I have an issue with the display hanging intermittently. It keeps up communication with the computer, and acknowledges commands, but doesn't perform the commands as far as changing what's actually displayed on the screen. The display has to be power cycled to start working again.
Anything I can do anything about? (Except throwing it away ;-)
Using a LK202-25 display hooked up to an XScale processor over I2C through a Philips P82B96 I2C bus driver, and proper termination at both ends of the I2C bus. This enshures near perfect signal integrity as far as I can see on my scope screen. Problem occurs both at 100kHz and 400kHz.
LK202-25 hangs, keeps I2C communications
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peterverkaik
- LCD?
- Posts: 1
- Joined: Fri Dec 05, 2003 3:18 am
Re: LK202-25 hangs, keeps I2C communications
Hi,Jesper wrote:I have an issue with the display hanging intermittently. It keeps up communication with the computer, and acknowledges commands, but doesn't perform the commands as far as changing what's actually displayed on the screen. The display has to be power cycled to start working again.
Anything I can do anything about? (Except throwing it away ;-)
Using a LK202-25 display hooked up to an XScale processor over I2C through a Philips P82B96 I2C bus driver, and proper termination at both ends of the I2C bus. This enshures near perfect signal integrity as far as I can see on my scope screen. Problem occurs both at 100kHz and 400kHz.
I own a LK202A that is mounted in a PC bay insert. White text on blue background. I experience the same behaviour but I use an RS232 connection. After power up everything works fine and I can write text and
turn the backlight on and off. But when I instruct to turn backlight on with
a minutes parameter other than zero, then after the instructed time the
backlight turns off as it should, but I am unable to turn it back on, although
I keep receiving key presses from the keypad, so the communication is working.
I now workaround this by the use of a timer in my microcontroller.
regards peter