自带程序（Built-in program）.doc

自带程序（Built-in program） 6.4 traffic lights program /*********************************************************** Intersection traffic lights control C program ***********************************************************/ #include reg51.h #define uchar unsigned char #define uint unsigned int /***** definition control *******************************************/ Sbit Time_Show_LED2=P2^5; //Time_Show_LED2 (direct line time display) control bit Sbit Time_Show_LED1=P2^4; //Time_Show_LED1 (direct line time display) control bit Sbit EW_LED2=P2^3; //EW_LED2 control bit Sbit EW_LED1=P2^2; //EW_LED1 control bit Sbit SN_LED2=P2^1; //SN_LED2 control bit Sbit SN_LED1=P2^0; //SN_LED1 control bit Sbit SN_Yellow=P1^6; //SN yellow light Sbit EW_Yellow=P1^2; //EW yellow light Sbit EW_ManGreen=P3^0; //EW sidewalk green light Sbit SN_ManGreen=P3^1; //SN sidewalk green light Sbit Special_LED=P2^6; / / traffic lights Sbit Busy_LED=P2^7; / / traffic lights Sbit Nomor_Button=P3^5; / / normal traffic button Sbit Busy_Btton=P3^6; / / busy button Sbit Special_Btton=P3^7; / / special key traffic Sbit EW_ManRed=P3^3; //EW sidewalk red light Sbit SN_ManRed=P3^4; //SN sidewalk red light Bit Flag_SN_Yellow; //SN yellow light flag bit Bit Flag_EW_Yellow; //EW yellow light flag bit Char Time_EW; / / west direction countdown unit Char Time_SN; / / south direction countdown unit Uchar EW=60, SN=40, EWL=19, SNL=19; / / initialize assignment, normal mode Uchar EW1=60, SN1=40, EWL1=19, SNL1=19; / / for modifying the value of variables Uchar, code, table[10]={0x3F, 0x06,0x5B, 0x4F, 0x66,0x6D, 0x7D, 0x07,0x7F, 0x6F}, //0-9 segment code Uchar code S[8]={0x28,0x48,0x18,0x48,0x82,0x84,0x81,0x84}; / / traffic lights control code /********************** delay subroutine **************************/ Void Delay (uchar a) { Uchar i; I=a; While (i--) {} } /***************** display function ******************************/ Void Display (void) { Uchar, h, l; H=Time_EW/10; L=Time_EW%10; P0=table[l]; EW_LED2=1; / / EW_LED2