stm32 spwm 开关电源 控制代码
时间: 2023-10-07 19:12:03 浏览: 44
以下是一个用于控制STM32的SPWM开关电源的代码示例:
```c
#include "stm32f10x.h"
#define PWM_PERIOD 1000
#define DUTY_CYCLE 500
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// Enable GPIOA and TIM1 peripheral clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
// Configure PA8 as TIM1_CH1 output
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 to generate PWM output
TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD - 1;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = DUTY_CYCLE;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_Cmd(TIM1, ENABLE);
while (1)
{
// Your SPWM switching control logic goes here
}
}
```
在这个示例中,我们使用了STM32的TIM1定时器来生成PWM信号,并将其输出到PA8引脚上。我们设置了PWM周期为1000,占空比为50%。你需要修改占空比和周期来适应你的SPWM开关电源的需求。
最后,你需要在while循环中实现SPWM开关电源的控制逻辑。具体的控制逻辑将取决于你的应用场景和硬件设计。