stm32f103zet6pwm输出方波
时间: 2023-10-02 09:10:54 浏览: 273
stm32产生方波信号
要使用STM32F103ZET6的PWM输出方波,需要按照以下步骤进行操作:
1. 配置GPIO引脚为PWM输出模式。
2. 配置TIM(定时器)为PWM模式。
3. 设置TIM的计数周期和占空比,以生成所需的方波。
下面是一个简单的示例代码,可以输出100Hz的50%占空比方波:
```c
#include "stm32f10x.h"
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// Enable clock for GPIOA and TIM1
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE);
// Configure PA8 as alternate function (TIM1_CH1)
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);
// Configure TIM1 as PWM mode 1
TIM_TimeBaseStructure.TIM_Period = 7199; // 72MHz / 7200 = 10kHz
TIM_TimeBaseStructure.TIM_Prescaler = 0;
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 = 3600; // 50% duty cycle
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_Cmd(TIM1, ENABLE);
while (1) {
// Do nothing
}
}
```
在这个示例代码中,我们使用PA8作为PWM输出引脚,TIM1作为定时器,以10kHz的频率输出50%的占空比方波。你可以根据需要调整计数周期和占空比来生成不同频率和占空比的方波。
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