10 rtt3.1.2使用PWM在我开发板上跑不起来

发布于 2020-11-13 15:17:14 浏览：1386 订阅该版

{{stm32f407-ys-explorer - test.zip(uploading...)}}{{stm32f407-ys-explorer - test.zip(uploading...)}}![捕获.PNG](/uploads/20201113/d2f71cf50016af7db289806ac129bf72.png)
想请大家看看我配置的PWM哪里出现了问题{{stm32f407-ys-explorer - test.zip(uploading...)}}

#include "board.h"

extern void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);

TIM_HandleTypeDef htim3;
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
 
  __HAL_RCC_PWR_CLK_ENABLE();                                     //使能PWR时钟

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);  //设置调压器输出电压级别1

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;      // 外部晶振，8MHz
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;                        //打开HSE 
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;                    //打开PLL
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;            //PLL时钟源选择HSE
  RCC_OscInitStruct.PLL.PLLM = 8;                                 //8分频MHz
  RCC_OscInitStruct.PLL.PLLN = 336;                               //336倍频
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;                     //2分频，得到168MHz主时钟
  RCC_OscInitStruct.PLL.PLLQ = 7;                                 //USB/SDIO/随机数产生器等的主PLL分频系数
  HAL_RCC_OscConfig(&RCC_OscInitStruct);

RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;       // 系统时钟：168MHz
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;              // AHB时钟： 168MHz
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;               // APB1时钟：42MHz
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;               // APB2时钟：84MHz
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);

HAL_RCC_EnableCSS();                                            // 使能CSS功能，优先使用外部晶振，内部时钟源为备用
  
 	// HAL_RCC_GetHCLKFreq()/1000    1ms中断一次
	// HAL_RCC_GetHCLKFreq()/100000	 10us中断一次
	// HAL_RCC_GetHCLKFreq()/1000000 1us中断一次
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);                // 配置并启动系统滴答定时器
  /* 系统滴答定时器时钟源 */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

/* 系统滴答定时器中断优先级配置 */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

void MX_TIM3_Init(void)
{

TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;
  TIM_OC_InitTypeDef sConfigOC;

htim3.Instance = TIM3;
  htim3.Init.Prescaler = 0;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 0;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_PWM_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }

sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig);
	
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }

sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 0;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }

sConfigOC.Pulse = 0;
  if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }

HAL_TIM_MspPostInit(&htim3);

}

**#include <rtthread.h>**
#include <rtdevice.h>
#include <board.h>
	
#define PWM_DEV_NAME        "pwm3"  /* PWM设备名称 */
#define PWM_DEV_CHANNEL     1       /* PWM通道 */

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

static int pwm_led_sample(int argc, char *argv[])
{
    rt_uint32_t period, pulse;

period = 1000;    /* 周期为0.5ms，单位为纳秒ns */
                /* PWM脉冲宽度值的增减方向 */
    pulse = 500;          /* PWM脉冲宽度值，单位为纳秒ns */

/* 查找设备 */
    pwm_dev = (struct rt_device_pwm *)rt_device_find(PWM_DEV_NAME);
    if (pwm_dev == RT_NULL)
    {
        rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
        return RT_ERROR;
    }

/* 设置PWM周期和脉冲宽度默认值 */
    rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
    /* 使能设备 */
    rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);       
        /* 设置PWM周期和脉冲宽度 */
     rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
    
}

/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(pwm_led_sample, pwm sample);

2 个回答

富士山下_LJH 2020-11-13

这家伙很懒，什么也没写！

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{

if(htim_base->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM2_MspInit 0 */

/* USER CODE END TIM2_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_TIM3_CLK_ENABLE();
  /* USER CODE BEGIN TIM2_MspInit 1 */

/* USER CODE END TIM2_MspInit 1 */
  }
  else if(htim_base->Instance==TIM11)
  {
  /* USER CODE BEGIN TIM11_MspInit 0 */

/* USER CODE END TIM11_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_TIM11_CLK_ENABLE();
  /* USER CODE BEGIN TIM11_MspInit 1 */

/* USER CODE END TIM11_MspInit 1 */
  }
  else if(htim_base->Instance==TIM13)
  {
  /* USER CODE BEGIN TIM13_MspInit 0 */

/* USER CODE END TIM13_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_TIM13_CLK_ENABLE();
  /* USER CODE BEGIN TIM13_MspInit 1 */

/* USER CODE END TIM13_MspInit 1 */
  }
  else if(htim_base->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspInit 0 */

/* USER CODE END TIM14_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_TIM14_CLK_ENABLE();
  /* USER CODE BEGIN TIM14_MspInit 1 */

/* USER CODE END TIM14_MspInit 1 */
  }

}

void HAL_TIM_MspPostInit(TIM_HandleTypeDef* htim)
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(htim->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM3_MspPostInit 0 */

/* USER CODE END TIM3_MspPostInit 0 */
  
    __HAL_RCC_GPIOC_CLK_ENABLE();
    /**TIM3 GPIO Configuration    
    PC63     ------> TIM3_CH1 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_6;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/* USER CODE BEGIN TIM2_MspPostInit 1 */

/* USER CODE END TIM2_MspPostInit 1 */
  }

}
/**
* @brief TIM_Base MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param htim_base: TIM_Base handle pointer
* @retval None
*/

void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim_base)
{

if(htim_base->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM2_MspDeInit 0 */

/* USER CODE END TIM2_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_TIM3_CLK_DISABLE();
  /* USER CODE BEGIN TIM2_MspDeInit 1 */

/* USER CODE END TIM2_MspDeInit 1 */
  }
  else if(htim_base->Instance==TIM11)
  {
  /* USER CODE BEGIN TIM11_MspDeInit 0 */

/* USER CODE END TIM11_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_TIM11_CLK_DISABLE();
  /* USER CODE BEGIN TIM11_MspDeInit 1 */

/* USER CODE END TIM11_MspDeInit 1 */
  }
  else if(htim_base->Instance==TIM13)
  {
  /* USER CODE BEGIN TIM13_MspDeInit 0 */

/* USER CODE END TIM13_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_TIM13_CLK_DISABLE();
  /* USER CODE BEGIN TIM13_MspDeInit 1 */

/* USER CODE END TIM13_MspDeInit 1 */
  }
  else if(htim_base->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspDeInit 0 */

/* USER CODE END TIM14_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_TIM14_CLK_DISABLE();
  /* USER CODE BEGIN TIM14_MspDeInit 1 */

/* USER CODE END TIM14_MspDeInit 1 */
  }

}