LCDInfo.com

Henri,

I am using C for microcontroller in AT89C52 to program PG24064LRS but I don´t obtain success in the process of reading data. I need to read data to confirm that the LCD is operating normaly, it were not reset or had error in the process of the data write.
I put one part of my program's code.


EnviaMensagemLCDGrafico(gscMsgTestLCD);
StatusCheck(1);
DADOLCD = CODTESTLCD; // Put Data in the ports
StatusCheck(1);
COMMLCD = 0xC4; // Command Write Data
StatusCheck(1);
EnviaMensagemLCDGrafico(gscMsgTestLCD);
StatusCheck(1);
EA = 0; // Desable all interrupts
COMMLCD = 0xC5; // Read Data
if(DADOLCD != CODTESTLCD) // Case Data Read is equal Data Write
{
InicitiateGraphicLCD(); // Reset and initiate LCD
}
EA = 1; // Enable all interrupts

I moved this topic here as I don't think this has much to do with LCDInfo.

Is the controller in your display T6963C ?
I don't have experience with reading data from display so I can't really give much help but have you looked at this pdf: http://www.skippari.net/lcd/t6963c.pdf ?
It has the timings for reading and writing.

And one more thing: are you writing and reading from the same place in memory ? What are exactly the results you are having, don't you get the right data or don't you get data at all ?

This display use T6963C and have 240x64 bits (pixels).

This example show that I write and read same place in display memory. COMMLCD = 0xC4 it execute command write without increment counter of position. Command COMMLCD = 0xC5 Read data in memory (as show datasheet) but I don´t read correctly another data. Command EnviaMensagemLCDGrafico(gscMsgTestLCD) put counter position in address for write or read data. The connective if(DADOLCD != CODTESTLCD) verify process write/read and, case it occurs error reset LCD, executing command InicitiateGraphicLCD()
First Write/Read is OK but others proccess don´t is correct.