外部中断触发，进入中断后，数据自加会出错？

huanglaihei · 发表于 2022-7-21 12:43:46

进入中断后，自加，竟然会出错？？
static volatile uint32_t pos_flow = 1;
static volatile uint32_t neg_flow = 1;

/**
* @brief  This function handles External lines interrupt request.
*/
void EXTI4_15_IRQHandler(void) {
// gpio_exti_callback();
// static volatile uint32_t pos_flow = 1;
// static volatile uint32_t neg_flow = 1;

static uint32_t k = 0x22;
static uint8_t new = 0, last = 0;
uint8_t flag = 0;

// DISABLE_INT();

/* C线 */
if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_4) != RESET) {
      hall_info.storage[hall_info.count++] |= EXTI_A;
      //       hall_info.reg |= EXTI_A;

      new = EXTI_A;
      flag = 1;
      __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_4);
}
/* B线 */
if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_5) != RESET) {
      hall_info.storage[hall_info.count++] |= EXTI_B;
      //       hall_info.reg |= EXTI_B;

      new = EXTI_B;
      flag = 1;
      __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_5);
}
/* A线 */
if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_6) != RESET) {
      hall_info.storage[hall_info.count++] |= EXTI_C;
      //       hall_info.reg |= EXTI_C;

      new = EXTI_C;
      flag = 1;
      __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_6);
}

if (flag) {
      if (last == 0) {
         last = new;
      } else {
         switch (new) {
         case EXTI_C:/* C */
            /* 正转 */
            if (last == EXTI_A) {
                  pos_flow++;
            }
            /* 反转 */
            if (last == EXTI_B) {
                  neg_flow++;
            }
            break;
         case EXTI_B:/* B */
            /* 正转 */
            if (last == EXTI_C) {
                  pos_flow++;
            }
            /* 反转 */
            if (last == EXTI_A) {
                  neg_flow++;
            }
            break;
         case EXTI_A:/* A */
            /* 正转 */
            if (last == EXTI_B) {
                  pos_flow++;
            }
            /* 反转 */
            if (last == EXTI_C) {
                  neg_flow++;
            }
            break;
         default:
            /* 错误 */
            hall_info.error += 1; /* 读取后才可以修改 */
            break;
         }
         last = new;
      }

//       hall_info.neg_flow = neg_flow;
//       hall_info.pos_flow = pos_flow;

//       __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

      printf("neg_flow:%u\r\n", neg_flow);
      printf("pos_flow:%u\r\n", pos_flow);

      printf("k:%u\r\n", k++);
}

// ENABLE_INT();
}