reading device code from ILI9320 GLCD controller

hello all,

I have an LCD module Wistron Opt 145710-A but couldn't find any datasheet for it. I tried many initializing codes and fortunately it worked with a code for ILI9320 or ILI9325. I'm trying to read its device code to know weather it is 9320 or 9325 but only this part of my code is not working, I aloways get 0x0000. If any body can help on this, that will be very appreicated. my code I use to read the device code is as bellow.


//******************** LCD code ************************************
Initialize();
LCD_Reset(); // this is working when displying a picture

LCD_SetReg(0x00,0x00,0x01); // Start internal oscillator
delay_ms(50);

for (i=0;i <2;++i)
{
LCD_ReadDeviceCode(); // this never worked ???????????????????????????
Delay_ms(500);
}

LCD_Init(); // this function is working when displying a picture
LCD_FillScreen(BRIGHTGREEN); // this works also

//*****************************************************************
void LCD_ReadDeviceCode() // Expect 9325h or 9320h
{
LCDCS=0;
OutLoByte=0; // OutLoByte=PORTB
OutHiByte=0; // OutHiByte=PORTD
LCDRS=0; // Write to index reg
LCDWR=0;
delay_ms(10);
LCDWR=1;
LCDRS=1;
LCDRD=0;
delay_ms(10);

UART1_Write(OutLoByte); // try now
UART1_Write(OutHiByte);

LCDRD=1;
UART1_Write(OutLoByte); // try again
UART1_Write(OutHiByte);
LCDCS=1;
}
void Initialize()
{
ADCON1= 0x06; //Configure PORTA as Digital port
TRISA =0; // A as outputs
TRISB =0; // B as outputs
TRISD =0; // D as outputs

PORTA = 0b111111; // all are high
PORTB = 0;
PORTD = 0;

INTCON = 0b11000000; // Enable GIE, PEIE
PIE1= 0b00100000; // Enable RCIE, desable TXIE
PIE2= 0; // Desable eeprom int
PIR1 =0; // Clear all int flags
PIR2 =0; // Clear all int flags
}