pirate
Guest
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 Posted:
Mon Feb 14, 2005 12:42 pm Post subject:
TL16C752B problem |
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Hi,
I'm not sure this is the right group but if anybody can suggest another
group I'll be grateful.
I'm working on interfacing TMS320LF2407A microcontroller with the UART
TL16C752B.I have got it working relatively well. Sending is working
100% but there is some error with receiving.
The interfaceis for a serial LCD-keypad. The UART is configured in
FIFO mode with the trigger level set to 4 bytes. The processor sends a
scan key instruction and the keypad returns a character corresponding
to the key pressed. Till this stage everything works well. But some
time later after the character has been received, the UART returns 3
instances of the same character that has been received earlier without
any key being pressed at that time. I checked the LCDkeypad and it is
not sending anything, but the UART receive buffer gets filled with the
3 instances and the RXRDY interrupt goes low. Is it a problem with the
UART initialization or with the IC?
Has anyone else noticed this extra character behavior and solved the
problem
somehow??
pradeep@rtimes.com
http://www.rtimes.com
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