This may be a baudrate problem, baudrate accidentally coming within spec while the power is on the downslope.
Hyperterminal will usually filter out anything that isn't readable.
Try RS232 Hex Com Tool instead its much better, it'll show you ASCII or HEX, and if you're getting
garbage it'll show you that too.
< http://www.rs232pro
kg4pid wrote:
--I'm using a serial routine on a 12F675 and started by sending out the
word "HELLO" over and over. Funny thing is while it's powered on I get
nothing out, but the instant I remove power it sends out 10 or 11
characters. The filter cap is powering it for that fraction of a
second. The circuit is being powered by a 9V battery with a 78L05 to
regulate it at 5V. My meter reads 4.99v at the pic chip. A logic probe
connected to the output blinks the whole time it is powered up which
should mean that its sending something. I had to include this bit of
code at the very beginning before I got anything at all.
call 0x3FF ; Retrieve Factory Calibration
BANKSEL OSCCAL ; BANK1
movwf OSCCALAnyone have any ideas as to what might cause a problem like this?
Thanks, Max
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Eirik Karlsen
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