---

title: HALPWM配置占空比频率
tags:

• STM32
• Clion
• Hal

---

控制pwm开关

//启动定时器
HAL_StatusTypeDef HAL_TIM_Base_Start(TIM_HandleTypeDef *htim);//关闭定时器
HAL_StatusTypeDef HAL_TIM_Base_Stop(TIM_HandleTypeDef *htim);//启动指定通道PWM
HAL_StatusTypeDef HAL_TIM_PWM_Start(TIM_HandleTypeDef *htim, uint32_t Channel);//停止指定通道PWM
HAL_StatusTypeDef HAL_TIM_PWM_Stop(TIM_HandleTypeDef *htim, uint32_t Channel);//设置指定通道占空比
void __HAL_TIM_SetCompare(TIM_HandleTypeDef *htim, uint32_t Channel,uint16_t Value);//设置定时器计数器值
coid __HAL_TIM_SetCompare(TIM_HandleTypeDef *htim, uint16_t Value)

 if (sta==0){HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_2);} else if(sta==1){// D=5%HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_2);D=5;  HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);} else if (sta==2){// 10%≤D≤85%HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_2);D=50; HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);} else if (sta==3){// 85%<D≤90%HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_2);D=88;HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2); /// 这里的Start 已经不起作用了}

** HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_2); 相当于把这个中断使能关闭了需要到外部开启 **

/ 按键中断
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{if(GPIO_Pin==SW1_Pin){HAL_GPIO_WritePin(GPIOB, LED_G_Pin|LED_B_Pin|LED_R_Pin, GPIO_PIN_SET);HAL_GPIO_TogglePin(LED_G_GPIO_Port,LED_G_Pin);HAL_UART_Transmit(&huart1,"G", sizeof("G")-1, 100);sta--;if(sta==4){HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);}} else if (GPIO_Pin==SW3_Pin){HAL_GPIO_WritePin(GPIOB, LED_G_Pin|LED_B_Pin|LED_R_Pin, GPIO_PIN_SET);HAL_GPIO_TogglePin(LED_R_GPIO_Port,LED_R_Pin);HAL_UART_Transmit(&huart1,"R", sizeof("R")-1, 100);sta++;if(sta==4){HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);}}
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{if(sta==1){set_pwm_param(htim2, TIM_CHANNEL_2, 1000, 50);}else if(sta==2){set_pwm_param(htim2, TIM_CHANNEL_2, 1000, 20);}else if(sta==3){//HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_2);HAL_UART_Transmit(&huart1,"3", sizeof("3")-1, 100);}else if(sta==4){//set_pwm_param(htim2, TIM_CHANNEL_2, 1000, 40);}}

大概就是这么个意思也没仔细看HAL开发的文档 就虾摸我豆