In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdodds wrote:

:redface:  HELP!
I need to have a time delay before sending a character string at powerup as part of my application. When I added the PAUSE statement to my code to get the delay, I kept getting a garbled initial character. After a lot of trial and error, I pared the code down to a bare minimum and found that if the PAUSE comes first, there is a garble every time on powerup, and if the SEROUT comes first, there is never a garbled initial character. Here is my test code:

 

This works just fine:

 

DEVICE          SX28, OSCXT2, TURBO, STACKX, OPTIONX, BOR26
IRC_CAL  IRC_SLOW
FREQ            20_000_000

PROGRAM START
START:
OUTPUT RA.1
MAIN:
SEROUT RA.1,T9600,71
PAUSE 254

GOTO MAIN

 

This produces an initial garbled character on powerup every time:

 

DEVICE          SX28, OSCXT2, TURBO, STACKX, OPTIONX, BOR26
IRC_CAL  IRC_SLOW
FREQ            20_000_000

PROGRAM START
START:
OUTPUT RA.1
MAIN:
PAUSE 254

SEROUT RA.1,T9600,71

GOTO MAIN

 

Is this an SX/B compiler bug? How can I get rid of this garble and still get an initial time delay before sending after a power up??

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