Strange SerOut Problem

[masosi]

My computer won't talk to a serial modem anymore... and it won't echo its own data from Tx to Rx either...
That explains it!

Then a new question pops up... How was the serial JDM2 programmer verifying the PIC's contents? (I know the PIC was being programmed successfully too!)

Anyway, I'll get my hands on a new set of serial ports tomorrow

Skimask and Paul, thankyou so much for your help so far! I've learnt alot even though the ideas havn't solved my problem! Thanks again!

[mackrackit]

In post 5 I asked about the PC port, and you said that the same thing happened on another computer. ?????

As far as the programmer software reading back correctly, all I can say is it happens. I have a PICKIT1 that will read back errors if I use the software that microchip supplied, but mplab does not. Both software work. I would guess in this case the "lesser" software does not have something correct in its receiving side, like a checksum miss calc.

Again, check the signal with a meter. TX will show low (Maybe even a negative value) when idle and will spike anywhere from 2.5 to 25 V+ at transmit. If you have a machine less than 10 years old or using a usb/serial adpt, you will most likely see 2.5 to maybe 6.

[masosi]

In post 5 I asked about the PC port, and you said that the same thing happened on another computer. ?????

I know! I checked it and it was fine, and the other computer behaved the same... I must have stuffed that up! (Not sure how though!)

[masosi]

The new serial ports let everything behave as it should!
I wish I knew the port was dead 2 weeks ago!!!

Thanks again everyone, very good help

Regards,
Tom.