From 4a3aaa1a0e5fec49f6fbd54594d5757af5534229 Mon Sep 17 00:00:00 2001
From: Kizarm <mrazik@volny.cz>
Date: Sat, 9 Mar 2024 12:20:35 +0100
Subject: [PATCH] correct midi for stm32f051

---
 stm32f051/pcmdma.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/stm32f051/pcmdma.cpp b/stm32f051/pcmdma.cpp
index 9e6e38a..6118c02 100644
--- a/stm32f051/pcmdma.cpp
+++ b/stm32f051/pcmdma.cpp
@@ -31,6 +31,8 @@ static void Dma1Ch5Init (void * addr) {
 static PcmDma * PcmDmaInstance = nullptr;
 PcmDma::PcmDma() noexcept : pL(buffer), pH(buffer + HALF_LEN) {
   PcmDmaInstance = this;
+  const GpioClass de (GpioPortA, 12);
+  de << true;   // použitý hardware používá jako budič sluchátek 75176 (RS485), nutno vybavit
   for (unsigned n=0; n<FULL_LEN; n++) buffer[n] = MAXPWM >> 1;
   GpioClass pin1p (GpioPortA, 9, GPIO_Mode_AF);
   GpioClass pin1n (GpioPortB, 0, GPIO_Mode_AF);
@@ -57,7 +59,7 @@ PcmDma::PcmDma() noexcept : pL(buffer), pH(buffer + HALF_LEN) {
   });
   // Set Output, dead time
   TIM1.BDTR.modify([](TIM1_Type::BDTR_DEF & r) -> auto {
-    r.B.DTG  = 48u;    // dead: 1 us
+  //r.B.DTG  = 48u;    // dead: 1 us
     r.B.MOE  = SET;    // Main output enable
   //r.B.OSSR = 1u;     // Off-state selection for Run mode - TODO
     return r.R;