单片机红外接近开关制作简易版

测试效果

程序源码

 

主程序

#include "stm32f10x.h"                  // Device header
#include "Delay.h"                  
#include "OLED.h" 
#include "PWM.h"
//#include "IC.h"

int main(void)
{
    OLED_Init();
    PWM_Init();
//    IC_Init();
    
    OLED_ShowString(1,1,"Freq:00000Hz");
    
    PWM_SetPrescaler(720 - 1);                                //Freq = 72M / (PSC+1) / (ARR+1)            
    PWM_SetCompare1(50);                                            //Duty = CCR     / 100    
    
        while (1)
        {
//                OLED_ShowNum(1, 6, IC_GetFreq(), 5);
        }
}

 

 

PWM.H

 

#ifndef __PWM__H
#define __PWM__H

void PWM_Init(void);
void PWM_SetCompare1(uint16_t Compare);
void PWM_SetPrescaler(uint16_t Prescaler);

#endif

 

 

PWM.C

 

#include "stm32f10x.h"                  // Device header

void PWM_Init(void)
{

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    
//    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);    //重映射到PA15端口
//    GPIO_PinRemapConfig(GPIO_PartialRemap1_TIM2,ENABLE);
//    GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
    
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;        //GPIO_Pin_15
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
    
    TIM_InternalClockConfig(TIM2);
    
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStructure.TIM_Period = 100 - 1;                //ARR
    TIM_TimeBaseInitStructure.TIM_Prescaler = 720 - 1;            //PSC
    TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);
    
    TIM_OCInitTypeDef TIM_OCInitStructure;
    TIM_OCStructInit(&TIM_OCInitStructure);
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0;  //CCR
    TIM_OC1Init(TIM2,&TIM_OCInitStructure);
    
    TIM_Cmd(TIM2, ENABLE);
}

void PWM_SetCompare1(uint16_t Compare)
{
        TIM_SetCompare1(TIM2,Compare);
}

uint16_t Timer_GetCounter(void)
{
        return TIM_GetCounter(TIM2);
}

void PWM_SetPrescaler(uint16_t Prescaler)
{
        TIM_PrescalerConfig(TIM2, Prescaler, TIM_PSCReloadMode_Immediate);
}
 

 

创作不易，喜欢就支持一下作者吧！