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 <stdio.h>
#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500msTIM3_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