写一个stm32pwm调速程序
时间: 2023-11-12 11:04:40 浏览: 26
以下是一个基于STM32的PWM调速程序,用于控制电机的转速:
```
#include "stm32f10x.h"
#define TIM2_PERIOD 1000 // PWM周期为1000
uint16_t pwm_val = 0; // PWM占空比值
void TIM2_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); // 打开TIM2时钟
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); // 初始化PA0引脚为复用推挽输出
TIM_TimeBaseStructure.TIM_Period = TIM2_PERIOD - 1; // 设置PWM周期
TIM_TimeBaseStructure.TIM_Prescaler = 0; // 不分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; // 设置PWM模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_Pulse = pwm_val; // 设置PWM占空比
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_Cmd(TIM2, ENABLE);
}
int main(void)
{
TIM2_Configuration();
while (1)
{
// 通过改变PWM占空比值,控制电机的转速
pwm_val += 10;
if (pwm_val >= TIM2_PERIOD)
{
pwm_val = 0;
}
TIM_SetCompare1(TIM2, pwm_val);
Delay(1000);
}
}
void Delay(__IO uint32_t nCount)
{
for (; nCount != 0; nCount--);
}
```
注意将以上代码中的 `GPIO_Pin_0` 修改为你所使用的引脚号。该程序会不断地增加PWM占空比值,以增加电机的转速,直到达到PWM周期,然后重新开始。你可以根据实际需要修改程序,以控制电机的转速。