Author Topic: LPC1768 + 2.8" TFT ILI9325  (Read 11458 times)

Offline Prakash

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LPC1768 + 2.8" TFT ILI9325
« on: July 30, 2010, 02:15:15 PM »
Hello all,

I have an LCD module TM240320B9NFWUGWC and it has inbuilt ILI9325
controller.
MPU-Interface Mode is through 8-bit parallel interface.

I'm trying to read its device code but its not working, I always
getting 0x0000. If any body can help on this, that will be very
appreciated.

My code is as follow
------------------------------------------------------------------
void TSLCDInit(void) //initial LCD
{
TSLCDOutIns(TS_INS_START_OSC);
driver_code = TSLCDInDat();
if (driver_code == 0x9320) //ILI9320
{
TSLCDInit9320();
}
else if (driver_code == 0x9325) //ILI9325
{
TSLCDInit9325();
}
}
--------------------------------------------------------------------
But I am getting driver_code = 0x0000

And my write command, write data and read data as follow

void TSLCDOutIns(unsigned short ins) //write instruction to LCD
{
LPC_PINCON->PINSEL0 &= ~(0xFFFF<<4);
LPC_GPIO0->FIODIR |= LCD_DATA_MASK;

LCD_CS_LOW();
LCD_RS_LOW();
LCD_RD_HIGH();

LCD_WR_HIGH();
LCD_WR_LOW();
delay_ms(1);
LPC_GPIO0->FIOPIN &= ~LCD_DATA_MASK;
LCD_WR_HIGH();

LCD_WR_LOW();
delay_ms(1);
LPC_GPIO0->FIOPIN |= ins<<2;
LCD_WR_HIGH();

delay_ms(1);
}

void TSLCDOutDat(unsigned short dat) //write data to LCD
{
LCD_RS_HIGH();
LCD_RD_HIGH();
LCD_WR_LOW();

LPC_PINCON->PINSEL0 &= ~(0xFFFF<<4);
LPC_GPIO0->FIODIR |= LCD_DATA_MASK;
LPC_GPIO0->FIOCLR = LCD_DATA_MASK;
LPC_GPIO0->FIOSET = (dat >> 8 ) << 2;

LCD_CS_LOW();
LCD_CS_HIGH();

LPC_GPIO0->FIOCLR = LCD_DATA_MASK;
LPC_GPIO0->FIOSET = dat << 2;

LCD_CS_LOW();
LCD_CS_HIGH();
LCD_WR_HIGH();

LPC_PINCON->PINSEL0 &= ~(0xFFFF<<4);
LPC_GPIO0->FIODIR &= ~LCD_DATA_MASK;
}

unsigned short TSLCDInDat(void) //read data from LCD
{
unsigned short retval = 0;

LPC_PINCON->PINSEL0 &= ~(0xFFFF<<4);
LPC_GPIO0->FIODIR &= ~LCD_DATA_MASK;

LCD_CS_LOW();
LCD_RS_HIGH();

LCD_RD_LOW();
delay_ms(1);
retval = (LPC_GPIO0->FIOPIN & LCD_DATA_MASK);
LCD_RD_HIGH();
delay_ms(1);

LCD_RD_LOW();
delay_ms(1);
retval = (retval << 8 ) | (LPC_GPIO0->FIOPIN & LCD_DATA_MASK);
LCD_RD_HIGH();
delay_ms(1);

LCD_CS_HIGH();

return retval;
}

Note: For data lines I am using P0.2 to P0.9 and that's why I am
shifting 'ins' and 'dat' left by 2.

-Prakash
9886545216