Communications Example : PC to PIC bi-directional dialogue

[Melanie]

Yes you can read in a string of characters the way you specify... but the problem is you are locked in the HSERIN or SERIN command until the number of characters that you specify in your string have arrived. If it's a keyboard input from a host for example, and they go off for a Coffee and a natter in the little-boys room half-way thru the string, then so does your PIC. The best way is to poll the Received Flag in the USART by background interrupt and continually feed a ring buffer. But that's a subject for another time.

No problem with comparing against what's in program-codespace rather than in EEPROM. My example was written that way so people can understand and play with it more easily.

[Jerson]

Melanie

Thanks very much. Your feedback has been helpful. Input will be through another PIC and so the human speed does not matter.

Jerson

[InitialDriveGTR]

Hi, I compile and get some errors. Sorry, but I had to attach it in a picture format.

Thanks.

[Melanie]

Works for me...

H:\Data-Reference\PIC\PBP246>pbp -p16f628 comms1 -v
PicBasic Pro Compiler 2.46, (c) 1998, 2005 microEngineering Labs, Inc.
All Rights Reserved.
Pass 1:
Pass 2:
Code Gen:
Macro Pass:
PM.EXE H:\DATA-R~1\PIC\PBP246\comms1.ASM
PM Assembler 4.07, Copyright (c) 1995, 2004 microEngineering Labs, Inc.
921 words used.

You didn't explain how you've compiled it, but if you follow the example in the PBP manual you will have no problems.

[mister_e]

If you're not using a MELABS compiler you'll have this error message, this error messge also apply on the low cost PBC compiler. It may also happen on PBP using MPASM as assembler.

i suspect the MPASM as assembler, just rem the config fuses (somewhere at the top of the code, and use the correct syntax for MPASM. See FAQ to know how to.