here's some asm serial code from another source:
http://www.instructables.c
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PIC16F877A to PC serial using RS232. HELP!!!
Hey,
I have a PIC16F877A which has an 8 bit ADC output. I want to connect it using the Max232 interface to a PC's serial port (COM1) using RS232. I am looking for the asm code on the PIC side as well as the VB or C code (or hyperterminal with steps) on the PC side.
I have spent over 3 sleepless days trying various codes on both sides (asm/c and VB) but am yet to find 'the perfect one'.
Tyvm.
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by: Erick37Posted on 2007-07-10 at 18:35:49ID: 19459272
.Net 2.0 has a new SerialPort class which allows you to connect your hardware via the rs232 port of the PC.
Example code:
http://www.lvr.com/serport
MS documentation:
http://msdn2.microsoft.com
If you are still using thye 1.1 framework, you may give this a shot:
http://www.microsoft.com/d
As far as the PIC code goes, you can find application notes with sample code at the Microchip website.
See AN774
http://www.microchip.com/s
I have done this in the past using the PIC16cXX processors and VB6 -- it was not easy then and I doubt it will be any easier now. Be prepared for a lot of debugging. I used Hyperterminal for testing both hardware and software before hooking both together. That eliminated some of the problems. It's a plus if you can set up 2 computers via a null modem cable to test your VB code on one machine and hyperterminal on another.