STM32——定时器：高级定时器-编程阁

步骤	HAL库函数	备注
1.配置定时器基础工作参数	HAL_TIM_PWM_Init()
2.定时器PWM输出MSP初始化	HAL_TIM_PWM_MspInit()	配置NVIC、CLOCK、GPIO等
3.配置PWM模式/比较值等	HAL_TIM_PWM_ConfigChannel()
4.设置优先级，使能中断	HAL_NVIC_SetPeriority() HAL_NVIC_EnableIRQ()
5.使能定时器更新中断	__HAL_TIM_ENABLE_IT()
6.使能输出、主输出、计数器	HAL_TIM_PWM_Start()	主输出只有高级定时器才有
7.编写中断服务函数	TIMx_IRQHandler()等	会调用中断公共处理函数 HAL_TIM_IRQHandler()
8.编写更新中断回调函数	HAL_TIM_PeriodElapsedCallback()

4.4.2 高级定时器输出模式实验配置步骤

4.4.3 例程

手册:

#include "./SYSTEM/sys/sys.h" #include "./SYSTEM/usart/usart.h" #include "./SYSTEM/delay/delay.h" #include "./BSP/LED/led.h" #include "./BSP/TIMER/atim.h" extern TIM_HandleTypeDef g_timx_comp_pwm_handle; /* 定时器x句柄 */ int main(void) { uint8_t t = 0; HAL_Init(); /* 初始化HAL库 */ sys_stm32_clock_init(RCC_PLL_MUL9); /* 设置时钟, 72Mhz */ delay_init(72); /* 延时初始化 */ usart_init(115200); /* 串口初始化为115200 */ led_init(); /* 初始化LED */ atim_timx_comp_pwm_init(1000 - 1, 72 - 1); __HAL_TIM_SET_COMPARE(&g_timx_comp_pwm_handle, TIM_CHANNEL_1, 250 - 1); __HAL_TIM_SET_COMPARE(&g_timx_comp_pwm_handle, TIM_CHANNEL_2, 500 - 1); __HAL_TIM_SET_COMPARE(&g_timx_comp_pwm_handle, TIM_CHANNEL_3, 750 - 1); __HAL_TIM_SET_COMPARE(&g_timx_comp_pwm_handle, TIM_CHANNEL_4, 1000 - 1); while (1) { delay_ms(10); t++; if (t >= 20) { LED0_TOGGLE(); /* LED0(RED)闪烁 */ t = 0; } } }

#include "./BSP/TIMER/atim.h" TIM_HandleTypeDef g_timx_comp_pwm_handle; /* 定时器x句柄 */ /* 高级定时器 输出比较模式 初始化函数 */ void atim_timx_comp_pwm_init(uint16_t arr, uint16_t psc) { TIM_OC_InitTypeDef timx_oc_comp_pwm = {0}; g_timx_comp_pwm_handle.Instance = TIM8; /* 定时器8 */ g_timx_comp_pwm_handle.Init.Prescaler = psc ; /* 定时器分频 */ g_timx_comp_pwm_handle.Init.CounterMode = TIM_COUNTERMODE_UP; /* 递增计数模式 */ g_timx_comp_pwm_handle.Init.Period = arr; /* 自动重装载值 */ HAL_TIM_OC_Init(&g_timx_comp_pwm_handle); /* 输出比较模式初始化 */ timx_oc_comp_pwm.OCMode = TIM_OCMODE_TOGGLE; timx_oc_comp_pwm.OCPolarity = TIM_OCPOLARITY_HIGH; HAL_TIM_OC_ConfigChannel(&g_timx_comp_pwm_handle, &timx_oc_comp_pwm, TIM_CHANNEL_1); HAL_TIM_OC_ConfigChannel(&g_timx_comp_pwm_handle, &timx_oc_comp_pwm, TIM_CHANNEL_2); HAL_TIM_OC_ConfigChannel(&g_timx_comp_pwm_handle, &timx_oc_comp_pwm, TIM_CHANNEL_3); HAL_TIM_OC_ConfigChannel(&g_timx_comp_pwm_handle, &timx_oc_comp_pwm, TIM_CHANNEL_4); __HAL_TIM_ENABLE_OCxPRELOAD(&g_timx_comp_pwm_handle, TIM_CHANNEL_1); __HAL_TIM_ENABLE_OCxPRELOAD(&g_timx_comp_pwm_handle, TIM_CHANNEL_2); __HAL_TIM_ENABLE_OCxPRELOAD(&g_timx_comp_pwm_handle, TIM_CHANNEL_3); __HAL_TIM_ENABLE_OCxPRELOAD(&g_timx_comp_pwm_handle, TIM_CHANNEL_4); HAL_TIM_OC_Start(&g_timx_comp_pwm_handle, TIM_CHANNEL_1); HAL_TIM_OC_Start(&g_timx_comp_pwm_handle, TIM_CHANNEL_2); HAL_TIM_OC_Start(&g_timx_comp_pwm_handle, TIM_CHANNEL_3); HAL_TIM_OC_Start(&g_timx_comp_pwm_handle, TIM_CHANNEL_4); } /* 定时器 输出比较 MSP初始化函数 */ void HAL_TIM_OC_MspInit(TIM_HandleTypeDef *htim) { if (htim->Instance == TIM8) { GPIO_InitTypeDef gpio_init_struct; __HAL_RCC_TIM8_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); gpio_init_struct.Pin = GPIO_PIN_6; gpio_init_struct.Mode = GPIO_MODE_AF_PP; gpio_init_struct.Pull = GPIO_NOPULL; gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH; HAL_GPIO_Init(GPIOC, &gpio_init_struct); gpio_init_struct.Pin = GPIO_PIN_7; HAL_GPIO_Init(GPIOC, &gpio_init_struct); gpio_init_struct.Pin = GPIO_PIN_8; HAL_GPIO_Init(GPIOC, &gpio_init_struct); gpio_init_struct.Pin = GPIO_PIN_9; HAL_GPIO_Init(GPIOC, &gpio_init_struct); } }