74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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#ifndef SYSTEM_H
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#define SYSTEM_H
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#include "CH32V00xxx.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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};
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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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uint32_t UNUSED0 : 27; //!<[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;
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__IO uint32_t SR;
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__IO uint32_t CNT;
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uint32_t RESERVED0;
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__IO uint32_t CMP;
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uint32_t RESERVED1;
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void Config (const uint32_t ticks) {
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CNT = 0u;
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CMP = ticks - 1u;
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CTLR.modify ([] (CTLR_DEF & r) -> auto {
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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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SysTick_Type & SysTick = * reinterpret_cast<SysTick_Type * const> (0xE000F000);
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#endif // SYSTEM_H
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