stm8s003设置定时器之后无法进入外部中断

Taichi · 发表于 2019-11-23 16:39:11

stm8s003设置定时器之后无法进入外部中断

如果加入定时器设置就无法进入外部中断函数，不设定时器则可以进入外部中断

void KEY_S2_Config(void)
{
disableInterrupts();

/* Initialize I/Os in Output Mode */
GPIO_Init(PR2CLR_INT_GPIO_PORT, (GPIO_Pin_TypeDef)PR2CLR_INT_PIN, GPIO_MODE_IN_PU_IT);

   /* Initialize the Interrupt sensitivity */
  EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOB, EXTI_SENSITIVITY_FALL_LOW);
  EXTI_SetTLISensitivity(EXTI_TLISENSITIVITY_FALL_ONLY);

ITC_SetSoftwarePriority(ITC_IRQ_PORTC,ITC_PRIORITYLEVEL_2);
enableInterrupts();
}

外部中断设置函数

void TIM4_Config(void)
{
// disableInterrupts();
  /* TIM4 configuration:
- TIM4CLK is set to 16 MHz, the TIM4 Prescaler is equal to 128 so the TIM1 counter
clock used is 16 MHz / 128 = 125 000 Hz
  - With 125 000 Hz we can generate time base:
   max time base is 2.048 ms if TIM4_PERIOD = 255 --> (255 + 1) / 125000 = 2.048 ms
   min time base is 0.016 ms if TIM4_PERIOD = 1 --> (  1 + 1) / 125000 = 0.016 ms
  - In this example we need to generate a time base equal to 1 ms
so TIM4_PERIOD = (0.001 * 125000 - 1) = 124 */

  /* Time base configuration */
  TIM4_TimeBaseInit(TIM4_PRESCALER_128, TIM4_PERIOD);
  /* Clear TIM4 update flag */
  TIM4_ClearFlag(TIM4_FLAG_UPDATE);
  /* Enable update interrupt */
  TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);

  /* enable interrupts */
  enableInterrupts();

  /* Enable TIM4 */
  TIM4_Cmd(ENABLE);
}
TIM4定时器中断设置

这怎么回事啊？