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 Posted: Jul 19, 2012 - 06:09 PM |
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Joined: Feb 14, 2011
Posts: 22
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Hi.
I'm currently using a LCD with this driver, ILI9341 and I'm trying to interface it in 8080 16-bit mode.
Does anyone has a library or at least some initialization routine working?
Thank you. |
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Posted: Jul 19, 2012 - 07:24 PM |
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Joined: Sep 04, 2002
Posts: 21257
Location: Orlando Florida
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| Its in the Atmel Software foundation! Must be a UC3 board with that controller. |
_________________
Imagecraft compiler user
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Posted: Jul 19, 2012 - 11:50 PM |
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Joined: Mar 28, 2001
Posts: 20353
Location: Sydney, Australia (Gum trees, Koalas and Kangaroos, No Edelweiss)
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Posted: Jul 20, 2012 - 07:44 AM |
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Joined: Jan 23, 2004
Posts: 9825
Location: Trondheim, Norway
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Quote:
Its in the Atmel Software foundation! Must be a UC3 board with that controller.
Actually it's working with SAM, UC3 and XMEGA controllers. The driver is designed to be SPI compatible only, but you can probably just alter the byte write routine for parallel interface writes.
- Dean  |
_________________
Atmel Studio 6.1 is now released, grab it here.
Report AS6/ASF bugs here.
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Posted: Jul 20, 2012 - 09:41 AM |
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Joined: Feb 14, 2011
Posts: 22
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Thank you for your answers, but I had already tried those libraries without success. 
I have no idea what I'm doing wrong. I have already used some LCDs in the past but this one doesn't want to do its job.  |
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Posted: Jul 20, 2012 - 10:15 AM |
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Joined: Jan 23, 2004
Posts: 9825
Location: Trondheim, Norway
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It's an absolute PAIN of a controller, it took me many iterations to get it to actually work. Have you checked the configuration lines to the controller to ensure its in the correct mode? Do you get any activity at all?
- Dean |
_________________
Atmel Studio 6.1 is now released, grab it here.
Report AS6/ASF bugs here.
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Posted: Jul 20, 2012 - 10:47 AM |
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Joined: Feb 14, 2011
Posts: 22
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The only activity I'm getting is when i turn the backlight on. 
When you say configuration lines you're talking about IM[0..3] pins right? I'm not sure as I only have access to IM0.
Right now I'm trying to convert the ASF library from serial to parallel. If I'm successful i'll post it here. |
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Posted: Jul 20, 2012 - 11:46 AM |
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Joined: May 02, 2007
Posts: 3010
Location: Nieuwegein, Netherlands
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why not use serial to see if it works all together? then convert to parallel...
at this point you probably do not even know the display works at all....
and what controller are you actually using? that could also trigger more direct questions on you version of the code.
regards |
_________________
1)Datasheet and application notes checked?
2)tutorial forum
3)Newbie start here
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Posted: Jul 20, 2012 - 12:47 PM |
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Joined: Feb 14, 2011
Posts: 22
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| I'm using an ATxmega 128A1 but I don't have access to the serial pins only the parallel ones, so I can't use serial to test if the display is working. |
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Posted: Jul 20, 2012 - 01:04 PM |
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Joined: Jan 23, 2004
Posts: 9825
Location: Trondheim, Norway
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Yes, you need to know what the other IMx pins are connected to - otherwise the controller may be in a completely different state than what you think it is.
- Dean |
_________________
Atmel Studio 6.1 is now released, grab it here.
Report AS6/ASF bugs here.
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Posted: Jul 26, 2012 - 04:20 PM |
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Joined: Feb 14, 2011
Posts: 22
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I've decided to use 8-bit mode instead of 16-bit, although I'm not seeing any interaction in both modes.
Is there anyone who has access to this LCD and can test my code? I'm not sure what I'm doing wrong. Thank you.
Code:
void TFT_WriteCommand(unsigned char commandToWrite )
{
RD_HIGH;
COMMAND_MODE;
CS_LOW;
WR_LOW;
_delay_us(WAIT_TIME);
LSB_PORT = commandToWrite;
_delay_us(WAIT_TIME);
WR_HIGH;
DATA_MODE;
}
void TFT_WriteData( unsigned char dataToWrite )
{
RD_HIGH;
DATA_MODE;
CS_LOW;
WR_LOW;
_delay_us(WAIT_TIME);
LSB_PORT= dataToWrite;
_delay_us(WAIT_TIME);
WR_HIGH;
}
void TFT_Init(void)
{
// VCI=2.8V
//************* Reset LCD Driver ****************//
//Hardware reset
RST_HIGH;
_delay_ms(200);
RST_LOW;
_delay_ms(200);
RST_HIGH;
_delay_ms(200);
//Software Reset
TFT_WriteCommand(0x01);
CS_HIGH;
_delay_ms(1000);
//************* Start Initial Sequence **********//
//Power control A
TFT_WriteCommand(0xCB);
TFT_WriteData(0x39);
TFT_WriteData(0x2C);
TFT_WriteData(0x00);
TFT_WriteData(0x34);
TFT_WriteData(0x02);
CS_HIGH;
//Power control A
TFT_WriteCommand(0xCF);
TFT_WriteData(0x00);
TFT_WriteData(0XC1);
TFT_WriteData(0X30);
CS_HIGH;
//Driver timing control A
TFT_WriteCommand(0xE8);
TFT_WriteData(0x85);
TFT_WriteData(0x00);
TFT_WriteData(0x78);
CS_HIGH;
//Driver timing control B
TFT_WriteCommand(0xEA);
TFT_WriteData(0x00);
TFT_WriteData(0x00);
CS_HIGH;
//Power on sequence control
TFT_WriteCommand(0xED);
TFT_WriteData(0x64);
TFT_WriteData(0x03);
TFT_WriteData(0X12);
TFT_WriteData(0X81);
CS_HIGH;
//Pump ratio control
TFT_WriteCommand(0xF7);
TFT_WriteData(0x20);
CS_HIGH;
//Power Control 1
TFT_WriteCommand(0xC0);
TFT_WriteData(0x23);
CS_HIGH;
//Power Control 2
TFT_WriteCommand(0xC1);
TFT_WriteData(0x10);
CS_HIGH;
//VCOM Control 1
TFT_WriteCommand(0xC5);
TFT_WriteData(0x2B);
TFT_WriteData(0x2B);
CS_HIGH;
//Memory Access Control
TFT_WriteCommand(0x36);
TFT_WriteData(0x48);
CS_HIGH;
//Frame Rate Control (In Normal Mode/Full Colors)
TFT_WriteCommand(0xB1);
TFT_WriteData(0x00);
TFT_WriteData(0x1B);
CS_HIGH;
//Display Function Control
TFT_WriteCommand(0xB6);
TFT_WriteData(0x0A);
TFT_WriteData(0x02);
CS_HIGH;
//Enable 3G
TFT_WriteCommand(0xF2);
TFT_WriteData(0x02);
CS_HIGH;
//COLMOD: Pixel Format Set
TFT_WriteCommand(0x3a);
TFT_WriteData(0x05);
CS_HIGH;
//Gamma Set
TFT_WriteCommand(0x26);
TFT_WriteData(0x01);
CS_HIGH;
//Positive Gamma Correction
TFT_WriteCommand(0xE0);
TFT_WriteData(0x0F);
TFT_WriteData(0x31);
TFT_WriteData(0x2B);
TFT_WriteData(0x0C);
TFT_WriteData(0x0E);
TFT_WriteData(0x08);
TFT_WriteData(0x4E);
TFT_WriteData(0xF1);
TFT_WriteData(0x37);
TFT_WriteData(0x07);
TFT_WriteData(0x10);
TFT_WriteData(0x03);
TFT_WriteData(0x0E);
TFT_WriteData(0x09);
TFT_WriteData(0x00);
CS_HIGH;
//Negative Gamma Correction
TFT_WriteCommand(0XE1);
TFT_WriteData(0x00);
TFT_WriteData(0x0E);
TFT_WriteData(0x14);
TFT_WriteData(0x03);
TFT_WriteData(0x11);
TFT_WriteData(0x07);
TFT_WriteData(0x31);
TFT_WriteData(0xC1);
TFT_WriteData(0x48);
TFT_WriteData(0x08);
TFT_WriteData(0x0F);
TFT_WriteData(0x0C);
TFT_WriteData(0x31);
TFT_WriteData(0x36);
TFT_WriteData(0x0F);
CS_HIGH;
// Sleep Out
TFT_WriteCommand(0x11);
CS_HIGH;
_delay_ms(120);
//Display On
TFT_WriteCommand(0x29);
CS_HIGH;
}
void TFT_DrawPixel(uint16_t x, uint16_t y, uint16_t color)
{
TFT_SetWindow(x, x, y, y);
TFT_WriteData((unsigned char )((color>>8)&0xff));
TFT_WriteData((unsigned char )(color&0xff));
CS_HIGH;
}
void TFT_SetWindow(unsigned short x0, unsigned short y0,
unsigned short x1, unsigned short y1)
{
TFT_WriteCommand(ILI9341_CMD_COLUMN_ADDRESS_SET);
TFT_WriteData((x0 >> 8) & 0xFF);
TFT_WriteData(x0 & 0xFF);
TFT_WriteData((y0 >> 8) & 0xFF);
TFT_WriteData(y0 & 0xFF);
CS_HIGH;
TFT_WriteCommand(ILI9341_CMD_PAGE_ADDRESS_SET);
TFT_WriteData((x1 >> 8) & 0xFF);
TFT_WriteData(x1 & 0xFF);
TFT_WriteData((y1 >> 8) & 0xFF);
TFT_WriteData(y1 & 0xFF);
CS_HIGH;
TFT_WriteCommand(ILI9341_CMD_MEMORY_WRITE);
CS_HIGH;
}
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Posted: Aug 03, 2012 - 11:19 AM |
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Joined: Feb 14, 2011
Posts: 22
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I've discovered my problem, it was a faulty LCD  .
As promised here is a simple initialization and a draw pixel function in 8080 16-bit mode. |
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