stm32f103基于标准库PB0口输出PWM波的代码
时间: 2023-08-16 19:07:47 浏览: 38
以下是基于标准库的STM32F103上PB0口输出PWM波的代码示例:
```c
#include "stm32f10x.h"
void GPIO_Configuration(void);
void TIM_Configuration(void);
int main(void)
{
GPIO_Configuration();
TIM_Configuration();
while (1)
{
// 在这里可以添加其他代码逻辑
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 999; // PWM 周期
TIM_TimeBaseStructure.TIM_Prescaler = 71; // 时钟预分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 499; // PWM 占空比
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM3, ENABLE);
TIM_Cmd(TIM3, ENABLE);
}
```
以上代码将配置PB0引脚为PWM输出,并且使用TIM3定时器生成PWM波。你可以根据需要修改PWM周期和占空比的值。在主循环中可以添加其他代码逻辑,如控制PWM波的变化等。