大伙请注意 GD32F103/105 定时器外部计数不能用，原厂确认过的

只看该作者 · 2017-12-13 18:36

本帖最后由 sqqdfny 于 2017-12-13 20:02 编辑

下面这个代码是在STM32上量产过的,在GD的芯片上，不能计数，咨询代理商，说是GD的不支持外部计数。有大神能指点一下么。
QQ：792739069 email:sqqdfny@163.com

static u32 _count[4] = {0,0,0,0};
//===================================================================
u16 GetExtCounter(u32 ch)
{
      if(ch > 3) return (0);
      return ((u16)_count[ch]);
}
//===================================================================
//在RTC 1Hz中断中调用,每秒调用一次
void ExtCounterHandler(void)
{
      _count[0] = TIM2->CNT; TIM2->CNT = 0;
      _count[1] = TIM3->CNT; TIM3->CNT = 0;
      _count[2] = TIM4->CNT; TIM4->CNT = 0;
      _count[3] = TIM5->CNT; TIM5->CNT = 0;
}
//===================================================================
void ExtCounterInit(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);

      //PA0 TIM2_CH1
      //PA1 TIM5_CH2
      //PA6 TIM3_CH1
      GPIO_InitStructure.GPIO_Mode       = GPIO_Mode_IPU;
      GPIO_InitStructure.GPIO_Pin       = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_6;
      GPIO_InitStructure.GPIO_Speed       = GPIO_Speed_10MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      //PB7 TIM4_CH2
      GPIO_InitStructure.GPIO_Mode       = GPIO_Mode_IPU;
      GPIO_InitStructure.GPIO_Pin       = GPIO_Pin_7;
      GPIO_InitStructure.GPIO_Speed       = GPIO_Speed_10MHz;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
      TIM2->CR1 = (1 << 8); //外部采样时钟  36M
      TIM2->CR2 = 0;
      TIM2->SMCR = (7) | (5 << 4);
      TIM2->CCMR1 = (1) | (7 << 4);  //上升沿计数,1分频, 1/4采样,8次采样确认一个脉冲
      TIM2->CCER = 0;
      TIM2->DIER = 0;          //关中断
      TIM2->CNT = 0;
      TIM2->CR1 |= BIT0;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
      TIM3->CR1 = (1 << 8); //外部采样时钟  36M
      TIM3->CR2 = 0;
      TIM3->SMCR = (7) | (5 << 4);
      TIM3->CCMR1 = (1) | (7 << 4);  //上升沿计数,1分频, 1/4采样,8次采样确认一个脉冲
      TIM3->CCER = 0;
      TIM3->DIER = 0;          //关中断
      TIM3->CNT = 0;
      TIM3->CR1 |= BIT0;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
      TIM4->CR1 = (1 << 8); //外部采样时钟  36M
      TIM4->CR2 = 0;
      TIM4->SMCR = (7) | (6 << 4);
      TIM4->CCMR1 = (1 << 8) | (7 << 12);  //上升沿计数,1分频, 1/4采样,8次采样确认一个脉冲
      TIM4->CCER = 0;
      TIM4->DIER = 0;          //关中断
      TIM4->CNT = 0;
      TIM4->CR1 |= BIT0;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
      TIM5->CR1 = (1 << 8); //外部采样时钟  36M
      TIM5->CR2 = 0;
      TIM5->SMCR = (7) | (6 << 4);
      TIM5->CCMR1 = (1 << 8) | (7 << 12);  //上升沿计数,1分频, 1/4采样,8次采样确认一个脉冲
      TIM5->CCER = 0;
      TIM5->DIER = 0;          //关中断
      TIM5->CNT = 0;
      TIM5->CR1 |= BIT0;
}