763 views

Setup of S64128K

Categories > S64128K/L/M

Page 1

1–5

frank_aloe

rookie - member

2 posts

0 permalink

I'm not getting anything on the screen and I am suspecting it is my setup code.

I have the display connected per the diagram provided on your web site. All the caps are 1uF ceramics. The C86 and P/S are connected to 3.3VDC so we have the device in 6800 mode.

I noticed that on caps between VSS and VOUT is about 3.3V.
CAP3, CAP1 and CAP2 also have approx 3V on them.

But V0 thru V4 are all at 0V.

// ************************************************ //
// write command routine
// ************************************************ //
void WriteCommand(void)
{
BYTE yy;
DISPLAY_CS = 0;
DISPLAY_A0 = 0;
DISPLAY_WR = 0;
DISPLAY_RD = 0;
for(yy=0;yy<=200;yy++){}
DISPLAY_CS = 1;
DISPLAY_A0 = 0;
DISPLAY_WR = 1;
DISPLAY_RD = 0;
for(yy=0;yy<=200;yy++){}
}
// ************************************************ //
// write command routine
// ************************************************ //
void WriteData(void)
{
BYTE yy;
DISPLAY_CS = 0;
DISPLAY_A0 = 1;
DISPLAY_WR = 0;
DISPLAY_RD = 0;
for(yy=0;yy<=200;yy++){}
DISPLAY_CS = 1;
DISPLAY_A0 = 1;
DISPLAY_WR = 1;
DISPLAY_RD = 0;
for(yy=0;yy<=200;yy++){}
}
// ************************************************ //
// initialize the display
// ************************************************ //
void Init_Display(void)
{
unsigned short u;
DISPLAY_RES = 0;
for(u=0;u<=10000;u++){}
DISPLAY_RES = 1;
for(u=0;u<=10000;u++){}

  WriteValue(0xA2);  // write bias
  WriteCommand();
// adc select
  WriteValue(0xA0);  // ADC Normal
  WriteCommand();
// set coms
  WriteValue(0xC8);
  WriteCommand();
// set voltages
  WriteValue(0x25);  // voltage ratio
  WriteCommand();
// set volume mode
  WriteValue(0x81);  // voltage mode
  WriteCommand();
// voltage set
  WriteValue(0x20);  // voltage set
  WriteCommand();
// set booster
  WriteValue(0xF8);   // voltage boost ratio
  WriteCommand();
  WriteValue(0x00);
  WriteCommand();


// power setting
  WriteValue(0x28 + 7);
  WriteCommand();
// start line
  WriteValue(0x40);
  WriteCommand();
// page address
  WriteValue(0xB0);
  WriteCommand();
// column address high
  WriteValue(0x10);
  WriteCommand();
// column address low
  WriteValue(0x00);
  WriteCommand();
// display reverse
  WriteValue(0xA7);
  WriteCommand();
// display normal
  WriteValue(0xA6);
  WriteCommand();
// display on
  WriteValue(0xAF);
  WriteCommand();
// display all on
  WriteValue(0xA5);
  WriteCommand();

}

any help would be appreciated