main.h

这是一个用于视频切换的控制程序,采用AT89C51芯片,KEIL 51开发

//define the port

#define no_key 0
#define key1 1
#define key2 2
#define key3 3
#define key4 4
#define key5 5
#define key6 6
#define key7 7
#define key8 8
#define key9 9
#define key10 10
#define key11 11
#define key12 12
sbit A_4051 = P0^0;
sbit B_4051 = P0^1;
sbit C_4051 = P0^2;
sbit INH_1 = P0^3;   //video channel 1
sbit INH_2 = P0^4;   //video channel 2
sbit COLUMN1_PIN = P1^4; //key scan
sbit COLUMN2_PIN = P1^5;
sbit COLUMN3_PIN = P1^6;
sbit Auto_Flag = P1^7;
sbit LED_L=P2^4;
sbit LED_H=P2^5;
sbit scl=P0^6;  //24c02 SCL
sbit sda=P0^5;  //24c02 SDA
sbit DOG=P3^7;  //狗