RCT6中标准库PWM通道一初始化
时间: 2023-06-24 12:06:44 浏览: 147
在STM32F103系列中,使用标准库(StdPeriph Library)初始化PWM通道一包括以下步骤:
1. 配置GPIO为复用输出模式
```c
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //选择PA8引脚
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化GPIOA
```
2. 配置定时器TIM2
```c
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟
TIM_TimeBaseStructure.TIM_Period = 999; //设定计数器自动重装值
TIM_TimeBaseStructure.TIM_Prescaler = 72; //设定时钟预分频系数
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //初始化TIM2
```
3. 配置PWM输出模式
```c
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //PWM模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500; //设定占空比
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //高电平有效
TIM_OC1Init(TIM2, &TIM_OCInitStructure); //初始化PWM通道1
```
4. 开启定时器
```c
TIM_Cmd(TIM2, ENABLE); //开启TIM2
```
这样就完成了PWM通道一的初始化。需要注意的是,具体的预分频系数和自动重装值需要根据实际需要进行调整。
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