ddc.c

LCD OSD 程序用於8051 開發lcd

#include "types.h"
#include "ms_reg.h"
#include "ms_rwreg.h"
#include "board.h"

#define CheckDDCAddr1	0x10
#define CheckDDCAddr2	0x20

BYTE code tDDC1[128] = 
{	 
#if Lego2
0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x40, 0x34, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, 
0x10, 0x0F, 0x01, 0x03, 0x68, 0x22, 0x1B, 0x14, 0xE8, 0x5A, 0x65, 0xA3, 0x5A, 0x47, 0x9A, 0x24, 
0x11, 0x50, 0x54, 0xBF, 0xEF, 0x00, 0x81, 0x80, 0x61, 0x4C, 0x3B, 0xCF, 0x31, 0x0A, 0x31, 0xCA, 
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x30, 0x2A, 0x00, 0x98, 0x51, 0x00, 0x2A, 0x40, 0x30, 0x70, 
0x13, 0x00, 0x52, 0x0E, 0x11, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00, 0xFE, 0x00, 0x0A, 0x20, 0x20, 
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xFD, 0x00, 0x38, 
0x4B, 0x1F, 0x51, 0x0E, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xFC, 
0x00, 0x4C, 0x43, 0x44, 0x20, 0x4D, 0x4F, 0x4E, 0x49, 0x54, 0x4F, 0x52, 0x0A, 0x20, 0x00, 0x14

#endif
};
void mStar_WriteDDC(BYTE ddcNo, BYTE *dataTbl, BYTE num)
{
#if 1
  BYTE i,Data;

  ddcNo = 0;
  IICCTR |= 0x80;		// enable DDC2 
  //DDCCTR = 0x50;		// disable DDC1; enable DDC write
    DDCCTR=0x90;//ONLY128|DDC1EN;


  for (i = 0; i < num; i++)
    { Data = *(dataTbl+i);	// get data from ROM of MCU
	*(&DDCRAM+i)= Data;	// set EDID code to RAM of DDC
    }	                                   
  SLVAADR = 0xD0;	// Enable DDC, slave address = 0xA0, Enable DDC function 
#else
  WORD i;
  BYTE ddcValue;
  mStar_WriteByte(ddcNo, 0);//DDCEN1/2 disable ddc function

  // Check DDC has been programmed
  mStar_WriteByte(ddcNo+2, CheckDDCAddr1|0x80); //DDCADDR1/2
  ddcValue=mStar_ReadByte(ddcNo+3); // DDCDATA1/2
  if (ddcValue==*(dataTbl+CheckDDCAddr1))
    { mStar_WriteByte(ddcNo+2, CheckDDCAddr2|0x80); //DDCADDR1/2
      ddcValue=mStar_ReadByte(ddcNo+3); // DDCDATA1/2
      if (ddcValue==*(dataTbl+CheckDDCAddr2))
      	return;
    }
  // program ddc content
  for (i=0; i<num; i++)
    { mStar_WriteByte(ddcNo+2, i); //DDCADDR1/2
      mStar_WriteByte(ddcNo+3, *(dataTbl+i)); // DDCDATA1/2
    }
  mStar_WriteByte(ddcNo, D_EN_B);// enable ddc function
#endif
}

void mStar_WriteDDC1(void)
{ mStar_WriteDDC(DDCEN1, &tDDC1, sizeof(tDDC1));
}
void mStar_WriteDDC2(void)
{ //mStar_WriteDDC(DDCEN2, &tDDC1, sizeof(tDDC1));
}