Any knon timing probs on LK202-24-USB ?

[roloff]

Dear all,

i have writen an application to init the lcd. Here some commands are send to the lcd.
* define some custom chars for the boot display
* define the text of the boot display.
* set startup values and current values for the GPO's (fan)

sometimes some garbadge chars are displayed on the lcd, but i just send commands.
For testing i put a sleep for one second after each command to see which command produce the chars on the lcd. But with the sleeps i see none of them.
Are there any timing problems ? Dose the write to the non violate mem takes some time and if i send too fast (19200 bps no handshake) the command 0xFE byte of the next command get lost. So the rest of the command is printed ?

Am I right - there is no flow control for USB ?

Thanks

Dirk

[roofrack]

Dirk,

I'm having a similar problem with the command to initialize the start-up display on an LK-202-24-USB. I get corrupted characters, and have only managed to get this command to work twice (cleanly) - but I don't know how I did it.

I'm still looking for an answer to this one.

Gary.

[Henry]

try putting a 20mS delay between the characters you are uploading for the Start Up screen.