main.h

我的一个工程

#include  "float.h"
float  temperature;
unsigned int code temper[100];
float AdValue = 0;
extern union p_temp
{
unsigned char c[2];
unsigned int X;
}upper_limit,lower_limit,difference;/*温度上限设定值，下限设定值，和偏差值*/
extern long float filter();
extern void display_humidity(void);
extern void KEY(void);
extern unsigned char AT24C02_Read_Byte(unsigned char Device,unsigned char Addr);
extern float process_t();
extern float AD590(void );
extern bit ADC  ;//通决定用那个通道采集和显示那个通道值