stm32f103c8t6p A8输出pwm
时间: 2024-01-26 14:03:52 浏览: 118
STM32-控制PA3TIM2-CH4输出PWM值_stm32f103c8t6_STM32PA3PWM_PWM频率stm32_P
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根据提供的引用内容,以下是在stm32f103c8t6p上使用A8输出PWM的示例代码:
```c
#include "stm32f10x.h"
void PWM_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// 使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
// 使能TIM1时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
// 配置GPIOA.8为复用推挽输出
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置TIM1的基本参数
TIM_TimeBaseStructure.TIM_Period = 999; // 设置周期为1000个计数单位
TIM_TimeBaseStructure.TIM_Prescaler = 71; // 设置预分频系数为72
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
// 配置TIM1的通道1为PWM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500; // 设置占空比为50%
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
// 使能TIM1
TIM_Cmd(TIM1, ENABLE);
}
int main(void)
{
// 初始化PWM
PWM_Init();
while (1)
{
// 在这里可以根据需要调整占空比
TIM_SetCompare1(TIM1, 250); // 设置占空比为25%
}
}
```
请注意,以上代码仅供参考,具体的配置和使用可能需要根据您的实际硬件和需求进行调整。
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