91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
#ifndef SYSTEM_H
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#define SYSTEM_H
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#include "CH32V20xxx.h"
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struct NVIC_Type {
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__I uint32_t ISR[8];
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__I uint32_t IPR[8];
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__IO uint32_t ITHRESDR;
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__IO uint32_t RESERVED;
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__IO uint32_t CFGR;
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__I uint32_t GISR;
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__IO uint8_t VTFIDR[4];
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uint8_t RESERVED0[12];
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__IO uint32_t VTFADDR[4];
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uint8_t RESERVED1[0x90];
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__O uint32_t IENR[8];
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uint8_t RESERVED2[0x60];
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__O uint32_t IRER[8];
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uint8_t RESERVED3[0x60];
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__O uint32_t IPSR[8];
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uint8_t RESERVED4[0x60];
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__O uint32_t IPRR[8];
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uint8_t RESERVED5[0x60];
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__IO uint32_t IACTR[8];
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uint8_t RESERVED6[0xE0];
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__IO uint8_t IPRIOR[256];
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uint8_t RESERVED7[0x810];
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__IO uint32_t SCTLR;
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void EnableIRQ (IRQn IRQ) {
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IENR [((uint32_t)(IRQ) >> 5)] = (1 << ((uint32_t)(IRQ) & 0x1F));
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}
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void DisableIRQ (IRQn IRQ) {
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IRER [((uint32_t)(IRQ) >> 5)] = (1 << ((uint32_t)(IRQ) & 0x1F));
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}
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void SetPriority(IRQn IRQ, uint8_t priority) {
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IPRIOR[(uint32_t)(IRQ)] = priority;
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}
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};
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static NVIC_Type & NVIC = * reinterpret_cast<NVIC_Type * const> (0xE000E000);
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struct SysTick_Type {
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union CTLR_DEF {
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struct {
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__IO ONE_BIT STE : 1; //!<[00] System counter enable
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__IO ONE_BIT STIE : 1; //!<[01] System counter interrupt enable
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__IO ONE_BIT STCLK : 1; //!<[02] System selects the clock source
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__IO ONE_BIT STRE : 1; //!<[03] System reload register
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__IO ONE_BIT MODE : 1; //!<[04] System Mode
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__IO ONE_BIT INIT : 1; //!<[05] System Initialization update
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uint32_t UNUSED0 : 25; //!<[06]
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__IO ONE_BIT SWIE : 1; //!<[31] System software triggered interrupts enable
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} B;
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__IO uint32_t R;
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template<typename F> void modify (F f) volatile {
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CTLR_DEF r; r.R = R;
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R = f (r);
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}
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};
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__IO CTLR_DEF CTLR ; //!< [1000](04)[0x00000000]
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__IO uint32_t SR ; //!< [1004](04)[0x00000000]
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__IO uint32_t CNTL ; //!< [1008](04)[0x00000000]
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__IO uint32_t CNTH ; //!< [100c](04)[0x00000000]
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__IO uint32_t CMPLR ; //!< [1010](04)[0x00000000]
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__IO uint32_t CMPHR ; //!< [1014](04)[0x00000000]
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void Config (const uint32_t ticks) {
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CNTL = 0u;
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CNTH = 0u;
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CMPLR = ticks - 1u;
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CMPHR = 0u;
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CTLR.modify ([] (CTLR_DEF & r) -> auto { // TODO ???
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r.B.STE = SET;
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r.B.STIE = SET;
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r.B.STCLK = SET;
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r.B.STRE = SET;
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return r.R;
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});
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NVIC.EnableIRQ (SysTicK_IRQn);
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}
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};
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static SysTick_Type & SysTick = * reinterpret_cast<SysTick_Type * const> (0xE000F000);
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static constexpr unsigned SYSTEM_CORE_CLOCK = 96'000'000u;
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extern "C" {
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extern uint32_t SystemCoreClock;
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extern void SystemCoreClockUpdate (void);
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extern void SystemInit(void);
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extern void delay_init ();
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extern void delay_us (const unsigned dly);
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};
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#endif // SYSTEM_H
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