用stm32初始化定时器3通道1
时间: 2024-05-03 13:20:02 浏览: 11
以下是用STM32初始化定时器3通道1的示例代码:
首先,需要启用定时器3的时钟,并将其配置为计数器模式:
```
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN; // Enable the clock for Timer 3
TIM3->CR1 &= ~TIM_CR1_DIR; // Configure Timer 3 as up-counter
```
接下来,需要配置定时器3通道1的输出比较模式,并设置其输出比较值:
```
TIM3->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; // Configure Timer 3 Channel 1 as PWM mode 1
TIM3->CCR1 = 1000; // Set the output compare value for Channel 1
```
最后,需要启用定时器3通道1的输出比较功能,并启动定时器3:
```
TIM3->CCER |= TIM_CCER_CC1E; // Enable the output compare for Channel 1
TIM3->CR1 |= TIM_CR1_CEN; // Start Timer 3
```
完整的初始化代码示例如下:
```
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN; // Enable the clock for Timer 3
TIM3->CR1 &= ~TIM_CR1_DIR; // Configure Timer 3 as up-counter
TIM3->CCMR1 |= TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; // Configure Timer 3 Channel 1 as PWM mode 1
TIM3->CCR1 = 1000; // Set the output compare value for Channel 1
TIM3->CCER |= TIM_CCER_CC1E; // Enable the output compare for Channel 1
TIM3->CR1 |= TIM_CR1_CEN; // Start Timer 3
```