stm32f103 tim1 pwm
时间: 2023-09-29 07:10:49 浏览: 32
好的,以下是基于STM32F103C8T6芯片的TIM1 PWM初始化配置代码示例:
```c
#include "stm32f10x.h"
void TIM1_PWM_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = 1000-1; //设置计数周期
TIM_TimeBaseStructure.TIM_Prescaler = 72-1; //设置预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数器向上计数
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_Cmd(TIM1, ENABLE);
}
```
此代码将TIM1的CH1通道配置为PWM输出模式,并且输出的PWM波形的频率为1kHz,占空比可通过TIM1的CCR1寄存器进行设置。如果需要改变PWM波形的频率或占空比,只需修改计数周期和CCR1的值即可。同时,需要根据具体的硬件连接情况修改GPIO_Pin和GPIO_InitStructure成员的值。