Hello,

As mentionned in the subject, after I update the firmware version of the GLT240128-WB from FIRMWARE-8.4 to FIRMWARE-8.6, it stopped responding.
I am currently using a microcontroller to send data via serial RS232 protocol at 19200baud.
PCB Rev. seems to be "4.0".
I just wanted to know what ...

Hey Daniel,

It is now fully operational. Here's my code basically.

Init();

LCD_Clear();

LCD_Write_char(0xFE); //
LCD_Write_char(0x3F); // CTRL CMD
LCD_Write_char(0x02); // HW Flow Control Enabled.

LCD_Write_char(0xFE); // HW Flow Control Trigger Level.
LCD_Write_char(0x3E); // Pas ...

Hi Daniel,

Thank you for the well explained clarification and with examples!!
Because I read on other posts that even at 115k Baudrate it will be hard to saturate the 128 bytes buffer of the unit.
So I was a little confused. Also it confused me to limit the holding bytes up to 14, but not anymore ...

Hey Daniel,

Ahhh It was actually a problem on my end, somehow i added a Clear Screen AFTER I just wrote the new text in my Refresh Display Interrupt Sub Routine. However, about the Flow Control Level Trigger Level 3 (14 bytes) can you explain a bit more on what is the meaning of 14bytes? Do i have ...

Hey Daniel,

It went great!! I now have control over the flow.

Set the Flow Control Mode to Hardware, // see ctrl cmd 1.5
Set the Flow Control Trigger Level to 3 // see ctrl cmd 1.6 ,
Clear RTS pin (Host to GLT240128) // Holding data,
do stuff... LCD gets press events....
delay_3sec
Set RTS pin ...

Hello Daniel,

Thank you for the quick reply from email AND forum.
The suggested method is what I was looking for!!

I will let you know how it went.

Thanks!!

Eddy

Hello,

I am using a GLT240128 Rev 8.4, PCB Rev 1.0 with RS232 protocol @ 19.2k baudrate.
Every time i press the defined region, a response is sent back immediately, no problem there.
I tried using Hardware Flow Control with 14bytes buffer and/or disabling auto-transmit off to
enter polling mode ...