TIM4 设置PWM
时间: 2024-04-25 11:23:46 浏览: 137
根据引用\[1\]和引用\[2\]的内容,可以了解到设置TIM4的PWM需要进行以下步骤:
1. 配置TIM4的GPIO引脚作为PWM输出。
2. 初始化TIM4为从模式。
3. 配置PWM的周期、占空比和数量。
4. 初始化PWM。
5. 启用TIM4中断服务处理。
具体的代码实现如下:
```c
// 步骤一:配置TIM4的GPIO引脚作为PWM输出
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_TIM4);
// 步骤二:初始化TIM4为从模式
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 999; // 设置PWM周期
TIM_TimeBaseStructure.TIM_Prescaler = 83; // 设置预分频系数
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
// 步骤三:配置PWM的周期、占空比和数量
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 499; // 设置PWM占空比
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM4, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM4, ENABLE);
// 步骤四:初始化PWM
TIM_Cmd(TIM4, ENABLE);
// 步骤五:启用TIM4中断服务处理
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
```
以上代码是一个示例,具体的配置参数根据实际需求进行调整。
#### 引用[.reference_title]
- *1* [STM32定时器间的同步 主TIM1产生PWM 从TIM4精确控制TIM1 PWM脉冲数量](https://blog.csdn.net/Ceosat/article/details/109178259)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [STM32F4 TIM1输出PWM配置](https://blog.csdn.net/zuoxi4621/article/details/124682393)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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