osd.rar_osd

/*AddLetters.c Author:RanGuanghong Date:2003.6.2 Vervion:1.0 Function: Ocsillor:12.00Mhz. CPU:w78e51 OSD device:uPD6453CY-001 OSD ocsillor:7.2Mhz,33pf. */ #include <reg51.h> #ifndef uchar #define uchar unsigned char #endif #ifndef uint #define uint unsigned int #endif #define ReloadTh1 0xf4 #define ReloadTl1 0xf4 /* I/O port. */ sbit Load=P1^0; sbit Sclk=P1^1; sbit BackGround=P1^2; sbit Busy=P1^3; sbit Clk=P1^4; sbit Cs=P1^5; sbit DataLine=P1^6; sbit Led=P1^7; /* Parramenters. */ uchar bdata Flags=0; sbit AddLetterFlag=Flags^0; uchar data ReloadTh0=0xff; uchar data ReloadTl0=0xbf; uchar data ColumCounter=0; uint data LedDelayTimer=65000; uchar data ByteCounter=0; uchar data DisplayControl=0; uchar data BackgroundControl=0; uchar data ProgressiveScanControl=0; uint data DisplayPositionControl=0; uint data CharacterWriteAddessControl=0; /* void Int1(void) */ void Int0(void) interrupt 0 { EX0=0; ET0=1; while(1); } /* void T0(void) */ void Timer0(void) interrupt 1 { TR0=0; ET0=0; while(1); } /* void Int0(void) */ void Int1(void) interrupt 2 { EX1=0; while(1); } /* void Timer1(void) */ void Timer1(void) interrupt 3 { TH1=ReloadTh1; TL1=ReloadTl1; while(1); } /* void SerialPort(void) */ void SerialPort(void) interrupt 4 { if(RI) { RI=0; } if(TI) { TI=0; } while(1); } /* void WriteByte(uchar x) */ void WriteByte(uchar x) { uchar i,j; j=x; while(Busy); for(i=0;i <8;i++) { Clk=0; j < <=1; DataLine=CY; Clk=1; } } /* void WriteOneByte(uchar x) */ void WriteOneByte(uchar x) { uchar i; i=x; Cs=0; WriteByte(i); while(Busy); Cs=1; } /* void WriteTwoByte(uint x) */ void WriteTwoByte(uint x) { uchar i; i=x/256; Cs=0; WriteByte(i); i=x%256; WriteByte(i); while(Busy); Cs=1; } /* void WriteSecondByte(uint x) */ void WriteSecondByte(uint x) { uchar i; i=x/256; Cs=0; WriteByte(i); i=x%256; WriteByte(i); WriteByte(i); while(Busy); Cs=1; } /* void WriteCharacterAddess(uchar x,uchar y,uchar Character) x=1~12; y=1~24; Character=0~255; */ void WriteCharacter(uchar x,uchar y,uchar Character) { uint i=0; i=i|0x8400; if(x> =0x10) { i=i|0x0100; } i=i|(x < <5); i=i|y; WriteTwoByte(i); i=0xca00; i=i|Character; WriteSecondByte(i); } void main(void) { uchar Temp=0; P0=0x00; P1=0xff; P2=0x00; P3=0xff; Load=1; Load=0; IP=0x00; IE=0x00; TMOD=0x25; TCON=0x05; PCON=0x00; SCON=0x00; TH0=ReloadTh0; TL0=ReloadTl0; TH1=ReloadTh1; TL1=ReloadTl1; ES=1; EX0=0; EA=1; while(1) { WriteOneByte(0x04); /*Display off,Osc on,Flink off.*/ WriteOneByte(0x40); /*No background.*/ WriteOneByte(0x1e); /*Background color:white.*/ WriteOneByte(0x30); /*Nomal TV scan.*/ WriteOneByte(0x34); /*Video RAM all reset.*/ WriteTwoByte(0x8088); /*Display position.*/ WriteCharacter(1,1,0x00); WriteCharacter(1,2,0x01); WriteCharacter(1,3,0x02); WriteCharacter(1,4,0x03); WriteCharacter(1,5,0x04); WriteCharacter(1,6,0x05); WriteCharacter(1,7,0x06); WriteCharacter(1,8,0x07); WriteCharacter(1,9,0x08); WriteCharacter(4,1,0x00); WriteCharacter(4,2,0x01); WriteCharacter(4,3,0x02); WriteCharacter(4,4,0x03); WriteCharacter(4,5,0x04); WriteCharacter(4,6,0x05); WriteCharacter(4,7,0x06); WriteCharacter(4,8,0x07); WriteCharacter(4,9,0x08); WriteCharacter(8,1,0x00); WriteCharacter(8,2,0x01); WriteCharacter(8,3,0x02); WriteCharacter(8,4,0x03); WriteCharacter(8,5,0x04); WriteCharacter(8,6,0x05); WriteCharacter(8,7,0x06); WriteCharacter(8,8,0x07); WriteCharacter(8,9,0x08); //WriteTwoByte(0x8800); /*Size,Smooth,Mask pule control.*/ WriteOneByte(0x0c); /*Display on,Osc on,Flink off.*/ Cs=0; while(1) { if(LedDelayTimer==0) { Led=~Led; LedDelayTimer=65000; } else { LedDelayTimer--; } } } }