ch32v203/adcscope.cpp
@@ -0,0 +1,166 @@
+#include "system.h"
+#include "adcscope.h"
+#include "structures.h"
+
+static AdcClass * AdcClassInstance = nullptr;
+enum TRANSFER_SIZES {
+  XFER_BYTE = 0,
+  XFER_HALF,
+  XFER_WORD,
+};
+static const unsigned DmaLenTable [] = {
+  DATA_FULL_LEN * ADC_MAXCHANNELS, ADC_MAXCHANNELS * 2,
+};
+static constexpr unsigned LSH = 2u, DIVL = 36u, DIVH = 36'000u;
+static const TimeBaseDescriptor BaseTable [] {
+  {(2u    << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 2us
+  {(5u    << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 5us
+  {(10u   << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 10us
+  {(20u   << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 20us
+  {(50u   << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 50us
+  {(100u  << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 100us
+  {(200u  << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 200us
+  {(500u  << LSH) - 1u, DIVL - 1u, TIME_BASE_TRIGERED},  // 500us
+
+  {(1000u << LSH) - 1u, DIVL - 1u, TIME_BASE_CONTINUOUS},  // 1ms
+  {(2u    << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 2ms
+  {(5u    << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 5ms
+  {(10u   << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 10ms
+  {(20u   << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 20ms
+  {(50u   << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 50ms
+  {(100u  << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 100ms
+  {(200u  << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 200ms
+
+  {(500u  << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 500ms
+  {(1000u << LSH) - 1u, DIVH - 1u, TIME_BASE_CONTINUOUS},  // 1s
+};
+static inline void EnableClock (void) noexcept {
+  // Enable DMA
+  RCC.AHBPCENR.modify([](RCC_Type::AHBPCENR_DEF & r) -> auto {
+    r.B.SRAMEN = SET;
+    r.B.DMA1EN = SET;
+    return r.R;
+  });
+  // Enable ADC + GPIOC
+  RCC.APB2PCENR.modify([](RCC_Type::APB2PCENR_DEF & r) -> auto {
+    r.B.ADC1EN = SET;
+    r.B.IOPAEN = SET;
+    return r.R;
+  });
+  RCC.APB1PCENR.B.TIM3EN = SET; // Enable TIM3
+  RCC.CFGR0.B.ADCPRE     = 3u;  // PCLK2 divided by 8 as ADC clock (18 MHz, ! pretaktovano 14 MHz max).
+  //  PIN PA2 / A2
+  GPIOA.CFGLR.modify([](GPIOA_Type::CFGLR_DEF & r) -> auto {
+    r.B.MODE2 = 0u;
+    r.B.CNF2  = 0u;
+    return r.R;
+  });
+}
+static inline void Timer3Init (const TimeBaseDescriptor & tb) noexcept {
+  TIM3.PSC.R    = tb.presc;          // 4 MHz Fs
+  TIM3.ATRLR.R  = tb.divider;
+  // TRGO update for ADC
+  TIM3.CTLR2.B.MMS = 2u;
+}
+static inline void AdcCalibrate (void) noexcept {
+  // RESET
+  RCC.APB2PRSTR.B.ADC1RST = SET;
+  RCC.APB2PRSTR.B.ADC1RST = RESET;  
+  // set channels
+  ADC1.RSQR3__CHANNEL.B.SQ1__CHSEL  = 2u;      // CH2
+  ADC1.RSQR3__CHANNEL.B.SQ2         = 3u;      // CH3
+  ADC1.RSQR1.B.L      = ADC_MAXCHANNELS - 1U;  // 2 regular conversion
+  static constexpr unsigned ts = 0u;
+  ADC1.SAMPTR2_CHARGE2.B.SMP2_TKCG2 = ts;
+  ADC1.SAMPTR2_CHARGE2.B.SMP3_TKCG3 = ts;
+  ADC1.CTLR1.B.SCAN   = SET;
+  
+  ADC1.CTLR2.B.ADON   = SET;
+  ADC1.CTLR2.B.RSTCAL = SET;             // Launch the calibration by setting RSTCAL
+  while (ADC1.CTLR2.B.RSTCAL != RESET);  // Wait until RSTCAL=0
+  ADC1.CTLR2.B.CAL    = SET;             // Launch the calibration by setting CAL
+  while (ADC1.CTLR2.B.CAL    != RESET);  // Wait until CAL=0  
+}
+typedef __SIZE_TYPE__ size_t;
+static inline void Dma1Ch1Init (const void * ptr, const unsigned n = 0u) noexcept {
+  // Configure the peripheral data register address
+  DMA1.PADDR1.R = reinterpret_cast<size_t> (& ADC1.RDATAR_DR_ACT_DCG);
+  // Configure the memory address
+  DMA1.MADDR1.R = reinterpret_cast<size_t> (ptr);
+  // Configure the number of DMA tranfer to be performs on DMA channel 1
+  DMA1.CNTR1 .R = DmaLenTable [n]; // DATA_FULL_LEN * ADC_MAXCHANNELS;
+  // Configure increment, size, interrupts and circular mode
+  DMA1.CFGR1.modify([] (DMA1_Type::CFGR1_DEF & r) -> auto {
+    r.B.PL      = 3u;       // highest priority
+    r.B.MEM2MEM = RESET;    // periferal -> memory
+    r.B.MINC    = SET;      // memory increment
+    r.B.MSIZE   = XFER_HALF;// 16-bit
+    r.B.PSIZE   = XFER_HALF;// 16-bit
+    r.B.HTIE    = SET;      // INT Enable HALF
+    r.B.TCIE    = SET;      // INT Enable FULL
+    r.B.CIRC    = SET;      // Circular MODE
+    // Enable DMA Channel 1
+    r.B.EN    = SET;
+    return r.R;
+  });  
+}
+static inline void AdcPostInit (void) noexcept {
+  ADC1.CTLR2.modify([](ADC1_Type::CTLR2_DEF & r) -> auto {
+    r.B.DMA     = SET;
+    r.B.EXTTRIG = SET;
+    r.B.EXTSEL  = 4u;       // TRGO event of timer 3
+    r.B.SWSTART = SET;
+    return r.R;
+  });
+}
+/* *********************************************************************************************/
+void AdcClass::Init () {
+  AdcClassInstance = this;
+  EnableClock ();
+  Timer3Init  (BaseTable [6]);
+  NVIC.EnableIRQ (DMA1_Channel1_IRQn);
+  AdcCalibrate();
+  Dma1Ch1Init (buffer);
+  AdcPostInit ();
+  // start timer
+  TIM3.CTLR1.B.CEN = SET;
+}
+// nekonzistentni, ale funkcni
+void SampleRing::ReloadTimer(const unsigned int n) {
+  const TimeBaseDescriptor & tb = BaseTable [n];
+  TIM3.CTLR1.B.CEN = RESET;
+  TIM3.CNT.R       = 0u;
+  TIM3.PSC.R       = tb.presc;
+  TIM3.ATRLR.R     = tb.divider;
+  TIM3.CTLR1.B.CEN = SET;
+  if (tb.mode != m_mode) {
+    if (!AdcClassInstance) return;
+    const DATA_BLOCK * buffer = AdcClassInstance->setPtrH (tb.mode);
+    DMA1.CFGR1.B.EN = RESET;
+    NVIC.DisableIRQ (DMA1_Channel1_IRQn);
+    Dma1Ch1Init (buffer, tb.mode);
+    // m_head = m_tail = m_lenght = 0u;
+    m_mode = tb.mode;
+    NVIC.EnableIRQ  (DMA1_Channel1_IRQn);
+  }
+}
+
+/* *********************************************************************************************/
+
+void AdcClass::drq() {
+  led << false;
+  DMA1_Type::INTFR_DEF state (DMA1.INTFR);
+  DMA1.INTFCR.R = state.R;  // clear all
+  if        (state.B.HTIF1 != RESET) {
+    ring.write (ptrl);
+  } else if (state.B.TCIF1 != RESET) {
+    ring.write (ptrh);
+  }
+  led << true;
+}
+extern "C" {
+  [[gnu::interrupt]] extern void DMA1_Channel1_IRQHandler();
+}
+void DMA1_Channel1_IRQHandler( void ) {
+  if (AdcClassInstance) AdcClassInstance->drq();
+}
diff --git a/V203/usb/common/adcscope.h b/V203/usb/common/adcscope.h
new file mode 100644
index 0000000..898b889
--- /dev/null
+++ b/V203/usb/common/adcscope.h
@@ -0,0 +1,46 @@
+#ifndef ADCCLASS_SCOPE_H
+#define ADCCLASS_SCOPE_H
+#include <stdint.h>
+#include "samplering.h"
+#include "gpio.h"
+
+/** @file
+ *  @brief A/D převodník.
+ * */
+
+/**
+ * @class AdcClass
+ * @brief A/D převodník. 
+ * 
+ * Výhradně pro projekt osciloskopu.
+ * Původně to bylo pro STM32L452, ale v podstatě je to stejné pro CH32V203.
+ * Tedy deklarace třídy, nikoli její definice.
+ * */
+
+class AdcClass {
+  public:
+    AdcClass(SampleRing & r) : ring(r), led(GPIOA, 1), ptrl (buffer), ptrh (buffer + DATA_HALF_LEN) {
+    };
+    /**
+     * @brief Inicializace ADC.
+     * 
+     * Včetně vstupů.
+     * 
+     */
+    void     Init    ();
+    DATA_BLOCK * setPtrH    (const int n) {
+      if (n) { ptrh = buffer + 1;
+      } else { ptrh = buffer + DATA_HALF_LEN; }
+      return buffer;
+    }
+  public: // UNUSABLE
+    void drq ();                        //!< obsluha přerušení, interní metoda, ale musí mít public atribut
+  private:
+    SampleRing & ring;
+    GpioClass    led;
+    DATA_BLOCK * ptrl;
+    DATA_BLOCK * ptrh;
+    [[gnu::aligned(4)]]DATA_BLOCK   buffer [DATA_FULL_LEN];  //!< data
+};
+
+#endif // ADCCLASS_SCOPE_H
diff --git a/V203/usb/scope/firmware/Makefile b/V203/usb/scope/firmware/Makefile
new file mode 100644
index 0000000..81cc043
--- /dev/null
+++ b/V203/usb/scope/firmware/Makefile
@@ -0,0 +1,52 @@
+TARGET?= ch32v203
+TOOL  ?= gcc
+#TOOL  ?= clang
+
+PRJ    = example
+
+VPATH  = . ./$(TARGET) ./common
+BLD    = ./build/
+DFLAGS = -d
+LFLAGS = -g
+LDLIBS =
+BFLAGS = --strip-unneeded
+
+CFLAGS = -MMD -Wall -Wno-parentheses -ggdb -fno-exceptions -ffunction-sections -fdata-sections
+CFLAGS+= -I. -I./$(TARGET) -I./common
+DEL    = rm -f
+
+# zdrojaky
+OBJS   = main.o hack.o
+OBJS  += usb_desc.o cdc_class.o adcscope.o samplering.o
+
+include $(TARGET)/$(TOOL).mk
+BOBJS = $(addprefix $(BLD),$(OBJS))
+
+all: $(BLD) $(PRJ).elf
+# ... atd.
+-include $(BLD)*.d
+# linker
+$(PRJ).elf: $(BOBJS)
+	-@echo [LD $(TOOL),$(TARGET)] $@
+	@$(LD) $(LFLAGS) -o $(PRJ).elf $(BOBJS) $(LDLIBS)
+	-@echo "size:"
+	@$(SIZE) $(PRJ).elf
+	-@echo "listing:"
+	$(DUMP) $(DFLAGS) $(PRJ).elf > $(PRJ).lst
+	-@echo "OK."
+	$(COPY) $(BFLAGS) -O binary $(PRJ).elf $(PRJ).bin
+# preloz co je potreba
+$(BLD)%.o: %.c
+	-@echo [CC $(TOOL),$(TARGET)] $@
+	@$(CC) -std=gnu99 -c $(CFLAGS) $< -o $@
+$(BLD)%.o: %.cpp
+	-@echo [CX $(TOOL),$(TARGET)] $@
+	@$(CXX) -std=c++17 -fno-rtti -c $(CFLAGS) $< -o $@
+$(BLD):
+	mkdir $(BLD)
+flash: $(PRJ).elf
+	minichlink -w $(PRJ).bin flash -b
+# vycisti
+clean:
+	$(DEL) $(BLD)* *.lst *.bin *.elf *.map *~
+.PHONY: all clean flash run
diff --git a/V203/usb/scope/firmware/ch32v203 b/V203/usb/scope/firmware/ch32v203
new file mode 120000
index 0000000..41e3e87
--- /dev/null
+++ b/V203/usb/scope/firmware/ch32v203
@@ -0,0 +1 @@
+../../ch32v203/
\ No newline at end of file
diff --git a/V203/usb/scope/firmware/common b/V203/usb/scope/firmware/common
new file mode 120000
index 0000000..248927d
--- /dev/null
+++ b/V203/usb/scope/firmware/common
@@ -0,0 +1 @@
+../../common/
\ No newline at end of file
diff --git a/V203/usb/scope/firmware/hack.c b/V203/usb/scope/firmware/hack.c
new file mode 100644
index 0000000..391b7bf
--- /dev/null
+++ b/V203/usb/scope/firmware/hack.c
@@ -0,0 +1,21 @@
+#include <stdint.h>
+#include <stdarg.h>
+typedef __SIZE_TYPE__ size_t;
+size_t strlen (const char *s) {
+  size_t l = 0;
+  while (*s++) l++;
+  return l;
+}
+void *memcpy (void *dest, const void *src, size_t n) {
+  const char *s = (const char *) src;
+  char *d = (char *) dest;
+  int i;
+  for (i=0; i<n; i++) d[i] = s[i];
+  return dest;
+}
+void *memset (void *s, int c, size_t n) {
+  char *p = (char *) s;
+  int i;
+  for (i=0; i<n; i++) p[i] = c;
+  return s;
+}
diff --git a/V203/usb/scope/firmware/main.cpp b/V203/usb/scope/firmware/main.cpp
new file mode 100644
index 0000000..d35a52c
--- /dev/null
+++ b/V203/usb/scope/firmware/main.cpp
@@ -0,0 +1,29 @@
+#include "main.h"
+/** USB osciloskop.
+ * Původně to byl projekt pro STM32L452, ale i na CH32V203 to celkem funguje.
+ * AD převodník zde je pomalejší, pro 1 kanál snese max 1 Mbps, zde 2 kanály,
+ * tedy 500kbps max, s tím, že doba vzorkování je ta nejmenší, tedy vstupy se
+ * musí krmit z co nejmenší impedance (výstup externího OZ). Dál nejde omezit
+ * počet bitů na 10, musí zůstat 12.
+ * Komunikace po USB CDC je v hexadecimálním formátu - písmenka lze snadno
+ * číst a propustnost celkem vyhovuje - data 2*12 bitů zaberou 6 bytů, celkem
+ * nic by se stejně neušetřilo, binárně by se předávaly stejně 4 byty.
+ * Je zde aplikován trigger, zhruba jako normálního osciloskopu, nastavuje se
+ * povely po USB, stejně jako časová základna. Formát povelů je patrný ze
+ * zdrojáků.
+ * Bylo jen potřeba dopsat kontinuální běh pro časy vzorkování větší než 1ms.
+ * Zobrazování má za úkol aplikace v Qt5 v adresáři software.
+ * */
+static SampleRing ring;
+static AdcClass   adc (ring);
+static cdc_class  cdc;
+
+int main () {
+  cdc.init();
+  adc.Init();
+  ring += cdc;
+  for (;;) {
+    ring.pass ();
+  }
+  return 0;
+}
diff --git a/V203/usb/scope/firmware/main.h b/V203/usb/scope/firmware/main.h
new file mode 100644
index 0000000..4172b6e
--- /dev/null
+++ b/V203/usb/scope/firmware/main.h
@@ -0,0 +1,8 @@
+#ifndef MAIN_H
+#define MAIN_H
+
+#include "adcscope.h"
+#include "cdc_class.h"
+#include "samplering.h"
+
+#endif // MAIN_H
diff --git a/V203/usb/scope/firmware/samplering.cpp b/V203/usb/scope/firmware/samplering.cpp
new file mode 100644
index 0000000..490490a
--- /dev/null
+++ b/V203/usb/scope/firmware/samplering.cpp
@@ -0,0 +1,182 @@
+#include "samplering.h"
+
+static const char * const hexstr = "0123456789ABCDEF";
+
+uint32_t SampleRing::Up (const char * data, const uint32_t len) {
+  for (unsigned n=0; n<len; n++) {
+    const char c = data [n];
+    switch (c) {
+      case '$':
+        rcvd_counter = 0;
+        rcvd_status  = RCVD_DATA;
+        break;
+      case '\r':
+      case '\n':
+        CmdReceived ();
+        rcvd_counter = 0;
+        rcvd_status  = RCVD_IDLE;
+        break;
+      default:
+        if (rcvd_status == RCVD_DATA) {
+          rcvd_buffer [rcvd_counter] = c;
+          rcvd_counter += 1u;
+        }
+        break;
+    }
+  }
+  return len;
+}
+void SampleRing::CmdReceived() {
+  if (rcvd_counter == 0u) return;
+  unsigned result = 0u;
+  for (unsigned n=0; n<rcvd_counter; n++) {
+    const char c = rcvd_buffer [n];
+    result *= 16;
+    if ((c >= '0') and (c <= '9')) {
+      result += (unsigned) (c - '0');
+    } else if ((c >= 'A') and (c <= 'F')) {
+      result += (unsigned) (c - 'A' + 10);
+    } else if ((c >= 'a') and (c <= 'f')) {
+      result += (unsigned) (c - 'a' + 10);
+    } else {
+      // chyba : nech byt
+    }
+  }
+  CommandPass (result);
+}
+void SampleRing::CommandPass(const unsigned int cmd) {
+  RcvdHeader header;
+  header.common = cmd & 0xFFFF;
+  const DESTINATION dest = static_cast<DESTINATION> (header.bits.destinat);
+  switch (dest) {
+    case DEST_CHA:
+    case DEST_CHB:
+      break;
+    case DEST_BASE:
+      ReloadTimer (header.bits.cmd_value);
+      break;
+    case DEST_TRIG: {
+      const TRIGGER_CMD command = static_cast<TRIGGER_CMD> (header.bits.cmd_type);
+      switch (command) {
+        case TRIGGER_CMD_OFSET: m_settings.offset = header.bits.cmd_value; break;
+        case TRIGGER_CMD_VALUE: m_settings.value  = header.bits.cmd_value; break;
+        case TRIGGER_CMD_MODE: {
+          TriggerModeUnion new_mode_union;
+          new_mode_union.common = header.bits.cmd_value;
+          const TRIGER_MODE  new_mode    = static_cast<TRIGER_MODE> (new_mode_union.bits.mode);
+          if (m_settings.mode    != new_mode)    m_settings.mode    = new_mode;
+          const ADC_CHANNELS new_channel = static_cast<ADC_CHANNELS>(new_mode_union.bits.channel);
+          if (m_settings.channel != new_channel) m_settings.channel = new_channel;
+          const bool         new_rising  = new_mode_union.bits.rissing ? true : false;
+          if (m_settings.rising  != new_rising)  m_settings.rising  = new_rising;
+        } break;
+      }
+    } break;
+  }
+}
+
+void SampleRing::write(DATA_BLOCK const * data) {
+  if (m_finished) return;
+  unsigned t_head   = m_head;   // dočasné proměnné kvůli zrychlení
+  unsigned t_lenght = m_lenght; // následujícího cyklu
+  if (m_mode == TIME_BASE_TRIGERED) {
+    for (unsigned n=0u; n<DATA_HALF_LEN; n++) {
+      const DATA_BLOCK & sample = data [n];
+      ring_buffer [t_head].common_data = sample.common_data;
+      t_head   += 1u;
+      t_head   &= RING_MSK;
+      t_lenght += 1u;
+      const bool compare = m_settings.rising != (sample.channels[m_settings.channel] > m_settings.value);
+      if (compare and m_old_triger and !m_trigered) {   // TRIGERED
+        if (t_lenght >= m_settings.offset) {
+          t_lenght    = m_settings.offset;
+          m_trigered  = true;
+        }
+      }
+      m_old_triger  = !compare;
+      if (t_lenght >= RING_LEN) {
+        // zastavit odesílání dat, pokud není AUTO a není splněna podmínka trigeru
+        if ((m_settings.mode != TRIGER_MODE_AUTO) and !m_trigered) continue;
+        t_lenght    = RING_LEN;
+        m_tail      = t_head;
+        m_finished  = true;
+        break;
+      }
+    }
+  } else {
+    const DATA_BLOCK & sample = data [0];
+    ring_buffer [t_head].common_data = sample.common_data;
+    t_head   += 1u;
+    t_head   &= RING_MSK;
+    t_lenght += 1u;
+    m_finished = true;
+  }
+  m_head   = t_head;          // vrať zpátky hodnoty
+  m_lenght = t_lenght;
+}
+bool SampleRing::read(DATA_BLOCK & sample) {
+  if (!m_finished) return false;
+  if (!m_lenght) {
+    m_head = m_tail = m_lenght = 0u;
+    m_trigered = false;
+    m_finished = false;
+    return false;
+  }
+  sample    = ring_buffer [m_tail];
+  m_tail   += 1u;
+  m_tail   &= RING_MSK;
+  m_lenght -= 1u;
+  return true;
+}
+uint32_t SampleRing::BlockSend (const char * buf, const uint32_t len) {
+  uint32_t n, ofs = 0, req = len;
+  for (;;) {
+    // spodní vrstva může vrátit i nulu, pokud je FIFO plné
+    n = BaseLayer::Down (buf + ofs, req);
+    ofs += n;   // Posuneme ukazatel
+    req -= n;   // Zmenšíme další požadavek
+    if (!req) break;
+  }
+  return ofs;
+}
+
+void SampleRing::pass() {
+  if (!m_finished) {
+    return;
+  }
+  SendPrefix();
+  DATA_BLOCK  data;
+  while (read(data)) {
+    SendData (data);
+  }
+  BlockSend("\r\n", 2);
+}
+static int to_str (char * buffer, const uint16_t data, const int len = 3) {
+  unsigned val = data;
+  for (int i=len-1; i>=0; --i) {
+    buffer [i] = hexstr [val & 0xF];
+    val >>= 4;
+  }
+  return len;
+}
+uint32_t SampleRing::SendPrefix() {
+  const int buflen = 8;
+  char buffer [buflen];
+  int n = 0;
+  buffer [n++] = '$';
+  SendHeader sh;
+  sh.bits.trig_flg = m_trigered ? 1 : 0;
+  sh.bits.pack_len = m_lenght;
+  n += to_str (buffer + n, sh.common, 4);
+  buffer [n++] = '#';
+  return BlockSend (buffer, n);
+}
+uint32_t SampleRing::SendData (const DATA_BLOCK & data) {
+  const int buflen = 8;
+  char buffer [buflen];
+  int n = 0;
+  n += to_str (buffer + n, data.channels[0]);
+  n += to_str (buffer + n, data.channels[1]);
+  return BlockSend (buffer, n);
+}
+
diff --git a/V203/usb/scope/firmware/samplering.h b/V203/usb/scope/firmware/samplering.h
new file mode 100644
index 0000000..ccab247
--- /dev/null
+++ b/V203/usb/scope/firmware/samplering.h
@@ -0,0 +1,50 @@
+#ifndef SAMPLERING_H
+#define SAMPLERING_H
+#include <stdint.h>
+#include "structures.h"
+#include "baselayer.h"
+
+static constexpr unsigned RING_BIT = 10;
+static constexpr unsigned RING_LEN = 1u << RING_BIT;
+static constexpr unsigned RING_MSK = RING_LEN - 1u;
+
+static constexpr unsigned DATA_HALF_LEN = 1024u;
+static constexpr unsigned DATA_FULL_LEN = DATA_HALF_LEN * 2u;
+
+static constexpr unsigned RCVD_BUFLEN = 16;
+enum RCVD_STATUS {
+  RCVD_IDLE = 0,
+  RCVD_DATA,
+};
+
+class SampleRing : public BaseLayer {
+  [[gnu::aligned(4)]]DATA_BLOCK ring_buffer [RING_LEN];
+  TrigerSettings                m_settings;
+  volatile unsigned             m_head, m_tail;
+  volatile unsigned             m_lenght;
+  bool                          m_old_triger;
+  bool                          m_trigered;
+  volatile bool                 m_finished;
+  TIME_BASE_MODE                m_mode;
+  
+  [[gnu::aligned(4)]]char       rcvd_buffer [RCVD_BUFLEN];
+  unsigned                      rcvd_counter;
+  RCVD_STATUS                   rcvd_status;
+  public:
+    explicit SampleRing () noexcept : BaseLayer(), m_settings(), m_head(0), m_tail(0), m_lenght(0),
+                                     m_old_triger(false), m_trigered(false), m_finished(false), m_mode (TIME_BASE_TRIGERED),
+                                     rcvd_counter(0u), rcvd_status (RCVD_IDLE) {};
+    uint32_t Up         (const char * data, const uint32_t len) override;
+    void write  (DATA_BLOCK const * data);
+    void pass   ();
+  protected:
+    uint32_t BlockSend  (const char * buf,  const uint32_t len);
+    uint32_t SendPrefix ();
+    uint32_t SendData   (const DATA_BLOCK & data);
+    bool read           (DATA_BLOCK & sample);
+    void CmdReceived ();
+    void CommandPass (const unsigned cmd);
+    void ReloadTimer (const unsigned n);
+};
+
+#endif // SAMPLERING_H
diff --git a/V203/usb/scope/firmware/structures.h b/V203/usb/scope/firmware/structures.h
new file mode 100644
index 0000000..4f2ad8b
--- /dev/null
+++ b/V203/usb/scope/firmware/structures.h
@@ -0,0 +1,88 @@
+#ifndef STRUCTURES_DEFINE_H
+#define STRUCTURES_DEFINE_H
+#include <stdint.h>
+
+enum ADC_CHANNELS : uint16_t {
+  V1_VSENSE = 0,
+  V2_VSENSE,
+
+  ADC_MAXCHANNELS,    // interní konstanta - počet kanálů
+};
+typedef uint16_t SAMPLE;
+union DATA_BLOCK {
+  SAMPLE   channels [ADC_MAXCHANNELS];
+  uint32_t common_data;
+};
+enum TRIGER_MODE : uint16_t {
+  TRIGER_MODE_AUTO = 0,
+  TRIGER_MODE_NORMAL,
+  TRIGER_MODE_SINGLE
+};
+struct TrigerSettings {
+  uint16_t     value;
+  uint16_t     offset;
+  TRIGER_MODE  mode;
+  ADC_CHANNELS channel;
+  bool         rising;
+  explicit TrigerSettings () noexcept : value(0x80u), offset(100u), mode(TRIGER_MODE_AUTO), channel(V1_VSENSE), rising(false) {}
+};
+static_assert (sizeof(TrigerSettings) == 10, "TrigerSettings error");
+union SendHeader {
+  struct s_bits {
+    uint16_t pack_len : 15;
+    uint16_t trig_flg :  1;
+  } bits;
+  uint16_t common;
+};
+static_assert (sizeof(SendHeader) == 2, "SendHeader error");
+enum DESTINATION {
+  DEST_CHA = 0,
+  DEST_CHB,
+  DEST_TRIG,
+  DEST_BASE,
+};
+
+enum TRIGGER_CMD {
+  TRIGGER_CMD_MODE = 0,
+  TRIGGER_CMD_VALUE,
+  TRIGGER_CMD_OFSET,
+};
+union TriggerModeUnion {
+  struct s_bits {
+    uint16_t mode    : 2;
+    uint16_t channel : 1;
+    uint16_t rissing : 1;
+    uint16_t unused  : 12;
+  } bits;
+  uint16_t common;
+};
+static_assert (sizeof(TriggerModeUnion) == 2, "TriggerModeUnion error");
+
+union RcvdHeader {
+  struct s_bits {
+    uint16_t cmd_value : 12;
+    uint16_t cmd_type  :  2;
+    uint16_t destinat  :  2;
+  } bits;
+  uint16_t common;
+};
+static_assert (sizeof(RcvdHeader) == 2, "RcvdHeader error");
+
+enum MOVE_ITEMS {
+  MOVE_VALUE = 0,
+  MOVE_OFSET,
+  MOVE_MARKERA,
+  MOVE_MARKERB,
+  TIME_ZOOM,
+};
+enum TIME_BASE_MODE {
+  TIME_BASE_TRIGERED = 0,
+  TIME_BASE_CONTINUOUS,
+};
+struct TimeBaseDescriptor {
+  uint16_t       divider;
+  uint16_t       presc;
+  TIME_BASE_MODE mode;
+};
+
+#endif // STRUCTURES_DEFINE_H
diff --git a/V203/usb/scope/firmware/usb_desc.cpp b/V203/usb/scope/firmware/usb_desc.cpp
new file mode 100644
index 0000000..f932f33
--- /dev/null
+++ b/V203/usb/scope/firmware/usb_desc.cpp
@@ -0,0 +1,83 @@
+/********************************** (C) COPYRIGHT *******************************
+ * File Name          : usb_desc.c
+ * Author             : WCH
+ * Version            : V1.0.0
+ * Date               : 2022/08/20
+ * Description        : usb device descriptor,configuration descriptor,
+ *                      string descriptors and other descriptors.
+*********************************************************************************
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* Attention: This software (modified or not) and binary are used for 
+* microcontroller manufactured by Nanjing Qinheng Microelectronics.
+*******************************************************************************/
+
+#include "usb_desc.h"
+
+/* Device Descriptor */
+const uint8_t  MyDevDescr[] =
+{
+    0x12,       // bLength
+    0x01,       // bDescriptorType (Device)
+    0x10, 0x01, // bcdUSB 1.10
+    0x02,       // bDeviceClass
+    0x00,       // bDeviceSubClass
+    0x00,       // bDeviceProtocol
+    DEF_USBD_UEP0_SIZE,   // bMaxPacketSize0 64
+    (uint8_t)DEF_USB_VID, (uint8_t)(DEF_USB_VID >> 8),  // idVendor 0x1A86
+    (uint8_t)DEF_USB_PID, (uint8_t)(DEF_USB_PID >> 8),  // idProduct 0x5537
+    DEF_IC_PRG_VER, 0x00, // bcdDevice 0.01
+    0x01,       // iManufacturer (String Index)
+    0x02,       // iProduct (String Index)
+    0x03,       // iSerialNumber (String Index)
+    0x01,       // bNumConfigurations 1
+};
+
+/* Configuration Descriptor */
+const uint8_t  MyCfgDescr[] =
+{
+    /* Configure descriptor */
+    0x09, 0x02, 0x43, 0x00, 0x02, 0x01, 0x00, 0x80, 0x32,
+
+    /* Interface 0 (CDC) descriptor */
+    0x09, 0x04, 0x00, 0x00, 0x01, 0x02, 0x02, 0x01,  0x00,
+
+    /* Functional Descriptors */
+    0x05, 0x24, 0x00, 0x10, 0x01,
+
+    /* Length/management descriptor (data class interface 1) */
+    0x05, 0x24, 0x01, 0x00, 0x01,
+    0x04, 0x24, 0x02, 0x02,
+    0x05, 0x24, 0x06, 0x00, 0x01,
+
+    /* Interrupt upload endpoint descriptor */
+    0x07, 0x05, 0x81, 0x03, (uint8_t)DEF_USBD_ENDP1_SIZE, (uint8_t)( DEF_USBD_ENDP1_SIZE >> 8 ), 0x01,
+
+    /* Interface 1 (data interface) descriptor */
+    0x09, 0x04, 0x01, 0x00, 0x02, 0x0A, 0x00, 0x00, 0x00,
+
+    /* Endpoint descriptor */
+    0x07, 0x05, 0x02, 0x02, (uint8_t)DEF_USBD_ENDP2_SIZE, (uint8_t)( DEF_USBD_ENDP2_SIZE >> 8 ), 0x00,
+
+    /* Endpoint descriptor */
+    0x07, 0x05, 0x83, 0x02, (uint8_t)DEF_USBD_ENDP3_SIZE, (uint8_t)( DEF_USBD_ENDP3_SIZE >> 8 ), 0x00,
+};
+#define DEF_STRDESC(p,n) w_text<(sizeof(p)>>1)>n={sizeof(n)-2u,3u,{p}}
+template<const unsigned N> struct w_text {
+  uint8_t       len, typ;
+  const char16_t str [N];
+};
+static const DEF_STRDESC((u"Kizarm Labs."),   str_1);
+static const DEF_STRDESC((u"USB Osciloscope"),str_2);
+static const DEF_STRDESC((u"00001"),          str_3);
+/* Language Descriptor */
+static const uint8_t LangDescr[] = {
+    0x04, 0x03, 0x09, 0x04
+};
+const uint8_t * StringDescArray [DEF_MAX_STRINGS] = {
+  LangDescr,
+  reinterpret_cast<const uint8_t*> (&str_1),
+  reinterpret_cast<const uint8_t*> (&str_2),
+  reinterpret_cast<const uint8_t*> (&str_3),
+};
+
+
diff --git a/V203/usb/scope/firmware/usb_desc.h b/V203/usb/scope/firmware/usb_desc.h
new file mode 100644
index 0000000..9b578b9
--- /dev/null
+++ b/V203/usb/scope/firmware/usb_desc.h
@@ -0,0 +1,66 @@
+/********************************** (C) COPYRIGHT *******************************
+ * File Name          : usb_desc.h
+ * Author             : WCH
+ * Version            : V1.0.0
+ * Date               : 2022/08/20
+ * Description        : header file of usb_desc.c
+*********************************************************************************
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* Attention: This software (modified or not) and binary are used for 
+* microcontroller manufactured by Nanjing Qinheng Microelectronics.
+*******************************************************************************/
+
+#ifndef USER_USB_DESC_H_
+#define USER_USB_DESC_H_
+
+#include <stdint.h>
+
+/******************************************************************************/
+/* global define */
+/* file version */
+#define DEF_FILE_VERSION             0x01
+/* usb device info define  */
+#define DEF_USB_VID                  0x1A86
+#define DEF_USB_PID                  0xFE0C
+/* USB device descriptor, device serial number(bcdDevice) */
+#define DEF_IC_PRG_VER               DEF_FILE_VERSION
+
+/******************************************************************************/
+/* usb device endpoint size define */
+#define DEF_USBD_UEP0_SIZE           64     /* usb hs/fs device end-point 0 size */
+/* FS */
+#define DEF_USBD_FS_PACK_SIZE        64     /* usb fs device max bluk/int pack size */
+#define DEF_USBD_FS_ISO_PACK_SIZE    1023   /* usb fs device max iso pack size */
+/* LS */
+#define DEF_USBD_LS_UEP0_SIZE        8      /* usb ls device end-point 0 size */
+#define DEF_USBD_LS_PACK_SIZE        64     /* usb ls device max int pack size */
+
+/* Pack size */
+#define DEF_USBD_ENDP1_SIZE          DEF_USBD_FS_PACK_SIZE
+#define DEF_USBD_ENDP2_SIZE          DEF_USBD_FS_PACK_SIZE
+#define DEF_USBD_ENDP3_SIZE          DEF_USBD_FS_PACK_SIZE
+#define DEF_USBD_ENDP4_SIZE          DEF_USBD_FS_PACK_SIZE
+#define DEF_USBD_ENDP5_SIZE          DEF_USBD_FS_PACK_SIZE
+#define DEF_USBD_ENDP6_SIZE          DEF_USBD_FS_PACK_SIZE
+#define DEF_USBD_ENDP7_SIZE          DEF_USBD_FS_PACK_SIZE
+
+/******************************************************************************/
+/* usb device Descriptor length, length of usb descriptors, if one descriptor not
+ * exists , set the length to 0  */
+#define DEF_USBD_DEVICE_DESC_LEN     ((uint8_t)MyDevDescr[0])
+#define DEF_USBD_CONFIG_DESC_LEN     ((uint16_t)MyCfgDescr[2] + (uint16_t)(MyCfgDescr[3] << 8))
+#define DEF_USBD_REPORT_DESC_LEN     0
+
+#define DEF_MAX_STRINGS (4)
+/******************************************************************************/
+/* external variables */
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+  extern const uint8_t   MyDevDescr[ ];
+  extern const uint8_t   MyCfgDescr[ ];
+  extern const uint8_t * StringDescArray [DEF_MAX_STRINGS];
+#ifdef __cplusplus
+};
+#endif // __cplusplus
+#endif /* USER_USB_DESC_H_ */
diff --git a/V203/usb/scope/software/datasource.cpp b/V203/usb/scope/software/datasource.cpp
new file mode 100644
index 0000000..c06fa00
--- /dev/null
+++ b/V203/usb/scope/software/datasource.cpp
@@ -0,0 +1,177 @@
+#include "datasource.h"
+#include "helpers.h"
+
+static constexpr unsigned DATASIZE = 0x2000;
+
+DataSource::DataSource(QObject * p) : QObject (p),
+    usart (QString("/dev/serial/by-id/usb-Kizarm_Labs._USB_Osciloscope_00001-if00")),
+    trigerSettings () {
+  in_buffer  = new char [DATASIZE];
+  packet_buf = new char [DATASIZE];
+  packet_cnt = 0;
+  state = StateIdle;
+  catching = true;
+  
+  connect (&usart, SIGNAL (readyRead()), this, SLOT (read_data()));
+  usart.open (QIODevice::ReadWrite);
+}
+DataSource::~DataSource() {
+  usart.close();
+  delete [] in_buffer;
+  delete [] packet_buf;
+}
+void DataSource::Start() {
+  catching = true;
+}
+
+void DataSource::read_data() {
+  const long numRead = usart.read(in_buffer, DATASIZE);
+  if (numRead == 0) return;
+  // qDebug ("readen = %ld", numRead);
+  parse_input (in_buffer, numRead);
+}
+void DataSource::parse_input(const char * data, const long len) {
+  for (long i=0; i<len; i++) {
+    const char c = data [i];
+    switch (c) {
+      case '$':
+        state = StateHeader;
+        packet_cnt = 0;
+        break;
+      case '#':
+        parse_header();
+        state = StateData;
+        packet_cnt = 0;
+        break;
+      case '\r':
+      case '\n':
+        parse_packet();
+        state = StateIdle;
+        packet_cnt = 0;
+        break;
+      default:
+        packet_buf [packet_cnt] = c;
+        packet_cnt += 1;
+        if (packet_cnt >= (int) DATASIZE) {
+          packet_cnt = 0;
+          qDebug ("Buffer overflow");
+        }
+        break;
+    }
+  }
+}
+void DataSource::parse_header() {
+  if (packet_cnt != 4) return;
+  packet_buf [4] = '\0';
+  QString h (packet_buf);
+  bool ok = false;
+  const unsigned hdr = h.toUInt(&ok, 16);
+  if (!ok) return;
+  header.common = hdr;
+  //qDebug ("header:%04X", hdr);
+  if (header.bits.trig_flg) {
+    emit PaketTriggered ();
+  }
+}
+void DataSource::parse_packet() {
+  QVector<int> ChA, ChB;
+  if (state != StateData) return;
+  bool ok = false;
+  int k=0;
+  for (int n=0; n<packet_cnt; n+=3) {
+    char buf [4];
+    memcpy (buf, packet_buf+n, 3);
+    buf[3] = '\0';
+    QString s (buf);
+    const unsigned sample = s.toUInt(&ok, 16);
+    if (ok) {
+      if (k & 1) {
+        ChB.push_back (sample);
+      } else {
+        ChA.push_back (sample);
+      }
+    }
+    
+    k += 1;
+  }
+  bool sok = true;
+  if (ChA.size() != (int) header.bits.pack_len) sok = false;
+  if (ChB.size() != (int) header.bits.pack_len) sok = false;
+  if (sok) {
+    if (trigerSettings.mode == TRIGER_MODE_SINGLE) {
+      if (catching) {
+        catching = false;
+        emit Channels_received (ChA, ChB);
+      }
+    } else {
+      emit Channels_received (ChA, ChB);
+    }
+  } else {
+    qDebug ("packet error: ChA=%d, ChB=%d, size=%d", ChA.size(), ChB.size(), header.bits.pack_len);
+  }
+}
+void DataSource::SendTrigerMode(int n) {
+  trigerSettings.mode = static_cast<TRIGER_MODE> (n);
+  send_trig_mode();
+}
+void DataSource::SendTrigerEdge(int n) {
+  trigerSettings.rising = n ? true : false;
+  send_trig_mode();
+}
+void DataSource::SendTrigerChan(int n) {
+  trigerSettings.channel = static_cast<ADC_CHANNELS> (n);
+  send_trig_mode();
+}
+
+void DataSource::send_trig_mode () {
+  RcvdHeader hdr;
+  hdr.common = 0u;
+  hdr.bits.destinat = DEST_TRIG;
+  hdr.bits.cmd_type = TRIGGER_CMD_MODE;
+  TriggerModeUnion tmu;
+  tmu.common = 0u;
+  tmu.bits.mode    = trigerSettings.mode;
+  tmu.bits.channel = trigerSettings.channel;
+  tmu.bits.rissing = trigerSettings.rising ? 1u : 0u;
+  hdr.bits.cmd_value = tmu.common;
+  
+  const unsigned len = 64;
+  char buffer [len];
+  int r = snprintf(buffer, len, "$%04X\r\n", (int) hdr.common);
+  buffer [r] = '\0';
+  usart.write (buffer, r);
+  qDebug ("%d:%s", r, strip_eol(buffer));
+}
+void DataSource::SettingChanged(int n) {
+  const MOVE_ITEMS items = static_cast<MOVE_ITEMS>(n);
+  RcvdHeader hdr;
+  hdr.common = 0u;
+  hdr.bits.destinat = DEST_TRIG;
+  switch (items) {
+    case MOVE_VALUE: hdr.bits.cmd_type = TRIGGER_CMD_VALUE; hdr.bits.cmd_value = trigerSettings.value;  break;
+    case MOVE_OFSET: hdr.bits.cmd_type = TRIGGER_CMD_OFSET; hdr.bits.cmd_value = trigerSettings.offset; break;
+    default : break;
+  }
+
+  const unsigned len = 64;
+  char buffer [len];
+  int r = snprintf(buffer, len, "$%04X\r\n", (int) hdr.common);
+  buffer [r] = '\0';
+  usart.write (buffer, r);
+  // qDebug ("%d::%d:%s", n, r, strip_eol(buffer));
+}
+void DataSource::SendBaseRange (int n) {
+  RcvdHeader hdr;
+  hdr.common = 0u;
+  hdr.bits.destinat  = DEST_BASE;
+  hdr.bits.cmd_value = n;
+  const unsigned len = 64;
+  char buffer [len];
+  int r = snprintf(buffer, len, "$%04X\r\n", (int) hdr.common);
+  buffer [r] = '\0';
+  usart.write (buffer, r);
+  qDebug ("%d:%s", r, strip_eol(buffer));
+}
+
+
+
diff --git a/V203/usb/scope/software/datasource.h b/V203/usb/scope/software/datasource.h
new file mode 100644
index 0000000..eeb94c5
--- /dev/null
+++ b/V203/usb/scope/software/datasource.h
@@ -0,0 +1,52 @@
+#ifndef DATASOURCE_H
+#define DATASOURCE_H
+
+#include <QObject>
+#include <QSerialPort>
+#include <QVector>
+#include <QPoint>
+#include "structures.h"
+
+enum ParserState {
+  StateIdle = 0,
+  StateHeader,
+  StateData,
+};
+/**
+ */
+class DataSource : public QObject {
+    Q_OBJECT
+  QSerialPort    usart;
+  TrigerSettings trigerSettings;
+  char      *    in_buffer;
+  ParserState    state;
+  char      *    packet_buf;
+  int            packet_cnt;
+  SendHeader     header;
+  bool           catching;
+  public:
+    explicit DataSource (QObject * p = nullptr);
+    virtual ~DataSource ();
+    TrigerSettings * getTrigger () {
+      return & trigerSettings;
+    }
+    void SendTrigerMode (int n);
+    void SendTrigerEdge (int n);
+    void SendTrigerChan (int n);
+    void SendBaseRange  (int n);
+    void Start          ();
+  public slots:
+    void read_data ();
+    void SettingChanged (int n);
+  signals:
+    void Channels_received(QVector<int>, QVector<int>);
+    void PaketTriggered   ();
+  protected:
+    void parse_input (const char * data, const long len);
+    void parse_packet ();
+    void parse_header ();
+  protected:
+    void send_trig_mode ();
+};
+
+#endif // DATASOURCE_H
diff --git a/V203/usb/scope/software/displaywidget.cpp b/V203/usb/scope/software/displaywidget.cpp
new file mode 100644
index 0000000..cc5b62a
--- /dev/null
+++ b/V203/usb/scope/software/displaywidget.cpp
@@ -0,0 +1,277 @@
+#include <QPainter>
+#include <QResizeEvent>
+#include <QPaintEvent>
+#include <QWheelEvent>
+#include <QSettings>
+#include <math.h>
+#include "displaywidget.h"
+#include "helpers.h"
+
+static const double TimeBaseSteps [] = {
+  2.0e-6, 5.0e-6, 1.0e-5, 2.0e-5, 5.0e-5, 1.0e-4, 2.0e-4, 5.0e-4,
+  1.0e-3, 2.0e-3, 5.0e-3, 1.0e-2, 2.0e-2, 5.0e-2, 1.0e-1, 2.0e-1,
+  
+  5.0e-1, 1.0,
+};
+static const double ChannelsSteps [] = {
+  1.0, 2.0, 5.0,
+};
+static constexpr double REF_Y  = 3.3;                 // maximum napětí převodníku
+static constexpr double MAX_Y  = double (1 << 12);    // 12. bit rozlišení - 4096 steps
+static constexpr double STEP_Y = REF_Y / MAX_Y;       // jeden krok ve Voltech
+
+DisplayWidget::DisplayWidget(QWidget * p) : QWidget(p), ACopy(), BCopy(), m_forward(), m_inverse(), background(), m_ts(nullptr),
+  ChA (1024), ChB(1024), m_items (MOVE_VALUE), m_timeBase(6), m_ChBase(0), m_timeCount(0u) {
+    x_lenght = 1024;
+    m_time.a = 200.0;
+    m_time.b = 300.0;
+    m_volt.a = 1.0 / STEP_Y;
+    m_volt.b = 2.0 / STEP_Y;
+    marker_type = MARKER_TIME;
+    int n = 0;
+    for (QPointF & e : ChA) { const QPointF p (n++, 0); e = p; }
+    n = 0;
+    for (QPointF & e : ChB) { const QPointF p (n++, 0); e = p; }
+}
+DisplayWidget::~DisplayWidget() {
+}
+void DisplayWidget::MarkerChanged (bool b) {
+  // qDebug ("Marker : %s", b ? "Time" : "Volt"); // OK
+  if (b) marker_type = MARKER_TIME;
+  else   marker_type = MARKER_VOLT;
+  drawBackground();
+  update();
+}
+
+void DisplayWidget::TriggerValues(int n) {
+  m_items = static_cast<MOVE_ITEMS>(n);
+}
+static constexpr double FMULT = 1.189207115002721;
+static constexpr double IMULT = 1.0 / FMULT;
+void DisplayWidget::wheelEvent(QWheelEvent * event) {
+  if (m_ts == nullptr) return;
+  const QPoint d = event->angleDelta();
+  const int increment = d.y() > 0 ? +1 : -1;
+  switch (m_items) {
+    case MOVE_VALUE: {
+      m_ts->value  += increment * 4;
+      emit SettingsChanged (m_items);
+    } break;
+    case MOVE_OFSET: {
+      m_ts->offset += increment;
+      emit SettingsChanged (m_items);
+    } break;
+    case MOVE_MARKERA: {
+      if (marker_type == MARKER_TIME) m_time.a += increment;
+      else                            m_volt.a += increment;
+    } break;
+    case MOVE_MARKERB: {
+      if (marker_type == MARKER_TIME) m_time.b += increment;
+      else                            m_volt.b += increment;
+    } break;
+    case TIME_ZOOM: {
+      const double mx = FMULT * double (size().width()) / x_lenght;
+      if ((m_forward.m11() > mx) or (increment > 0)) {  // limit to window
+        const QMatrix m = increment > 0 ? QMatrix (FMULT,0,0,1,0,0) : QMatrix (IMULT,0,0,1,0,0);
+        m_forward *= m;
+        m_inverse  = m_forward.inverted();
+      }
+    } break;
+    default : {
+      qDebug ("wheelEvent : %d", int (m_items));
+    } break;
+  }
+  drawBackground();
+  update();
+  QWidget::wheelEvent(event);
+}
+void DisplayWidget::mousePressEvent(QMouseEvent * event) {
+  if (m_ts == nullptr) return;
+  const QPointF dp = m_inverse.map (event->pos ());
+  // qDebug ("dp:[%g, %g]", dp.x(), dp.y());
+  switch (m_items) {
+    case MOVE_VALUE: {
+      m_ts->value  = dp.y();
+      emit SettingsChanged (m_items);
+    } break;
+    case MOVE_OFSET: {
+      m_ts->offset = dp.x();
+      emit SettingsChanged (m_items);
+    } break;
+    case MOVE_MARKERA: {
+      if (marker_type == MARKER_TIME) m_time.a = dp.x();
+      else                            m_volt.a = dp.y();
+    } break;
+    case MOVE_MARKERB: {
+      if (marker_type == MARKER_TIME) m_time.b = dp.x();
+      else                            m_volt.b = dp.y();
+    } break;
+    case TIME_ZOOM: QWidget::mousePressEvent(event); return;
+    default : {
+      qDebug ("mousePressEvent : %d", int (m_items));
+    } break;
+  }
+  drawBackground();
+  update();
+  QWidget::mousePressEvent(event);
+}
+
+void DisplayWidget::resizeEvent(QResizeEvent * event) {
+  const QSize sz = event->size();
+  reloadMatrix (sz);
+  QImage tmpi (sz, QImage::Format_ARGB32);
+  background = tmpi;
+  drawBackground();
+  QWidget::resizeEvent(event);
+}
+void DisplayWidget::paintEvent(QPaintEvent * event) {
+  QPainter p (this);
+  p.drawImage(event->rect(), background);
+  QPen pa (QColor(0,255, 0,255), 2);
+  QPen pb (QColor(255,64,0,255), 2);
+  p.setPen(pb);
+  p.drawPolyline (m_forward.map(ChB));
+  p.setPen(pa);
+  p.drawPolyline (m_forward.map(ChA));
+}
+void DisplayWidget::setTrigger(TrigerSettings * ts) {
+  m_ts = ts;
+}
+void DisplayWidget::DispChannels(QVector<int> cha, QVector<int> chb) {
+  ACopy = cha;
+  BCopy = chb;
+  reloadData();
+  update();
+}
+static constexpr unsigned T_SIZE = 1u << 10;
+static constexpr unsigned T_MASK = T_SIZE - 1u;
+void DisplayWidget::reloadData () {
+  const int Alen = ACopy.size();
+  const int Blen = BCopy.size();
+  QVector<QPointF> va (Alen), vb (Blen);
+  if (Alen == 1 and Blen == 1) { // kontinuální mód
+    if (ChA.size() != T_SIZE) { ChA = QPolygonF (T_SIZE); }
+    if (ChB.size() != T_SIZE) { ChB = QPolygonF (T_SIZE); }
+    const QPointF pta (m_timeCount, ACopy [0]), ptb (m_timeCount, BCopy [0]);
+    ChA[m_timeCount] = pta;
+    ChB[m_timeCount] = ptb;
+    // printf("mode continuum\n");
+    m_timeCount += 1u;
+    m_timeCount &= T_MASK;
+    return;
+  }
+  for (int n=0u; n<Alen; n++) {
+    const double x = (double (n));
+    const double y = ( ACopy [n]);
+    va [n] = QPointF (x,y);
+  }
+  ChA = QPolygonF (va);
+  for (int n=0u; n<Blen; n++) {
+    const double x = (double (n));
+    const double y = ( BCopy [n]);
+    vb [n] = QPointF (x,y);
+  }
+  ChB = QPolygonF (vb);
+  const int l = Alen > Blen ? Alen : Blen;
+  if (l != x_lenght) {
+    x_lenght = l;
+    reloadMatrix (size());
+  }
+}
+void DisplayWidget::reloadMatrix(const QSize & sz) {
+  const double xm = sz.width();
+  const double ym = sz.height();
+  const double xz = xm / (x_lenght);   // převod zpět ma pixely
+  const double yz = ym / (MAX_Y);
+  const QMatrix tm (xz,0,0,-yz, 0, ym);
+  m_forward = tm;
+  m_inverse = m_forward.inverted();
+}
+
+void DisplayWidget::TimeBaseRange(int n) {
+  m_timeBase = n;
+  reloadMatrix (size());
+  drawBackground();
+  update();
+}
+
+void DisplayWidget::drawBackground() {
+  QPainter p (&background);
+  QRect r = background.rect();
+  p.fillRect (r, QBrush(Qt::black, Qt::SolidPattern));
+  if (!m_ts) return;
+  const double yb = 0.0, ye = MAX_Y;
+  const double xb = 0.0, xe = x_lenght;
+  // rastr
+  QPen pg (QColor(64,64,64), 1);
+  p.setPen(pg);
+  const double dx = 100.0;
+  for (double x=xb; x<xe; x+=dx) {
+    const QLineF yline (x, yb, x, ye);
+    p.drawLine (m_forward.map(yline));
+  }
+  const double dv = 0.5;
+  const double dy = dv / STEP_Y;
+  for (double y=yb; y<ye; y+=dy) {
+    const QLineF xline (xb, y, xe, y);
+    p.drawLine (m_forward.map(xline));
+  }
+  // triger
+  QPointF trg (m_ts->offset, m_ts->value);
+  QPen pc (QColor(0,0,255), 1);
+  p.setPen(pc);
+  const QLineF hline (xb, trg.y(), xe, trg.y());
+  const QLineF vline (trg.x(), yb, trg.x(), ye);
+  p.drawLine (m_forward.map(hline));
+  p.drawLine (m_forward.map(vline));
+  // markers
+  QPen pm (QColor(255,255,0,196), 2);
+  p.setPen(pm);
+  if (marker_type == MARKER_TIME) {
+    const QLineF ma (m_time.a, yb, m_time.a, ye);
+    const QLineF mb (m_time.b, yb, m_time.b, ye);
+    p.drawLine (m_forward.map(ma));
+    p.drawLine (m_forward.map(mb));
+  } else {
+    const QLineF ma (xb, m_volt.a, xe, m_volt.a);
+    const QLineF mb (xb, m_volt.b, xe, m_volt.b);
+    p.drawLine (m_forward.map(ma));
+    p.drawLine (m_forward.map(mb));
+  }
+  // text
+  p.setPen (QPen (QColor(255,255,0)));
+  QFont font = p.font();
+  font.setPixelSize(16);
+  p.setFont (font);
+  QString desc;
+  const double xz = TimeBaseSteps [m_timeBase];
+  const double yz = STEP_Y;
+  const int    my = r.size().height() - 10;
+  desc.sprintf("T=%ss/d; A,B=%gV/d", ing_fmt (xz * dx).c_str() , dv);
+  p.drawText(10,20, desc);
+  
+  if (marker_type == MARKER_TIME) {
+    const double delta = xz * (m_time.b - m_time.a);
+    const double freq  = delta == 0.0 ? 0.0 : 1.0 / delta;
+    desc.sprintf("Marker A: %ss, Marker B: %ss, Δ=%ss, f=%sHz", ing_fmt(xz * m_time.a).c_str(), ing_fmt(xz * m_time.b).c_str(),
+                                                                ing_fmt(delta).c_str(), ing_fmt(freq).c_str());
+  } else {
+    const double delta = yz * (m_volt.b - m_volt.a);
+    desc.sprintf("Marker A: %sV, Marker B: %sV, Δ=%sV", ing_fmt(yz * m_volt.a).c_str(), ing_fmt(yz * m_volt.b).c_str(),
+                                                                ing_fmt(delta).c_str());
+  }
+  p.drawText(10,my, desc);
+}
+void DisplayWidget::saveSettings(QSettings & setting) {
+  setting.setValue("TimeBaseIndex", m_timeBase);
+  setting.setValue("TimeA", m_time.a);
+  setting.setValue("TimeB", m_time.b);
+  setting.setValue("VoltA", m_volt.a);
+  setting.setValue("VoltB", m_volt.b);
+}
+void DisplayWidget::restSettings(QSettings & setting) {
+  m_time.a = setting.value("TimeA").toDouble();
+  m_time.b = setting.value("TimeB").toDouble();
+  m_volt.a = setting.value("VoltA").toDouble();
+  m_volt.b = setting.value("VoltB").toDouble();
+}
diff --git a/V203/usb/scope/software/displaywidget.h b/V203/usb/scope/software/displaywidget.h
new file mode 100644
index 0000000..7d93985
--- /dev/null
+++ b/V203/usb/scope/software/displaywidget.h
@@ -0,0 +1,58 @@
+#ifndef DISPLAYWIDGET_H
+#define DISPLAYWIDGET_H
+#include <QWidget>
+#include <QVector>
+#include <QPoint>
+#include <QImage>
+#include <QMatrix>
+#include "structures.h"
+/**
+ */
+class QSettings;
+class DisplayWidget : public QWidget {
+  Q_OBJECT
+  QVector<int> ACopy;
+  QVector<int> BCopy;
+  QMatrix  m_forward;
+  QMatrix  m_inverse;
+  QImage   background;
+  TrigerSettings * m_ts;
+  QPolygonF   ChA, ChB;
+  MOVE_ITEMS  m_items;
+  int         m_timeBase;
+  int         m_ChBase;
+  double      x_lenght;
+  struct MarkSetting {
+    double a,b;
+  }           m_time, m_volt;
+  enum MARKER_ENUM {
+    MARKER_TIME = 0,
+    MARKER_VOLT,
+  }          marker_type;
+  unsigned   m_timeCount;
+  public:
+    explicit DisplayWidget (QWidget * p);
+    virtual ~DisplayWidget ();
+    void     setTrigger    (TrigerSettings * ts);
+    void     TriggerValues (int n);
+    void     TimeBaseRange (int n);
+    void     MarkerChanged (bool);
+    void     saveSettings  (QSettings & setting);
+    void     restSettings  (QSettings & setting);
+    
+    void resizeEvent    (QResizeEvent * event) override;
+    void paintEvent     (QPaintEvent  * event) override;
+    void wheelEvent     (QWheelEvent  * event) override;
+    void mousePressEvent(QMouseEvent  * event) override;
+    
+  public slots:
+    void DispChannels (QVector<int>, QVector<int>);
+  signals:
+    void SettingsChanged (int n);
+  protected:
+    void drawBackground ();
+    void reloadData     ();
+    void reloadMatrix   (const QSize & sz);
+};
+
+#endif // DISPLAYWIDGET_H
diff --git a/V203/usb/scope/software/helpers.cpp b/V203/usb/scope/software/helpers.cpp
new file mode 100644
index 0000000..252fe0f
--- /dev/null
+++ b/V203/usb/scope/software/helpers.cpp
@@ -0,0 +1,47 @@
+#include <cstdio>
+#include <cmath>
+#include "helpers.h"
+
+char * strip_eol (char * str) {
+  char * ptr = str;
+  for (;;) {
+    const char c = * ptr;
+    if (c == '\0') break;
+    else if (c == '\r') * ptr = '\0';
+    else if (c == '\n') * ptr = '\0';
+    ptr++;
+  }
+  return str;
+}
+std::string ing_fmt (const double par, const unsigned dnum) {
+  const char * suffixes [] = {"a", "f", "p", "n", "μ", "m", " ", "k", "M", "G", "T", "P", "E"};
+  bool sign = false;
+  double value = par;
+  if (par < 0.0) {
+    value = - par;
+    sign  = true;
+  }
+  if (value < 1.0e-18) return std::string ("0");
+  if (value > 1.0e+18) return std::string ("hafo");
+  
+  const double dlog = log10 (value) + 18.0;
+  double fractional, integer;
+  fractional = modf (dlog, & integer);
+  const double mult = pow (10.0, double (dnum - 1));
+  double avgf = pow (10.0, fractional);       // do mezí 1.0 až 9.9999...
+  avgf *= mult;
+  avgf  = round (avgf);                       // a teď zaokrouhli
+  avgf /= mult;
+  div_t dt = div (int(integer), 3);
+  avgf *= pow (10.0, double (dt.rem));
+  // printf("%g:%g (%f) [%d:%d]{%s}\n", integer, fractional, avgf, dt.quot, dt.rem, suffixes[dt.quot]);
+  
+  const unsigned buflen = 64;
+  char buffer [buflen];
+  const int r = snprintf(buffer, buflen, "%g%s", avgf, suffixes [dt.quot]);
+  buffer [r] = '\0';
+
+  std::string result (buffer, r);
+  if (sign) result = std::string("-") + result;
+  return result;
+}
diff --git a/V203/usb/scope/software/helpers.h b/V203/usb/scope/software/helpers.h
new file mode 100644
index 0000000..d337a7f
--- /dev/null
+++ b/V203/usb/scope/software/helpers.h
@@ -0,0 +1,8 @@
+#ifndef HELPERS_H
+#define HELPERS_H
+#include <string>
+
+extern char * strip_eol (char * str);
+extern std::string ing_fmt (const double par, const unsigned dnum = 3u);
+
+#endif // HELPERS_H
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diff --git a/V203/usb/scope/software/main.cpp b/V203/usb/scope/software/main.cpp
new file mode 100644
index 0000000..d55a291
--- /dev/null
+++ b/V203/usb/scope/software/main.cpp
@@ -0,0 +1,9 @@
+#include "main.h"
+
+int main (int argc, char *argv[]) {
+  // QApplication::setStyle("plastique");
+  QApplication a (argc, argv);
+  MainWindow w;
+  w.show();
+  return a.exec();
+}
diff --git a/V203/usb/scope/software/main.h b/V203/usb/scope/software/main.h
new file mode 100644
index 0000000..d758843
--- /dev/null
+++ b/V203/usb/scope/software/main.h
@@ -0,0 +1,11 @@
+#ifndef _MAIN_H_
+#define _MAIN_H_
+#include <QApplication>
+#include "mainwindow.h"
+#include <qstyle.h>
+
+/**
+ *
+ * */
+
+#endif // _MAIN_H_
diff --git a/V203/usb/scope/software/mainwindow.cpp b/V203/usb/scope/software/mainwindow.cpp
new file mode 100644
index 0000000..06a3a8e
--- /dev/null
+++ b/V203/usb/scope/software/mainwindow.cpp
@@ -0,0 +1,151 @@
+#include <QDesktopWidget>
+#include <QFileDialog>
+#include <QPainter>
+#include <QSettings>
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+/*
+#undef  qDebug
+#define qDebug(p, ...)
+*/
+static const char * TrigerChannelTexts [] = {
+  "Channel A", "Channel B"
+};
+static const char * TrigerModeTexts [] = {
+  "Auto", "Normal", "Single"
+};
+static const char * TrigerEdgeTexts [] = {
+   "Rising", "Faling"
+};
+static const char * TrigerSelectTexts [] = {
+  "Trig.Value", "Trig.Offset", "Marker A", "Marker B", "Time Zoom"
+};
+static const char * TimeBaseTexts [] = {
+  "2μs",  "5μs",  "10μs", "20μs", "50μs", "100μs", "200μs","500μs",
+  "1ms",  "2ms",  "5ms",  "10ms", "20ms", "50ms", "100ms", "200ms",
+  "500ms", "1s",
+};
+
+MainWindow::MainWindow (QWidget * parent)
+  : QMainWindow (parent), firmware(parent) {
+  ui  = new Ui_MainWindow;
+  ui->setupUi (this);
+  ui->radio_a->setChecked(true);
+  ui->Display->setTrigger (firmware.getTrigger());
+  for (auto & e: TrigerModeTexts)    ui->comboMode     ->addItem(QString(e));
+  for (auto & e: TrigerChannelTexts) ui->comboChannel  ->addItem(QString(e));
+  for (auto & e: TrigerEdgeTexts)    ui->comboRissing  ->addItem(QString(e));
+  for (auto & e: TrigerSelectTexts)  ui->comboValue    ->addItem(QString(e));
+  for (auto & e: TimeBaseTexts)      ui->comboTimeRange->addItem(QString(e));
+  
+  setWindowTitle ("Scope");
+  setWindowIcon  (QIcon(":ico"));
+//setWindowFlags(Qt::Window | Qt::FramelessWindowHint);
+  connect (&firmware, SIGNAL (Channels_received(QVector<int>, QVector<int>)),
+           ui->Display, SLOT (DispChannels     (QVector<int>, QVector<int>)));
+  connect (&firmware, SIGNAL (PaketTriggered()), this, SLOT(PaketTriggered()));
+  
+  connect (ui->Display,    SIGNAL(SettingsChanged(int)), &firmware, SLOT(SettingChanged(int)));
+  connect (ui->buttonStart,SIGNAL(pressed()),       this, SLOT(Started()));
+  connect (ui->actionQuit, SIGNAL(triggered(bool)), this, SLOT(close()));
+  connect (ui->radio_a,    SIGNAL(toggled(bool)),   this, SLOT(MarkerChanged(bool)));
+  connect (ui->actionExport_Image, SIGNAL(triggered(bool)), this, SLOT(ExportImage (bool)));
+  connect (ui->actionSaveSet,  SIGNAL(triggered(bool)),     this, SLOT(SaveSettings(bool)));
+  connect (ui->actionRestSet,  SIGNAL(triggered(bool)),     this, SLOT(RestSettings(bool)));
+  
+  connect (ui->comboMode,      SIGNAL(activated(int)), this, SLOT(SendTrigerMode(int)));
+  connect (ui->comboRissing,   SIGNAL(activated(int)), this, SLOT(SendTrigerEdge(int)));
+  connect (ui->comboChannel,   SIGNAL(activated(int)), this, SLOT(SendTrigerChan(int)));
+  connect (ui->comboValue,     SIGNAL(activated(int)), this, SLOT(TriggerValues (int)));
+  connect (ui->comboTimeRange, SIGNAL(activated(int)), this, SLOT(TimeBaseRange (int)));
+  
+  ui->comboTimeRange->setCurrentIndex(6);
+  ui->buttonStart->setEnabled(false);
+}
+
+MainWindow::~MainWindow () {
+  delete ui;
+}
+void MainWindow::Started() {
+  firmware.Start();
+}
+void MainWindow::MarkerChanged(bool b) {
+  ui->Display->MarkerChanged (b);
+}
+
+void MainWindow::TriggerValues (int n) {
+  ui->Display->TriggerValues(n);
+}
+void MainWindow::SendTrigerMode (int n) {
+  if (n == TRIGER_MODE_SINGLE) ui->buttonStart->setEnabled(true);
+  else                         ui->buttonStart->setEnabled(false);
+  firmware.SendTrigerMode(n);
+}
+void MainWindow::SendTrigerEdge (int n) {
+  firmware.SendTrigerEdge(n);
+}
+void MainWindow::SendTrigerChan (int n) {
+  firmware.SendTrigerChan(n);
+}
+void MainWindow::TimeBaseRange (int n) {
+  firmware.SendBaseRange(n);
+  ui->Display->TimeBaseRange(n);
+}
+void MainWindow::PaketTriggered () {
+  statusBar()->showMessage(QString("TRIGER"), 500);
+}
+
+void MainWindow::ExportImage (bool) {
+  QWidget * pw = ui->Display;
+  QString fileName = QFileDialog::getSaveFileName (this,
+               tr ("Save File"), ".", "Images Files(*.png)");
+  if (!fileName.isEmpty()) {
+    QImage     img (pw->width(), pw->height(), QImage::Format_ARGB32_Premultiplied);
+    QPainter   painter(&img);
+    pw->render (&painter);
+    img.save   (fileName, "png", 0);
+  }
+}
+void MainWindow::SaveSettings(bool) {
+  qDebug ("Save Settings");
+  QSettings setting ("Kizarm", "Scope");
+  setting.beginGroup("Trigger");
+  const TrigerSettings * const ts = firmware.getTrigger();
+  setting.setValue("Value",   ts->value);
+  setting.setValue("Offset",  ts->offset);
+  setting.setValue("Mode",    ts->mode);
+  setting.setValue("Channel", ts->channel);
+  setting.setValue("Edge",    ts->rising);
+  setting.endGroup();
+  setting.beginGroup("Markers");
+  ui->Display->saveSettings (setting);
+  setting.endGroup();
+}
+void MainWindow::RestSettings(bool) {
+  qDebug ("Restore Settings");
+  QSettings setting ("Kizarm", "Scope");
+  setting.beginGroup("Trigger");
+  TrigerSettings ts;
+  ts.value   = setting.value ("Value").toInt();
+  ts.offset  = setting.value ("Offset").toInt();
+  ts.mode    = static_cast<TRIGER_MODE>  (setting.value ("Mode").toInt());
+  ui->comboMode->setCurrentIndex(ts.mode);
+  ts.channel = static_cast<ADC_CHANNELS> (setting.value ("Channel").toInt());
+  ui->comboChannel->setCurrentIndex(ts.channel);
+  ts.rising  = setting.value ("Edge").toBool();
+  ui->comboRissing->setCurrentIndex(ts.value ? 1 : 0);
+  memcpy (firmware.getTrigger(), & ts, sizeof(TrigerSettings));
+  setting.endGroup();
+  
+  SendTrigerMode (ts.mode);
+  firmware.SettingChanged(MOVE_VALUE);
+  firmware.SettingChanged(MOVE_OFSET);
+  
+  setting.beginGroup("Markers");
+  ui->Display->restSettings (setting);
+  const int n = setting.value("TimeBaseIndex").toInt();
+  TimeBaseRange(n);
+  ui->comboTimeRange->setCurrentIndex(n);
+  setting.endGroup();
+}
+
diff --git a/V203/usb/scope/software/mainwindow.h b/V203/usb/scope/software/mainwindow.h
new file mode 100644
index 0000000..ebaaade
--- /dev/null
+++ b/V203/usb/scope/software/mainwindow.h
@@ -0,0 +1,33 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include "datasource.h"
+
+class Ui_MainWindow;
+
+class MainWindow : public QMainWindow {
+    Q_OBJECT
+
+public:
+    MainWindow  (QWidget *parent = 0);
+    ~MainWindow ();
+protected:
+public slots:
+    void SendTrigerMode (int n);
+    void SendTrigerEdge (int n);
+    void SendTrigerChan (int n);
+    void TriggerValues  (int n);
+    void TimeBaseRange  (int n);
+    void ExportImage    (bool);
+    void MarkerChanged  (bool);
+    void SaveSettings   (bool);
+    void RestSettings   (bool);
+    void PaketTriggered ();
+    void Started        ();
+private:
+    Ui_MainWindow * ui;
+    DataSource      firmware;
+};
+
+#endif // MAINWINDOW_H
diff --git a/V203/usb/scope/software/mainwindow.ui b/V203/usb/scope/software/mainwindow.ui
new file mode 100644
index 0000000..c3b8536
--- /dev/null
+++ b/V203/usb/scope/software/mainwindow.ui
@@ -0,0 +1,238 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>966</width>
+    <height>660</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QGridLayout" name="gridLayout_4">
+    <property name="leftMargin">
+     <number>0</number>
+    </property>
+    <property name="topMargin">
+     <number>0</number>
+    </property>
+    <property name="rightMargin">
+     <number>0</number>
+    </property>
+    <property name="bottomMargin">
+     <number>0</number>
+    </property>
+    <property name="spacing">
+     <number>0</number>
+    </property>
+    <item row="0" column="0">
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="DisplayWidget" name="Display" native="true">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <layout class="QVBoxLayout" name="verticalLayout">
+        <item>
+         <widget class="QGroupBox" name="groupTriger">
+          <property name="title">
+           <string>Trigger</string>
+          </property>
+          <layout class="QGridLayout" name="gridLayout">
+           <item row="2" column="0">
+            <widget class="QComboBox" name="comboRissing"/>
+           </item>
+           <item row="1" column="0">
+            <widget class="QComboBox" name="comboMode"/>
+           </item>
+           <item row="0" column="0">
+            <widget class="QComboBox" name="comboChannel"/>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <widget class="QGroupBox" name="groupBase">
+          <property name="title">
+           <string>Time Base</string>
+          </property>
+          <layout class="QGridLayout" name="gridLayout_2">
+           <item row="0" column="0">
+            <widget class="QComboBox" name="comboTimeRange"/>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <spacer name="verticalSpacer">
+          <property name="orientation">
+           <enum>Qt::Vertical</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>20</width>
+            <height>40</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+        <item>
+         <widget class="QGroupBox" name="groupMarkers">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="minimumSize">
+           <size>
+            <width>121</width>
+            <height>61</height>
+           </size>
+          </property>
+          <property name="title">
+           <string>Markers</string>
+          </property>
+          <widget class="QWidget" name="layoutWidget">
+           <property name="geometry">
+            <rect>
+             <x>10</x>
+             <y>30</y>
+             <width>106</width>
+             <height>25</height>
+            </rect>
+           </property>
+           <layout class="QGridLayout" name="gridLayout_3">
+            <property name="sizeConstraint">
+             <enum>QLayout::SetMinimumSize</enum>
+            </property>
+            <property name="spacing">
+             <number>0</number>
+            </property>
+            <item row="0" column="0">
+             <widget class="QRadioButton" name="radio_a">
+              <property name="text">
+               <string/>
+              </property>
+              <property name="icon">
+               <iconset resource="src.qrc">
+                <normaloff>:/time</normaloff>:/time</iconset>
+              </property>
+             </widget>
+            </item>
+            <item row="0" column="1">
+             <widget class="QRadioButton" name="radio_b">
+              <property name="text">
+               <string/>
+              </property>
+              <property name="icon">
+               <iconset resource="src.qrc">
+                <normaloff>:/volt</normaloff>:/volt</iconset>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </widget>
+         </widget>
+        </item>
+        <item>
+         <widget class="QLabel" name="labelA">
+          <property name="text">
+           <string>Item to move:</string>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QComboBox" name="comboValue"/>
+        </item>
+        <item>
+         <widget class="QPushButton" name="buttonStart">
+          <property name="text">
+           <string>Start</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>966</width>
+     <height>22</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuMenu">
+    <property name="title">
+     <string>Menu</string>
+    </property>
+    <addaction name="actionQuit"/>
+    <addaction name="actionExport_Image"/>
+    <addaction name="actionSaveSet"/>
+    <addaction name="actionRestSet"/>
+   </widget>
+   <addaction name="menuMenu"/>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+  <action name="actionQuit">
+   <property name="text">
+    <string>Quit</string>
+   </property>
+   <property name="shortcut">
+    <string>Alt+X</string>
+   </property>
+  </action>
+  <action name="actionExport_Image">
+   <property name="text">
+    <string>Export Image</string>
+   </property>
+  </action>
+  <action name="actionSaveSet">
+   <property name="text">
+    <string>Save Settings</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+S</string>
+   </property>
+  </action>
+  <action name="actionRestSet">
+   <property name="text">
+    <string>Restore Settings</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+R</string>
+   </property>
+  </action>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>DisplayWidget</class>
+   <extends>QWidget</extends>
+   <header location="global">displaywidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources>
+  <include location="src.qrc"/>
+ </resources>
+ <connections/>
+</ui>
diff --git a/V203/usb/scope/software/src.pro b/V203/usb/scope/software/src.pro
new file mode 100644
index 0000000..c1d842b
--- /dev/null
+++ b/V203/usb/scope/software/src.pro
@@ -0,0 +1,41 @@
+#CONFIG  += qt debug
+QT += core gui
+QT += serialport
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets printsupport
+QMAKE_CXXFLAGS += -std=c++14
+
+TARGET   = osciloscope
+TEMPLATE = app
+
+
+SOURCES  = main.cpp
+SOURCES += mainwindow.cpp
+SOURCES += helpers.cpp
+SOURCES += datasource.cpp
+SOURCES += displaywidget.cpp
+
+HEADERS  = mainwindow.h
+HEADERS += helpers.h
+HEADERS += datasource.h
+HEADERS += structures.h
+HEADERS += displaywidget.h
+
+FORMS    = mainwindow.ui
+
+#INCLUDEPATH += 
+#LIBS        += 
+RESOURCES   += src.qrc
+
+MOC_DIR     = moc
+OBJECTS_DIR = obj
+DESTDIR     = ../bin
+
+unix {
+    DEFINES    += UNIX
+}
+
+win32 {
+    DEFINES    += QT_DLL WIN32
+}
+
+
diff --git a/V203/usb/scope/software/src.qrc b/V203/usb/scope/software/src.qrc
new file mode 100644
index 0000000..7038ae3
--- /dev/null
+++ b/V203/usb/scope/software/src.qrc
@@ -0,0 +1,8 @@
+<!DOCTYPE RCC>
+ <RCC version="1.0">
+    <qresource prefix="/" >
+      <file alias="ico">ico.png</file>
+      <file alias="time">time.png</file>
+      <file alias="volt">volt.png</file>
+    </qresource>
+ </RCC>
diff --git a/V203/usb/scope/software/structures.h b/V203/usb/scope/software/structures.h
new file mode 120000
index 0000000..693584d
--- /dev/null
+++ b/V203/usb/scope/software/structures.h
@@ -0,0 +1 @@
+../firmware/structures.h
\ No newline at end of file
diff --git a/V203/usb/scope/software/time.png b/V203/usb/scope/software/time.png
new file mode 100644
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