STM32F030K6的TIM3定时器可否捕捉两路PWM输入

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xieweibiao 提问时间：2015-10-18 18:00 /

已经调试了一整天发现CH1和CH2可以捕捉一路信号，但是CH3和CH4怎么调试都没有数值，度娘中有说可以，有些又说不能，求解答

赞收藏评论5 发布时间：2015-10-18 18:00

5个回答

你好我好大家好！回答时间：2015-10-18 18:17:47

看参考手册比问谁都权威

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xieweibiao 回答时间：2015-10-18 18:50:55

我就是看着手册来写程序的，结果CH3和CH4的值一动不动的，手册上应该是支持的

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lkl0305 回答时间：2015-10-18 20:54:04

手册上说的一般不会错的，楼主先找个例子测试一下

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刚声打火机回答时间：2015-10-19 09:02:40

本帖最后由刚声打火机于 2015-10-19 09:11 编辑

两路都是可以捕获的哈
我公司产品中有实际应用
给你贴上源码可以参考一下

#define TIM1_PRESCALER       2

typedef void (*tim1_cc_irq_t)(void);

/* 使能TIM1 */
#define START_TIM1() \
      do {\
            RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);\
            TIM_Cmd(TIM1, ENABLE);\
      } while (0);

/* 停止TIM1 */
#define STOP_TIM1() \
      do {\
            TIM_Cmd(TIM1, DISABLE);\
            RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, DISABLE);\
      } while (0);

void bsp_tim1_init(void);

void tim1_ch3_set_irq_callback(tim1_cc_irq_t func);
void tim1_ch4_set_irq_callback(tim1_cc_irq_t func);

static tim1_cc_irq_t __tim1_cc3_irq = NULL;
static tim1_cc_irq_t __tim1_cc4_irq = NULL;

/* +------------------------------------------+ *
*  |                   TIM1初始化             | *
* +------------------------------------------+ */
void bsp_tim1_init(void)
{
      TIM_ICInitTypeDef TIM_ICInitStructure;
      TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

      /* TIM1 clock enable */
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

      /* TIM1 CC CH3 */
      bsp_gpio_init(GPIOA,
                              GPIO_Pin_10,
                              GPIO_Mode_AF,
                              GPIO_Speed_50MHz,
                              GPIO_OType_PP,
                              GPIO_PuPd_UP);

      /* TIM1 CC CH4 */
      bsp_gpio_init(GPIOA,
                              GPIO_Pin_11,
                              GPIO_Mode_AF,
                              GPIO_Speed_50MHz,
                              GPIO_OType_PP,
                              GPIO_PuPd_UP);

      /* Connect TIM pins to AF2 */
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_2);
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_2);

      TIM_TimeBaseStructure.TIM_Period = 0xFFFFFFFF;
/* 累计 TIM_Period个频率后产生一个更新或者中断 */
TIM_TimeBaseStructure.TIM_Prescaler = TIM1_PRESCALER - 1;             // 24M
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;                // 采样分频
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;    // 向上计数模式
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

      TIM_ICInitStructure.TIM_Channel = TIM_Channel_3;
      TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
      TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
      TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
      TIM_ICInitStructure.TIM_ICFilter = 0x0;
      TIM_ICInit(TIM1, &TIM_ICInitStructure);

      TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;
      TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
      TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
      TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;

      TIM_ICInitStructure.TIM_ICFilter = 0x0;
      TIM_ICInit(TIM1, &TIM_ICInitStructure);

      TIM_Cmd(TIM1, ENABLE);

      TIM_ITConfig(TIM1, TIM_IT_CC3, ENABLE);
      TIM_ITConfig(TIM1, TIM_IT_CC4, ENABLE);

      nvic_config(TIM1_CC_IRQn, TIM1_CC_PRIOR, ENABLE);
}

/* +------------------------------------------+ *
* |       TIM1 CH3  初始化回调函数 | *
* +------------------------------------------+ */
void tim1_ch3_set_irq_callback(tim1_cc_irq_t func)
{
      __tim1_cc3_irq = func;
}

/* +------------------------------------------+ *
* |       TIM1 CH4  初始化回调函数 | *
* +------------------------------------------+ */
void tim1_ch4_set_irq_callback(tim1_cc_irq_t func)
{
      __tim1_cc4_irq = func;
}

/* +------------------------------------------+ *
* |                TIM1 CC 中断                | *
* +------------------------------------------+ */
void TIM1_CC_IRQHandler(void)
{
      if (TIM_GetITStatus(TIM1, TIM_IT_CC3) == SET) {
            TIM_ClearITPendingBit(TIM1, TIM_IT_CC3);
            if (NULL != __tim1_cc3_irq) {
                     (__tim1_cc3_irq)();
            }
      }

      if (TIM_GetITStatus(TIM1, TIM_IT_CC4) == SET) {
            TIM_ClearITPendingBit(TIM1, TIM_IT_CC4);
            if (NULL != __tim1_cc4_irq) {
                     (__tim1_cc4_irq)();
            }
      }
}

补充一下：
bsp_gpio_init（）这个函数我自己封装过，定义是这样的：
/* +------------------------------------------+ *
* |       封装了一层GPIO初始化函数    | *
* +------------------------------------------+ */

/* GPIO Group Periph Manager*/
typedef struct ggm_s {
GPIO_TypeDef *gpio_x;
u32 periph;
vu32 bit_map;
} ggpm_t;

static ggpm_t ggpm[MAX_GPIO_GROUP_NUM] = {
{GPIOA, RCC_AHBPeriph_GPIOA, 0x0},
{GPIOB, RCC_AHBPeriph_GPIOB, 0x0},
{GPIOC, RCC_AHBPeriph_GPIOC, 0x0},
{GPIOD, RCC_AHBPeriph_GPIOD, 0x0},
{GPIOE, RCC_AHBPeriph_GPIOE, 0x0},
{GPIOF, RCC_AHBPeriph_GPIOF, 0x0},
};

void bsp_gpio_init(GPIO_TypeDef *gpio_x, u32 gpio_pin, GPIOMode_TypeDef mode, GPIOSpeed_TypeDef speed, GPIOOType_TypeDef otype, GPIOPuPd_TypeDef pupd)
{
GPIO_InitTypeDef gpio_init_struct;
int i = 0;

for (i = 0; i < (sizeof(ggpm) / sizeof(ggpm_t)); i++) {
if (ggpm.gpio_x == gpio_x) {
if ( ! (ggpm.bit_map & GPIO_PIN_NUM_MASK) ) {
RCC_AHBPeriphClockCmd(ggpm.periph, ENABLE);
}

ggpm.bit_map |= gpio_pin;

gpio_init_struct.GPIO_Pin = gpio_pin;
gpio_init_struct.GPIO_Mode = mode;
gpio_init_struct.GPIO_Speed = speed;
gpio_init_struct.GPIO_OType = otype;
gpio_init_struct.GPIO_PuPd = pupd;

GPIO_Init(gpio_x, &gpio_init_struct);

break;
}
}

}