12F1840 config issues

[Charlie]

I guess SEROUT2 has changed for PBP3, because in PBP 2.6, the number 16468 is definitely wrong.
Anyway, are you seeing any characters correctly? If so, you may need to put a pause between characters. I needed to do this with the 1840 talking to some devices.
The clock may also be slightly off, causing some characters to get messed up.

[HenrikOlsson]

According to the manual 16468 would be 9600, driven, inverted, no parity. Bit 15 is set which means driven, bit 14 says inverted, bit 13 says no parity. The rest of the bits says 84 which according to the formuala (1000000 / baud - 20) should result in 9600 baud.

/Henrik.

[enigma]

Yes 9600 inverted and the same line works correctly on other PIC types I have tried, its only with the 12F1840 it doesnt

[amgen]

if you cant check clock with frequency meter.......... add in loop once per second (on serout) increment or decrement osctune to see if characters come in view then try to figure about how far off and in what direction (raise/lower freq)
amgen

[Archangel]

Try Turning off the fail safe clock monitor, if I understand correctly it monitors an EXTERNAL clock. . .
I would TRY altering bit 1 in OSCON just to see if it has any effect . . .

I would add to config1
_IESO_OFF ; Internal/External Switchover mode is disabled

and I would disable WDT while troubleshooting at least once to judge if it has any effect.

Oh yes, I would make a blinky program to test my configs without any serouts . . . a stopwatch using a blinky will give you a rough idea as to whether or not you are running at expected OSC speed.

[enigma]

Hi All

I LED on the same pin configured to blink once per second, does just that so I am pretty sure some configs are right. I`ll try the last suggestions and see before I put in a support message. Many thanks for all the help! Cheers Pete

[Archangel]

Hi Pete,
Do you think trying to use timer 1 and trying to output serial data on T1 Clkin pin might be in conflict? I don't know, just sayin' . . . Have you tried using another pin, say RA1?