原子阿波罗STM32F7使用HAL库定时器怎么设置外部计数模式

陆闲鹏 · 发表于 2017-7-31 13:55:32

弄了好几天，都没有头绪，而且看数据手册上面，发现有好多TIM2_ETR管脚，到底用那个管脚呢，下面贴下代码，看看哪里配置不得
void TIM2_Init(u16 arr,u16 psc)
{

TIM_ClockConfigTypeDef sClockSoureConfig;
sClockSoureConfig.ClockSource=TIM_CLOCKSOURCE_ETRMODE2;
sClockSoureConfig.ClockPrescaler=TIM_CLOCKPRESCALER_DIV1;
sClockSoureConfig.ClockPolarity=TIM_CLOCKPOLARITY_RISING;
sClockSoureConfig.ClockFilter=0;

TIM2_Handler.Instance=TIM1;
TIM2_Handler.Init.Prescaler=psc;
TIM2_Handler.Init.CounterMode=TIM_COUNTERMODE_UP;
TIM2_Handler.Init.Period=0xffffffff;
TIM2_Handler.Init.ClockDivision=TIM_CLOCKDIVISION_DIV1;

HAL_TIM_ConfigClockSource(&TIM2_Handler,&sClockSoureConfig);
HAL_TIM_Base_Init(&TIM2_Handler);

}

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)
{
GPIO_InitTypeDef GPIO_Initure;

      if(htim->Instance==TIM2)
{

__HAL_RCC_GPIOA_CLK_ENABLE(); //¿aÆôGPIOAê±Öó
__HAL_RCC_TIM2_CLK_ENABLE();

         GPIO_Initure.Pin=GPIO_PIN_5;          //PA5
         GPIO_Initure.Mode=GPIO_MODE_INPUT;    //¸¡¿Õêäèë
         GPIO_Initure.Speed=GPIO_SPEED_HIGH;    //¸ßËù
GPIO_Initure.Alternate=GPIO_AF1_TIM2; //PA0¸′óÃÎaTIM5í¨μà1
         HAL_GPIO_Init(GPIOA,&GPIO_Initure);

GPIO_Initure.Pin=GPIO_PIN_0;          //PA0
GPIO_Initure.Mode=GPIO_MODE_INPUT;    //¸′óÃíÆíìêä3ö
GPIO_Initure.Speed=GPIO_SPEED_HIGH;    //¸ßËù
GPIO_Initure.Alternate=GPIO_AF1_TIM2; //PA0¸′óÃÎaTIM5í¨μà1
HAL_GPIO_Init(GPIOA,&GPIO_Initure);

HAL_NVIC_SetPriority(TIM2_IRQn,2,3); //éèÖÃÖD¶ÏóÅÏè¼¶￡¬ÇàÕ¼óÅÏè¼¶1￡¬×óóÅÏè¼¶3
HAL_NVIC_EnableIRQ(TIM2_IRQn);       //¿aÆôITM3ÖD¶Ï
}
}