STM32测量甲醛（标准库）

前面上传了一个HAL库版本的，现在上传一个标准库版本的，同样是使用STM32测量甲醛。用到的模块有STM32C8T6最小系统板，一个LCD1602液晶显示屏，一个ZE08-CH2O甲醛模组，还有蜂鸣器、按键、指示灯等。可以通过按键调整甲醛超标的阈值，当测量的甲醛值超过设置的阈值时，蜂鸣器会报警，相应的指示灯也会闪烁。

下面是main.c文件的代码

#include "stm32f10x.h"
#include "lcd.h"
#include 
#include "led.h"
#include "deputy.h"
#include "sys.h"
#include "delay.h"
#include "stmflash.h"

#define beep PBout(0)

void KEY_Scan(void);
u8 KEY_scan(u8 mode);
unsigned char Uart1_Buff[1024];   //串口1缓冲数组
unsigned char Uart1_Count=0;      //串口1累加变量
u8 state=0,s0=0,right=0,count=0;

float result=0.0000;
float table=0.70;
int pm25Value;
u8 str[] = " CH2O_H        ";
u8 showBuffer[9] = {0};
uint8_t key1_flag=0,key2_flag=0,key3_flag=0,memory_flag=0;
uint8_t sec1=0,sec2=0;
uint32_t Tim_ms=0;

int main(void)
{
	delay_init();	
	GPIO_init();
	LCD1602_Init();
	TIM2_Int_Init(4999,7199);	//10Khz,计数到5000是500ms
	TIM3_Int_Init(499,7199);	//定时器3 50ms中断一次
	
	sprintf((char*)showBuffer,"CH2O:%1.4fmg/m3",result);    
	LCD1602_Show_Str(0, 0, (unsigned char *)showBuffer);
	sprintf((char*)str,"CH2O_H:%1.2fmg/m3",table);
	LCD1602_Show_Str(0, 1, (unsigned char *)str);
	GPIO_ResetBits(GPIOB,GPIO_Pin_10);
	GPIO_SetBits(GPIOB,GPIO_Pin_11);
	//Test_Write(0x08009106,(float)0.55);
	table=STMFLASH_ReadHalfWord(0x08009106)/256.;
	
	while(1)
	{			
		if(right==1)
		{
			right=0;
			pm25Value = Uart1_Buff[4]*256 + Uart1_Buff[5];
			result = pm25Value / 66.64 * 0.08;
			sprintf((char*)showBuffer,"CH2O:%1.4fmg/m3",result);    
			LCD1602_Show_Str(0, 0, (unsigned char *)showBuffer);	
		}
		if(memory_flag)
		{
			memory_flag=0;
			Test_Write(0x08009106,table*256.);
		}		
	}	
}

void KEY_Scan(void)
{
	if(KEY1==0)
	{			
			state=(state+1)%2;
					
	}while(!KEY1);	
	if(KEY2==0)
	{
		if(key2_flag==1)
		{
			key2_flag=0;
			if(state==1)
			{
				table+=0.01;
			}
		}
		if(sec1==0)
		{
			if(state==1)
			{
				 table+=0.01;
			}
		}
	}
	else
	{
		sec1=3;
		if(key2_flag==0)
		{
			key2_flag=1;
			memory_flag=1;			
		}	
	}
	if(KEY3==0)
	{
		if(key3_flag==1)
		{
			key3_flag=0;
			if(state==1)
			{
				if(table>0) table-=0.01;
			}
		}
		if(sec2==0)
		{
			if(state==1)
			{
				if(table>0) table-=0.01;
			}
		}
	}
	else
	{
		sec2=3;
		if(key3_flag==0)
		{
			key3_flag=1;
			memory_flag=1;			
		}
	}
}

void TIM2_IRQHandler(void)   //TIM2中断
{
	if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)  //检查TIM2更新中断发生与否
	{
		TIM_ClearITPendingBit(TIM2, TIM_IT_Update);  //清除TIM2更新中断标志
	
		if(result > table)
		{                         
			beep=!beep;
			GPIO_SetBits(GPIOB,GPIO_Pin_10);//红灯灭，绿灯亮
			GPIO_ResetBits(GPIOB,GPIO_Pin_11);		
		}else
		{
			GPIO_ResetBits(GPIOB,GPIO_Pin_0);
			GPIO_ResetBits(GPIOB,GPIO_Pin_10);
			GPIO_SetBits(GPIOB,GPIO_Pin_11);
		}			
		if(sec1!=0) sec1--;
		if(sec2!=0) sec2--;
	}
}

void TIM3_IRQHandler(void)   //TIM3中断
{
	if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)  
	{
		TIM_ClearITPendingBit(TIM3, TIM_IT_Update); 
			
		KEY_Scan();
		Tim_ms++;
		if(Tim_ms%10==0)
		{
			if(s0==1) 
				s0=0;
			else 
				s0=1;
		}
		if(state==1&&s0)
		{			
			sprintf((char*)str,"CH2O_H:    mg/m3");
			LCD1602_Show_Str(0, 1, (unsigned char *)str);				
		}	else{
		sprintf((char*)str,"CH2O_H:%1.2fmg/m3",table);
		LCD1602_Show_Str(0, 1, (unsigned char *)str);
		}
	}
}

需要原理图和全部源码的朋友可以通过下面的链接下载：
程序源码