软件STM32cubeIDE下STM32F4xx使用32位定时器2（TIM2）用DMA+PWM点亮灯带WS2812-基础样例

  • （1）前言6
  • （2）环境
  • （3）问题细节
  • （4）解决思路
  • （5）代码链接
  • （6）代码说明
    • （1）配置细节
    • （2）代码细节
  • （7）后期验证
  • （8）后期补充-细节

（1）前言6

之前想使用STM32F4xx点亮灯带WS2812,在使用TIM2_ch1(PA0)点灯带2812的时候，发现按照网上资料或者查手册，都没办法点灯，同时测试了使用TIM3_ch1(PA6)的时候，发现能够正常点ws2812。这就奇怪了，同样的定时器，一个行一个就不行，一查才知道，F4上，tim2是32位的，tim3是16位的，就这点区别，但是多次尝试未果，后来问了大神吧，总算解决了，现在将这个问题解决办法记录下来，毕竟花我100RMB呢。

（2）环境

  • 软件环境：STM32cubeIDE 1.8.0
  • 硬件芯片：STM32F407ZGT6
  • HAL库版本：stm32cube_fw_f4_v1262

（3）问题细节

具体问题细节，请看下边链接，当时想要解决这个问题，特意花了钱悬赏，但是并没有解决。
以下是链接：https://ask.csdn.net/questions/7589282

（4）解决思路

和自己的想法一样，可以说TIM2和TIM3唯一区别就是tim2是32位定时器，tim3是16位寄存器，使用的时候需要注意。

TIM2的CCR寄存器是32位宽的，而TIM3的CCR寄存器是16位宽的，所以在传输数据时，一定要注意配置的数据位宽和DMA的长度位宽要一致，TIM2的传输数据位宽推荐使用32位宽。

尤其是当配置为16位宽数据传输时，要确保传入寄存器的值要为16位宽，否则就没有波形输出。

（5）代码链接

以下是我本次使用代码，下面也会有代码说明，不想要代码，看看思路也能看明白的。
https://download.csdn.net/download/qq_22146161/72392551

（6）代码说明

（1）配置细节

如下图，是使用软件STM32cubeIDE配置出来的。
（1）调试部分-基础配置-没什么好说的，这样配就行，大家都一样

（2）时钟引脚配置-基础配置-没什么好说的，这样配就行，大家都一样

（3）时钟配置F4基本上系统时钟都168M，然后APB1 TImer clocks就是84M，这个时钟可以最后配置，但是定时器周期一定要105。

（4）定时器2配置,选择通道1，选择tim2_ch1,选择内存到外设，DMA模式选择循环模式


另外因为要点灯带ws2812，周期选择105，（为啥是105呐），因为WS2812这个灯带，需求周期位800khz,也就是1.25uS。84M/105=800khz.如下图。

如下找到设置，输入105。

（5）定时器3配置雷同tim2配置。


别忘了开DMA通道，其它不用管。

（2）代码细节

（1）从代码函数的方面需要注意函数
注意：初始化部分函数，顺序不能颠倒，发现在移植过程中，因为初始化顺序，导致的很大问题。

  1. 初始化函数
    MX_GPIO_Init();
  2. DMA初始化函数
    MX_DMA_Init();
  3. 定时器初始化函数
    MX_TIM2_Init();
    MX_TIM3_Init();

前三个函数没啥好说的，只要注意顺不颠倒就行，配置好后，软件自动生成上边几个初始函数。

  1. 隐藏的配置函数
    这个函数挺恼人的，它虽然不写出来，但是会默认执行，配置一旦初始化顺序不对，它就不好使，还不好找，而且不同软件版本可能还不一样。
    void HAL_TIM_Base_MspInit(TIM_HandleTypeDef htim_base)；*
    或者
    void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef htim_pwm)；*
    上述两个函数，软件会帮咱们默认生成其中之一，都是DMA通道配置函数，但是它不在写出来，回调出来的。不在眼前容易看不到。

  2. 功能函数
    因为要点功灯带WS2812,所以简单写了一个功能函数，如果你不点灯带也没关系，简单功能实现也会告诉你F4上TIM2和TIM3是有差别的，都在ws2812_example();内。
    （1）想到点灯带，看看如何实现的
    在功能函数内，ws2812_set_RGB和ws2812_set_RGB1两个函数是帮忙赛数据，再给tim2和tim3准备数据，使用HAl库准备好的函数HAL_TIM_PWM_Start_DMA发送数据。

    在使用函数ws2812_set_RGB和ws2812_set_RGB1塞数据的时候，注意，TIM2全程使用32位的，TIM3全程使用16位的

（2）不想点灯带，看看如何输出的
自己准备的数据，注意TIM2要uint32_t位的。TIM3要uint16_t位的。

发送数据时，HAL_TIM_PWM_Start_DMA函数对于32位数据不需要强制转换，但是TIM3是16位的需要强转。

以下位代码段
main.c

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.* All rights reserved.</center></h2>** This software component is licensed by ST under BSD 3-Clause license,* the "License"; You may not use this file except in compliance with the* License. You may obtain a copy of the License at:*                        opensource.org/licenses/BSD-3-Clause********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes *//* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD *//* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim2;
TIM_HandleTypeDef htim3;
DMA_HandleTypeDef hdma_tim2_ch1;
DMA_HandleTypeDef hdma_tim3_ch1_trig;/* USER CODE BEGIN PV */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/以下为应用程序 自己写功能函数//其余通过STM32cubeIDE配置生成uint32_t tim2_ccr1_value[]={10,20,30,40,50,60,70,80,90};
uint16_t tim3_ccr1_value[]={10,20,30,40,50,60,70,80,90};#define ONE_PULSE        (59)                           //1
#define ZERO_PULSE       (29)                           //0
#define RESET_PULSE      (48)                           //80 ¸
#define LED_NUMS         (22)                            //led ¸
#define LED_DATA_LEN     (24)                           //led
#define WS2812_DATA_LEN  (LED_NUMS*LED_DATA_LEN)        //ws2812uint16_t  RGB_buffur[RESET_PULSE + WS2812_DATA_LEN] = { 0 };
uint32_t  RGB_buffur1[RESET_PULSE + WS2812_DATA_LEN] = { 0 };void ws2812_set_RGB(uint8_t R, uint8_t G, uint8_t B, uint16_t num)
{uint16_t * p = (RGB_buffur + RESET_PULSE) + (num * LED_DATA_LEN);for (uint16_t i = 0;i < 8;i++){p[i]      = (G << i) & (0x80)?ONE_PULSE:ZERO_PULSE;p[i + 8]  = (R << i) & (0x80)?ONE_PULSE:ZERO_PULSE;p[i + 16] = (B << i) & (0x80)?ONE_PULSE:ZERO_PULSE;}}void ws2812_set_RGB1(uint8_t R, uint8_t G, uint8_t B, uint16_t num)
{uint32_t * p = (RGB_buffur1 + RESET_PULSE) + (num * LED_DATA_LEN);for (uint16_t i = 0;i < 8;i++){p[i]      = (G << i) & (0x80)?ONE_PULSE:ZERO_PULSE;p[i + 8]  = (R << i) & (0x80)?ONE_PULSE:ZERO_PULSE;p[i + 16] = (B << i) & (0x80)?ONE_PULSE:ZERO_PULSE;}}void HAL_TIM_PWM_PulseFinishedCallback(TIM_HandleTypeDef *htim)
{__HAL_TIM_SetCompare(htim, TIM_CHANNEL_1,0); //占空比清0，若不清会导致灯珠颜色不对HAL_TIM_PWM_Stop_DMA(htim,TIM_CHANNEL_1);//  __HAL_TIM_SetCompare(htim, TIM_CHANNEL_2,0); //占空比清0，若不清会导致灯珠颜色不对//     HAL_TIM_PWM_Stop_DMA(htim,TIM_CHANNEL_2);
}void ws2812_example(void)
{ws2812_set_RGB1(0x22, 0x00, 0x00, 0);ws2812_set_RGB1(0x00, 0x22, 0x00, 1);ws2812_set_RGB1(0x00, 0x00, 0x22, 2);ws2812_set_RGB1(0x22, 0x22, 0x22, 3);ws2812_set_RGB1(0x22, 0x00, 0x00, 4);ws2812_set_RGB1(0x00, 0x22, 0x00, 5);ws2812_set_RGB1(0x00, 0x00, 0x22, 6);ws2812_set_RGB1(0x22, 0x22, 0x22, 7);ws2812_set_RGB1(0x22, 0x00, 0x00, 8);ws2812_set_RGB1(0x00, 0x22, 0x00, 9);ws2812_set_RGB1(0x00, 0x00, 0x22, 10);ws2812_set_RGB1(0x22, 0x22, 0x22, 11);ws2812_set_RGB1(0x22, 0x00, 0x00, 12);ws2812_set_RGB1(0x00, 0x22, 0x00, 13);ws2812_set_RGB1(0x00, 0x00, 0x22, 14);ws2812_set_RGB1(0x22, 0x22, 0x22, 15);ws2812_set_RGB1(0x22, 0x00, 0x00, 16);ws2812_set_RGB1(0x00, 0x22, 0x00, 17);ws2812_set_RGB1(0x00, 0x00, 0x22, 18);ws2812_set_RGB1(0x22, 0x22, 0x22, 19);ws2812_set_RGB1(0x22, 0x00, 0x00, 20);ws2812_set_RGB1(0x00, 0x22, 0x00, 21);///R-红///G-绿//B-蓝/第几个灯//ws2812_set_RGB(0x22, 0x22, 0x22, 0);  //0010 0010    0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 1);  //0010 0010  0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 2);  //0000 0000  0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 3);  //0000 0010  0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 4);  //0010 0010  0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 5);  //0010 0010  0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 6);  //0000 0000  0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 7);  //0000 0010  0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 8);  //0010 0010  0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 9);  //0010 0010  0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 10);  //0000 0000 0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 11);  //0000 0010 0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 12);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 13);  //0010 0010 0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 14);  //0000 0000 0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 15);  //0000 0010 0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 16);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 17);  //0010 0010 0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 18);  //0000 0000 0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 19);  //0000 0010 0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 20);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 21);  //0010 0010 0000 0000   0000 0000HAL_TIM_PWM_Start_DMA(&htim2,TIM_CHANNEL_1,(uint32_t *)RGB_buffur1,576);HAL_TIM_PWM_Start_DMA(&htim3,TIM_CHANNEL_1,(uint32_t *)RGB_buffur,576);HAL_Delay(10);HAL_TIM_PWM_Start_DMA(&htim2, TIM_CHANNEL_1, tim2_ccr1_value, 9);HAL_TIM_PWM_Start_DMA(&htim3, TIM_CHANNEL_1, (uint32_t *)tim3_ccr1_value, 9);HAL_Delay(300);
/*///R-红///G-绿//B-蓝/第几个灯//ws2812_set_RGB(0x22, 0x22, 0x22, 0);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 1);  //0010 0010  0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 2);  //0000 0000  0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 3);  //0000 0010  0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 4);  //0010 0010  0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 5);  //0010 0010  0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 6);  //0000 0000  0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 7);  //0000 0010  0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 8);  //0010 0010  0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 9);  //0010 0010  0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 10);  //0000 0000 0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 11);  //0000 0010 0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 12);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 13);  //0010 0010 0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 14);  //0000 0000 0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 15);  //0000 0010 0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 16);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 17);  //0010 0010 0000 0000   0000 0000ws2812_set_RGB(0x00, 0x22, 0x00, 18);  //0000 0000 0010 0010   0000 0000ws2812_set_RGB(0x00, 0x00, 0x22, 19);  //0000 0010 0000 0000   0010 0010ws2812_set_RGB(0x22, 0x22, 0x22, 20);  //0010 0010 0010 0010   0010 0010ws2812_set_RGB(0x22, 0x00, 0x00, 21);  //0010 0010 0000 0000   0000 0000//发送HAL_TIM_PWM_Start_DMA(&htim2,TIM_CHANNEL_1,(uint32_t *)RGB_buffur,576);HAL_TIM_PWM_Start_DMA(&htim3,TIM_CHANNEL_1,(uint32_t *)RGB_buffur,576);HAL_Delay(100);HAL_TIM_PWM_Start_DMA(&htim2, TIM_CHANNEL_1, tim2_ccr1_value, 9);HAL_TIM_PWM_Start_DMA(&htim3, TIM_CHANNEL_1, (uint32_t *)tim3_ccr1_value, 9);HAL_Delay(300);*/
}/以上为应用程序结束 自己写功能函数//其余通过STM32cubeIDE配置生成
/* USER CODE END PM */
/* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_TIM2_Init(void);
static void MX_TIM3_Init(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_DMA_Init();MX_TIM2_Init();MX_TIM3_Init();/* USER CODE BEGIN 2 *//* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE */ws2812_example();// HAL_Delay(500);//  ws2812_example();/* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = 4;RCC_OscInitStruct.PLL.PLLN = 168;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = 4;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV2;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/*** @brief TIM2 Initialization Function* @param None* @retval None*/
static void MX_TIM2_Init(void)
{/* USER CODE BEGIN TIM2_Init 0 *//* USER CODE END TIM2_Init 0 */TIM_ClockConfigTypeDef sClockSourceConfig = {0};TIM_MasterConfigTypeDef sMasterConfig = {0};TIM_OC_InitTypeDef sConfigOC = {0};/* USER CODE BEGIN TIM2_Init 1 *//* USER CODE END TIM2_Init 1 */htim2.Instance = TIM2;htim2.Init.Prescaler = 0;htim2.Init.CounterMode = TIM_COUNTERMODE_UP;htim2.Init.Period = 105;htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;if (HAL_TIM_Base_Init(&htim2) != HAL_OK){Error_Handler();}sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK){Error_Handler();}if (HAL_TIM_PWM_Init(&htim2) != HAL_OK){Error_Handler();}sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK){Error_Handler();}sConfigOC.OCMode = TIM_OCMODE_PWM1;sConfigOC.Pulse = 59;sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK){Error_Handler();}/* USER CODE BEGIN TIM2_Init 2 *//* USER CODE END TIM2_Init 2 */HAL_TIM_MspPostInit(&htim2);}/*** @brief TIM3 Initialization Function* @param None* @retval None*/
static void MX_TIM3_Init(void)
{/* USER CODE BEGIN TIM3_Init 0 *//* USER CODE END TIM3_Init 0 */TIM_ClockConfigTypeDef sClockSourceConfig = {0};TIM_MasterConfigTypeDef sMasterConfig = {0};TIM_OC_InitTypeDef sConfigOC = {0};/* USER CODE BEGIN TIM3_Init 1 *//* USER CODE END TIM3_Init 1 */htim3.Instance = TIM3;htim3.Init.Prescaler = 0;htim3.Init.CounterMode = TIM_COUNTERMODE_UP;htim3.Init.Period = 105;htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;if (HAL_TIM_Base_Init(&htim3) != HAL_OK){Error_Handler();}sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK){Error_Handler();}if (HAL_TIM_PWM_Init(&htim3) != HAL_OK){Error_Handler();}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 = 59;sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK){Error_Handler();}/* USER CODE BEGIN TIM3_Init 2 *//* USER CODE END TIM3_Init 2 */HAL_TIM_MspPostInit(&htim3);}/*** Enable DMA controller clock*/
static void MX_DMA_Init(void)
{/* DMA controller clock enable */__HAL_RCC_DMA1_CLK_ENABLE();/* DMA interrupt init *//* DMA1_Stream4_IRQn interrupt configuration */HAL_NVIC_SetPriority(DMA1_Stream4_IRQn, 0, 0);HAL_NVIC_EnableIRQ(DMA1_Stream4_IRQn);/* DMA1_Stream5_IRQn interrupt configuration */HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 0);HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);}/*** @brief GPIO Initialization Function* @param None* @retval None*/
static void MX_GPIO_Init(void)
{/* GPIO Ports Clock Enable */__HAL_RCC_GPIOH_CLK_ENABLE();__HAL_RCC_GPIOA_CLK_ENABLE();}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @brief  This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef  USE_FULL_ASSERT
/*** @brief  Reports the name of the source file and the source line number*         where the assert_param error has occurred.* @param  file: pointer to the source file name* @param  line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

stm32f4xx_hal_msp.c

/* USER CODE BEGIN Header */
/********************************************************************************* @file         stm32f4xx_hal_msp.c* @brief        This file provides code for the MSP Initialization*               and de-Initialization codes.******************************************************************************* @attention** <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.* All rights reserved.</center></h2>** This software component is licensed by ST under BSD 3-Clause license,* the "License"; You may not use this file except in compliance with the* License. You may obtain a copy of the License at:*                        opensource.org/licenses/BSD-3-Clause********************************************************************************/
/* USER CODE END Header *//* Includes ------------------------------------------------------------------*/
#include "main.h"
/* USER CODE BEGIN Includes *//* USER CODE END Includes */
extern DMA_HandleTypeDef hdma_tim2_ch1;extern DMA_HandleTypeDef hdma_tim3_ch1_trig;/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN TD *//* USER CODE END TD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN Define *//* USER CODE END Define *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN Macro *//* USER CODE END Macro *//* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* External functions --------------------------------------------------------*/
/* USER CODE BEGIN ExternalFunctions *//* USER CODE END ExternalFunctions *//* USER CODE BEGIN 0 *//* USER CODE END 0 */void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);/*** Initializes the Global MSP.*/
void HAL_MspInit(void)
{/* USER CODE BEGIN MspInit 0 *//* USER CODE END MspInit 0 */__HAL_RCC_SYSCFG_CLK_ENABLE();__HAL_RCC_PWR_CLK_ENABLE();/* System interrupt init*//* USER CODE BEGIN MspInit 1 *//* USER CODE END MspInit 1 */
}/**
* @brief TIM_Base MSP Initialization
* This function configures the hardware resources used in this example
* @param htim_base: TIM_Base handle pointer
* @retval None
*/
void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{if(htim_base->Instance==TIM2){/* USER CODE BEGIN TIM2_MspInit 0 *//* USER CODE END TIM2_MspInit 0 *//* Peripheral clock enable */__HAL_RCC_TIM2_CLK_ENABLE();/* TIM2 DMA Init *//* TIM2_CH1 Init */hdma_tim2_ch1.Instance = DMA1_Stream5;hdma_tim2_ch1.Init.Channel = DMA_CHANNEL_3;hdma_tim2_ch1.Init.Direction = DMA_MEMORY_TO_PERIPH;hdma_tim2_ch1.Init.PeriphInc = DMA_PINC_DISABLE;hdma_tim2_ch1.Init.MemInc = DMA_MINC_ENABLE;hdma_tim2_ch1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;hdma_tim2_ch1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;hdma_tim2_ch1.Init.Mode = DMA_CIRCULAR;hdma_tim2_ch1.Init.Priority = DMA_PRIORITY_LOW;hdma_tim2_ch1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;if (HAL_DMA_Init(&hdma_tim2_ch1) != HAL_OK){Error_Handler();}__HAL_LINKDMA(htim_base,hdma[TIM_DMA_ID_CC1],hdma_tim2_ch1);/* USER CODE BEGIN TIM2_MspInit 1 *//* USER CODE END TIM2_MspInit 1 */}else if(htim_base->Instance==TIM3){/* USER CODE BEGIN TIM3_MspInit 0 *//* USER CODE END TIM3_MspInit 0 *//* Peripheral clock enable */__HAL_RCC_TIM3_CLK_ENABLE();/* TIM3 DMA Init *//* TIM3_CH1_TRIG Init */hdma_tim3_ch1_trig.Instance = DMA1_Stream4;hdma_tim3_ch1_trig.Init.Channel = DMA_CHANNEL_5;hdma_tim3_ch1_trig.Init.Direction = DMA_MEMORY_TO_PERIPH;hdma_tim3_ch1_trig.Init.PeriphInc = DMA_PINC_DISABLE;hdma_tim3_ch1_trig.Init.MemInc = DMA_MINC_ENABLE;hdma_tim3_ch1_trig.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;hdma_tim3_ch1_trig.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;hdma_tim3_ch1_trig.Init.Mode = DMA_CIRCULAR;hdma_tim3_ch1_trig.Init.Priority = DMA_PRIORITY_LOW;hdma_tim3_ch1_trig.Init.FIFOMode = DMA_FIFOMODE_DISABLE;if (HAL_DMA_Init(&hdma_tim3_ch1_trig) != HAL_OK){Error_Handler();}/* Several peripheral DMA handle pointers point to the same DMA handle.Be aware that there is only one stream to perform all the requested DMAs. */__HAL_LINKDMA(htim_base,hdma[TIM_DMA_ID_CC1],hdma_tim3_ch1_trig);__HAL_LINKDMA(htim_base,hdma[TIM_DMA_ID_TRIGGER],hdma_tim3_ch1_trig);/* USER CODE BEGIN TIM3_MspInit 1 *//* USER CODE END TIM3_MspInit 1 */}}
/**
* @brief TIM_PWM MSP Initialization
* This function configures the hardware resources used in this example
* @param htim_pwm: TIM_PWM handle pointer
* @retval None
*/void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* htim_pwm)
{if(htim_pwm->Instance==TIM2){__HAL_RCC_TIM2_CLK_ENABLE();hdma_tim2_ch1.Instance = DMA1_Stream5;hdma_tim2_ch1.Init.Channel = DMA_CHANNEL_3;hdma_tim2_ch1.Init.Direction = DMA_MEMORY_TO_PERIPH;hdma_tim2_ch1.Init.PeriphInc = DMA_PINC_DISABLE;hdma_tim2_ch1.Init.MemInc = DMA_MINC_ENABLE;hdma_tim2_ch1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;hdma_tim2_ch1.Init.MemDataAlignment = DMA_PDATAALIGN_WORD;hdma_tim2_ch1.Init.Mode = DMA_CIRCULAR;hdma_tim2_ch1.Init.Priority = DMA_PRIORITY_LOW;hdma_tim2_ch1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;if (HAL_DMA_Init(&hdma_tim2_ch1) != HAL_OK){Error_Handler();}__HAL_LINKDMA(htim_pwm,hdma[TIM_DMA_ID_CC1],hdma_tim2_ch1);}else if(htim_pwm->Instance==TIM3){__HAL_RCC_TIM3_CLK_ENABLE();hdma_tim3_ch1_trig.Instance = DMA1_Stream4;hdma_tim3_ch1_trig.Init.Channel = DMA_CHANNEL_5;hdma_tim3_ch1_trig.Init.Direction = DMA_MEMORY_TO_PERIPH;hdma_tim3_ch1_trig.Init.PeriphInc = DMA_PINC_DISABLE;hdma_tim3_ch1_trig.Init.MemInc = DMA_MINC_ENABLE;hdma_tim3_ch1_trig.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;hdma_tim3_ch1_trig.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;hdma_tim3_ch1_trig.Init.Mode = DMA_CIRCULAR;hdma_tim3_ch1_trig.Init.Priority = DMA_PRIORITY_LOW;hdma_tim3_ch1_trig.Init.FIFOMode = DMA_FIFOMODE_DISABLE;if (HAL_DMA_Init(&hdma_tim3_ch1_trig) != HAL_OK){Error_Handler();}__HAL_LINKDMA(htim_pwm,hdma[TIM_DMA_ID_CC1],hdma_tim3_ch1_trig);__HAL_LINKDMA(htim_pwm,hdma[TIM_DMA_ID_TRIGGER],hdma_tim3_ch1_trig);}}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 ConfigurationPA0-WKUP     ------> TIM2_CH1*/GPIO_InitStruct.Pin = GPIO_PIN_0;GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;GPIO_InitStruct.Pull = GPIO_PULLUP;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);/* USER CODE BEGIN TIM2_MspPostInit 1 *//* USER CODE END TIM2_MspPostInit 1 */}else if(htim->Instance==TIM3){/* USER CODE BEGIN TIM3_MspPostInit 0 *//* USER CODE END TIM3_MspPostInit 0 */__HAL_RCC_GPIOA_CLK_ENABLE();/**TIM3 GPIO ConfigurationPA6     ------> TIM3_CH1*/GPIO_InitStruct.Pin = GPIO_PIN_6;GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;GPIO_InitStruct.Pull = GPIO_PULLUP;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);/* USER CODE BEGIN TIM3_MspPostInit 1 *//* USER CODE END TIM3_MspPostInit 1 */}}
/**
* @brief TIM_PWM MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param htim_pwm: TIM_PWM handle pointer
* @retval None
*/
void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef* htim_pwm)
{if(htim_pwm->Instance==TIM2){/* USER CODE BEGIN TIM2_MspDeInit 0 *//* USER CODE END TIM2_MspDeInit 0 *//* Peripheral clock disable */__HAL_RCC_TIM2_CLK_DISABLE();/* TIM2 DMA DeInit */HAL_DMA_DeInit(htim_pwm->hdma[TIM_DMA_ID_CC1]);/* USER CODE BEGIN TIM2_MspDeInit 1 *//* USER CODE END TIM2_MspDeInit 1 */}else if(htim_pwm->Instance==TIM3){/* USER CODE BEGIN TIM3_MspDeInit 0 *//* USER CODE END TIM3_MspDeInit 0 *//* Peripheral clock disable */__HAL_RCC_TIM3_CLK_DISABLE();/* TIM3 DMA DeInit */HAL_DMA_DeInit(htim_pwm->hdma[TIM_DMA_ID_CC1]);HAL_DMA_DeInit(htim_pwm->hdma[TIM_DMA_ID_TRIGGER]);/* USER CODE BEGIN TIM3_MspDeInit 1 *//* USER CODE END TIM3_MspDeInit 1 */}}/* USER CODE BEGIN 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==TIM2){/* USER CODE BEGIN TIM2_MspDeInit 0 *//* USER CODE END TIM2_MspDeInit 0 *//* Peripheral clock disable */__HAL_RCC_TIM2_CLK_DISABLE();/* TIM2 DMA DeInit */HAL_DMA_DeInit(htim_base->hdma[TIM_DMA_ID_CC1]);/* USER CODE BEGIN TIM2_MspDeInit 1 *//* USER CODE END TIM2_MspDeInit 1 */}else if(htim_base->Instance==TIM3){/* USER CODE BEGIN TIM3_MspDeInit 0 *//* USER CODE END TIM3_MspDeInit 0 *//* Peripheral clock disable */__HAL_RCC_TIM3_CLK_DISABLE();/* TIM3 DMA DeInit */HAL_DMA_DeInit(htim_base->hdma[TIM_DMA_ID_CC1]);HAL_DMA_DeInit(htim_base->hdma[TIM_DMA_ID_TRIGGER]);/* USER CODE BEGIN TIM3_MspDeInit 1 *//* USER CODE END TIM3_MspDeInit 1 */}}/* USER CODE END 1 *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

（7）后期验证

使用逻辑分析仪进行验证查看数据是否正确。
（1）验证有数据，其中两段数据间隔10ms

（2）查看细节-ws2812数据，周期1.25左右

（3）查看细节-数组数据，因周期是105，那么10/105大约是9%左右

以下位数据情况

（8）后期补充-细节

对了忘记说了，所以后期补充下
（1）在使用正点原子开发板子时 tim2ch2时发现数据波形不对，这是因为这款板子外挂模块所致，换了一块其他板子没有这个毛病。
抓到波形如下图

查找原理图。


这个模块会影响。

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