CH582 CH592 CH573 中断使用注意事项

/*******************************************************************************
 * @fn      PFIC_EnableIRQ
 *
 * @brief   Enable Interrupt
 *
 * @param   IRQn    - Interrupt Numbers
 */
RV_STATIC_INLINE void PFIC_EnableIRQ(IRQn_Type IRQn)
{
    PFIC->IENR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn)&0x1F));
}

PFIC_EnableIRQ(GPIO_A_IRQn);

            PFIC_EnableIRQ(GPIO_A_IRQn); //GPIOA 中断开启
            PFIC_EnableIRQ(RTC_IRQn); //开启RTC中断

/*******************************************************************************
 * @fn      PFIC_DisableIRQ
 *
 * @brief   Disable Interrupt
 *
 * @param   IRQn    - Interrupt Numbers
 */
RV_STATIC_INLINE void PFIC_DisableIRQ(IRQn_Type IRQn)
{
    PFIC->IRER[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn)&0x1F));
    __nop();
    __nop();
}

            PFIC_DisableIRQ(GPIO_A_IRQn); //关闭GPIOA中断
            PFIC_DisableIRQ(RTC_IRQn);//关闭RTC中断

/*********************************************************************
 * @fn      SYS_DisableAllIrq
 *
 * @brief   关闭所有中断，并保留当前中断值
 *
 * @param   pirqv   - 当前保留中断值
 *
 * @return  none
 */
void SYS_DisableAllIrq(uint32_t *pirqv)
{
    *pirqv = (PFIC->ISR[0] >> 8) | (PFIC->ISR[1] << 24);
    PFIC->IRER[0] = 0xffffffff;
    PFIC->IRER[1] = 0xffffffff;
}

/*********************************************************************
 * @fn      SYS_RecoverIrq
 *
 * @brief   恢复之前关闭的中断值
 *
 * @param   irq_status  - 当前保留中断值
 *
 * @return  none
 */
void SYS_RecoverIrq(uint32_t irq_status)
{
    PFIC->IENR[0] = (irq_status << 8);
    PFIC->IENR[1] = (irq_status >> 24);
}

#define PFIC_EnableAllIRQ()     write_csr(0x800, 0x88)
#define PFIC_DisableAllIRQ()    write_csr(0x800, 0x80)

GPIOA_ModeCfg(GPIO_Pin_5, GPIO_ModeIN_PU);
GPIOA_ITModeCfg(GPIO_Pin_5, GPIO_ITMode_FallEdge); // 下降沿唤醒
PFIC_EnableIRQ(GPIO_A_IRQn);

__INTERRUPT
__HIGH_CODE
void GPIOA_IRQHandler(void)
{
GPIOA_ClearITFlagBit(GPIO_Pin_6 | GPIO_Pin_5);
PRINT("GPIO——A ");
}