RT-Thread_env没有PWM2 CH2如何配置CH2

发布于 2019-02-15 14:40:05 浏览：2055 订阅该版

#define PWM_DEV_NAME        "pwm2"  /* PWM设备名称 */
#define PWM_DEV_CHANNEL2     2       /* PWM通道 */
#define PWM_DEV_CHANNEL3     3       /* PWM通道 */
#define PWM_DEV_CHANNEL4     4       /* PWM通道 */

struct rt_device_pwm *pwm_dev;      /* PWM设备句柄 */

static void speex_thread_entry(void* parameter)
{
 rt_uint32_t period, pulse;
 period = 500000000;    /* 周期为0.5ms，单位为纳秒ns */
 pulse =  300000000;    /* PWM脉冲宽度值，单位为纳秒ns */
        
 pwm_dev = (struct rt_device_pwm *)rt_device_find(PWM_DEV_NAME); /* 查找设备 */
 if (pwm_dev == RT_NULL) 
  rt_kprintf("驱动失败 %s <br>", PWM_DEV_NAME); 
 else
 { 
  rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL2, period, pulse);   /* 设置PWM周期和脉冲宽度默认值 */ 
  rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL2);               /* 使能设备 */
                
  rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL3, period, pulse);    
  rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL3); 
                
  rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL4, period, pulse);   
  rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL4);
  rt_kprintf("驱动成功 %s <br>", PWM_DEV_NAME);
 }
while(1);
}

![RT-Thread_env里面没有 ，所以手动添加了.png](/uploads/201902/15/143454xghxi5kakl5fagw5.png)

RT-Thread_env里面没有 ，所以手动添加了
#define BSP_USING_PWM2_CH3 
#define BSP_USING_PWM2_CH2

文件  rtconfig.h现在是这个样子
/* On-chip Peripheral Drivers */
#define BSP_USING_GPIO
#define BSP_USING_UART
#define BSP_USING_UART1
#define BSP_USING_TIM
#define BSP_USING_TIM11
#define BSP_USING_PWM
#define BSP_USING_PWM2
#define BSP_USING_PWM2_CH4 
#define BSP_USING_PWM2_CH3 //手动添加的
#define BSP_USING_PWM2_CH2//手动添加的
#define BSP_USING_ADC
#define BSP_USING_ADC1

现在只有CH4可以工作。
对这个驱动还没搞太明白，还有哪里需要改动？

10 个回答

misonyo 2019-02-15

这家伙很懒，什么也没写！

q80351951 2019-02-15

这家伙很懒，什么也没写！

yqiu 2019-02-16

这家伙很懒，什么也没写！

我夏了夏天 认证专家 2019-02-16

Life isn't about finding yourself, life is about creating yourself.

风来吴山 2019-02-16

这家伙很懒，什么也没写！

q80351951 2019-02-18

这家伙很懒，什么也没写！

>这一步做了吗？
>
>首先使能 internal Clock 时钟，然后为 channelx 选项选择PWM Generation CHx， 最后配置 ...

---

多谢各路神仙，还是没搞明白。

rtconfig.h文件下面定义已经存在
#define BSP_USING_PWM
#define BSP_USING_PWM2
#define BSP_USING_PWM2_CH4
#define BSP_USING_PWM2_CH3
#define BSP_USING_PWM2_CH2

drv_pwm.c文件也有这三个定义且有效

static void pwm_get_channel(void)
{
#ifdef BSP_USING_PWM2_CH1
    stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 0;
#endif
#ifdef BSP_USING_PWM2_CH4
    stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 3;
#endif
#ifdef BSP_USING_PWM2_CH3
    stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 2;
#endif
#ifdef BSP_USING_PWM2_CH2
    stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 1;
#endif
#ifdef BSP_USING_PWM3_CH1
    stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 0;
#endif
#ifdef BSP_USING_PWM3_CH2
    stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 1;
#endif
#ifdef BSP_USING_PWM3_CH3
    stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 2;
#endif
#ifdef BSP_USING_PWM3_CH4
    stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 3;
#endif
#ifdef BSP_USING_PWM4_CH2
    stm32_pwm_obj[PWM4_INDEX].channel |= 1 << 1;
#endif
#ifdef BSP_USING_PWM4_CH3
    stm32_pwm_obj[PWM4_INDEX].channel |= 1 << 2;
#endif
#ifdef BSP_USING_PWM5_CH1
    stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 1;
#endif
#ifdef BSP_USING_PWM5_CH2
    stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 2;
#endif
#ifdef BSP_USING_PWM5_CH3
    stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 3;
#endif
}

既然CH4正常是不是就说明“internal Clock 时钟”已经使能？
下面红色代码是不是就是“为 channelx 选项选择PWM Generation CHx”？
“ 最后配置所需要的引脚”这点找不到头绪，
static rt_err_t stm32_hw_pwm_init(struct stm32_pwm *device)
{
    rt_err_t result = RT_EOK;
    TIM_HandleTypeDef *tim = RT_NULL;
    TIM_OC_InitTypeDef oc_config = {0};
    TIM_MasterConfigTypeDef master_config = {0};
    TIM_ClockConfigTypeDef clock_config = {0};
    RT_ASSERT(device != RT_NULL);
    tim = (TIM_HandleTypeDef *)&device->tim_handle;
    /* configure the timer to pwm mode */
    tim->Init.Prescaler = 0;
    tim->Init.CounterMode = TIM_COUNTERMODE_UP;
    tim->Init.Period = 0;
    tim->Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
#if defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32L4)
    tim->Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
#endif
    if (HAL_TIM_Base_Init(tim) != HAL_OK)
    {
        LOG_E("%s time base init failed", device->name);
        result = -RT_ERROR;
        goto __exit;
    }
    clock_config.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    if (HAL_TIM_ConfigClockSource(tim, &clock_config) != HAL_OK)
    {
        LOG_E("%s clock init failed", device->name);
        result = -RT_ERROR;
        goto __exit;
    }
    if (HAL_TIM_PWM_Init(tim) != HAL_OK)
    {
        LOG_E("%s pwm init failed", device->name);
        result = -RT_ERROR;
        goto __exit;
    }
    master_config.MasterOutputTrigger = TIM_TRGO_RESET;
    master_config.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(tim, &master_config) != HAL_OK)
    {
        LOG_E("%s master config failed", device->name);
        result = -RT_ERROR;
        goto __exit;
    }
    oc_config.OCMode = TIM_OCMODE_PWM1;
    oc_config.Pulse = 0;
    oc_config.OCPolarity = TIM_OCPOLARITY_HIGH;
    oc_config.OCFastMode = TIM_OCFAST_DISABLE;
    /* config pwm channel */
    if (device->channel & 0x01)
    {
        if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_1) != HAL_OK)
        {
            LOG_E("%s channel1 config failed", device->name);
            result = -RT_ERROR;
            goto __exit;
        }
    }
    if (device->channel & 0x02)
    {
        if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_2) != HAL_OK)
        {
            LOG_E("%s channel2 config failed", device->name);
            result = -RT_ERROR;
            goto __exit;
        }
    }
    if (device->channel & 0x04)
    {
        if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_3) != HAL_OK)
        {
            LOG_E("%s channel3 config failed", device->name);
            result = -RT_ERROR;
            goto __exit;
        }
    }
    if (device->channel & 0x08)
    {
        if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_4) != HAL_OK)
        {
            LOG_E("%s channel4 config failed", device->name);
            result = -RT_ERROR;
            goto __exit;
        }
    }
    /* pwm pin configuration */
    HAL_TIM_MspPostInit(tim);
    /* enable update request source */
    __HAL_TIM_URS_ENABLE(tim);
__exit:
    return result;
}

来一颗糖 2019-02-18

这家伙很懒，什么也没写！

q80351951 2019-02-18

这家伙很懒，什么也没写！

>这里面填对了嘛

---

多谢启发，搞定了。
\board\CubeMX_Config\Src\stm32f4xx_hal_msp.c文件里面才是引脚功能初始化，折腾了半天其实就这一个问题。
void HAL_TIM_MspPostInit(TIM_HandleTypeDef* htim)
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(htim->Instance==TIM2)
  {
  /* USER CODE BEGIN TIM2_MspPostInit 0 */

/* USER CODE END TIM2_MspPostInit 0 */
  
    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**TIM2 GPIO Configuration    
    PA3     ------> TIM2_CH4 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_3;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* USER CODE BEGIN TIM2_MspPostInit 1 */

/* USER CODE END TIM2_MspPostInit 1 */
  }
增加了2个ok