我想把stm32f103c8t6的TIM1当作通用定时器输出pwm信号,写一段代码示例
时间: 2023-05-12 14:05:21 浏览: 96
当然,我可以为您提供一个示例代码,如下所示:
#include "stm32f10x.h"
void TIM1_PWM_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
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);
TIM_TimeBaseStructure.TIM_Period = 999;
TIM_TimeBaseStructure.TIM_Prescaler = 71;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_Cmd(TIM1, ENABLE);
}
int main(void)
{
TIM1_PWM_Init();
while (1)
{
// do something
}
}
这段代码可以将 TIM1 配置为通用定时器,并输出 PWM 信号。其中,TIM1 的时钟频率为 72MHz,预分频系数为 71,计数器周期为 1000,占空比为 50%。GPIOA 的 Pin8 被配置为复用推挽输出模式,用于输出 PWM 信号。