NUCLEO-L053R8 | TIM定时器 PWM输出 - Tuple

NUCLEO-L053R8 | TIM定时器 PWM输出

TIM2 PWM输出测试

　　今天给大伙分享一个TIM2 PWM输出小实验。

　　实验开发板：Nucleo-L053R8，即STM32L053R8T6。

　　开发环境：MDK5

图1 - 工程界面

　　本次实验测试的是通用定时器TIM2，PWM输出模式。

附上代码：

bsp_tim.h

 1 /**
 2   ******************************************************************************
 3   * File Name          : bsp_tim.h
 4   * Description        : This file provides code for the configuration
 5   *                      of the TIM instances.
 6   ******************************************************************************
 7   */
 8 #ifndef __BSP_TIM_H
 9 #define __BSP_TIM_H
10 
11 #include "stm32l0xx_hal.h"
12 
13 // 使用宏定义，代码易于移植
14 
15 #define        TIM_CH1_PORT        GPIOA
16 #define     TIM_CH1_PIN            GPIO_PIN_0
17 
18 #define        TIM_x                TIM2
19 #define        TIM_CHANNEL_x          TIM_CHANNEL_1
20 #define        TIM_CLK_ENABLE        __HAL_RCC_TIM2_CLK_ENABLE()
21 
22 // PWM信号的频率 F = TIM_CLK/((ARR+1)*(PSC+1))
23 #define        TIM_PSC                (1-1)
24 #define        TIM_PERIOD            (200-1)        
25 #define        TIM_PULSE            100
26 
27 extern void _Error_Handler(void);
28 void HAL_TIM2_Init(void);
29 
30 #endif /* __BSP_TIM_H  */

View Code

bsp_tim.c

 1 /**
 2   ******************************************************************************
 3   * File Name          : bsp_tim.c
 4   * Description        : This file provides code for the configuration
 5   *                      of the TIM instances.
 6   ******************************************************************************
 7   */
 8  
 9 #include "bsp_tim.h"
10 
11 
12 static void HAL_TIM2_GPIO_Config(void)
13 {
14     GPIO_InitTypeDef GPIO_InitStruct;
15     
16     // TIM2_PWM输出GPIO初始化   PA0 ----> TIM2_CH1 
17     GPIO_InitStruct.Pin = TIM_CH1_PIN;
18     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
19     GPIO_InitStruct.Pull = GPIO_NOPULL;
20     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
21     GPIO_InitStruct.Alternate = GPIO_AF2_TIM2;
22     HAL_GPIO_Init(TIM_CH1_PORT, &GPIO_InitStruct);
23 }
24 
25 static void HAL_TIM2_Mode_Config(void)
26 {
27     TIM_HandleTypeDef TIM_HandleStruct;
28     TIM_MasterConfigTypeDef TIM_MasterStruct;
29     TIM_OC_InitTypeDef TIM_OC_InitStruct;
30     
31     // 开启定时器时钟
32     TIM_CLK_ENABLE;
33     
34     TIM_HandleStruct.Instance = TIM_x;
35     TIM_HandleStruct.Init.Prescaler = TIM_PSC;
36     TIM_HandleStruct.Init.CounterMode = TIM_COUNTERMODE_UP;
37     TIM_HandleStruct.Init.Period = TIM_PERIOD;
38     TIM_HandleStruct.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
39     if (HAL_TIM_PWM_Init(&TIM_HandleStruct) != HAL_OK)
40     {
41         _Error_Handler();
42     }
43 
44     TIM_MasterStruct.MasterOutputTrigger = TIM_TRGO_RESET;
45     TIM_MasterStruct.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
46     if (HAL_TIMEx_MasterConfigSynchronization(&TIM_HandleStruct, &TIM_MasterStruct) != HAL_OK)
47     {
48         _Error_Handler();
49     }
50 
51     TIM_OC_InitStruct.OCMode = TIM_OCMODE_PWM1;
52     TIM_OC_InitStruct.Pulse = TIM_PULSE;
53     TIM_OC_InitStruct.OCPolarity = TIM_OCPOLARITY_HIGH;
54     TIM_OC_InitStruct.OCFastMode = TIM_OCFAST_DISABLE;
55     if (HAL_TIM_PWM_ConfigChannel(&TIM_HandleStruct, &TIM_OC_InitStruct, TIM_CHANNEL_x) != HAL_OK)
56     {
57         _Error_Handler();
58     }
59 
60     HAL_TIM_PWM_Start(&TIM_HandleStruct, TIM_CHANNEL_x);
61 }
62 
63 void HAL_TIM2_Init(void)
64 {
65     HAL_TIM2_GPIO_Config();
66     HAL_TIM2_Mode_Config();
67 }

View Code

main.c

 1 /**
 2   ******************************************************************************
 3   * @file    main.c 
 4   * @author  Tuple
 5   * @brief   Main program body
 6   ******************************************************************************
 7   */
 8   
 9 #include "stm32l0xx_hal.h"
10 #include "bsp_tim.h"
11 
12 void _Error_Handler(void);
13 void SystemClock_Config(void);
14 
15 int main(void)
16 {
17     //重置所有外围设备，初始化Flash接口和Systick
18     HAL_Init();
19     
20     //系统时钟配置
21     SystemClock_Config();
22     
23     //TIM2 PWM输出配置
24     HAL_TIM2_Init();
25     
26 }
27 
28 
29 void SystemClock_Config(void)
30 {
31     RCC_OscInitTypeDef RCC_OscInitStruct;
32     RCC_ClkInitTypeDef RCC_ClkInitStruct;
33 
34     //Configure the main internal regulator output voltage 
35     __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
36 
37     //Initializes the CPU, AHB and APB busses clocks 
38     RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
39     RCC_OscInitStruct.HSIState = RCC_HSI_ON;
40     RCC_OscInitStruct.HSICalibrationValue = 16;
41     RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
42     RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
43     RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
44     RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
45     if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
46     {
47         _Error_Handler();
48     }
49 
50     //Initializes the CPU, AHB and APB busses clocks 
51     RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
52                                 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
53     RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
54     RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
55     RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
56     RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
57 
58     if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
59     {
60         _Error_Handler();
61     }
62 
63     HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1);
64 
65     //Configure the Systick interrupt time 
66     HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
67 
68     //Configure the Systick 
69     HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
70 
71     //SysTick_IRQn interrupt configuration 
72     HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
73 }
74 
75 void _Error_Handler()
76 {
77     while(1)
78     {
79     }
80 }