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The communication cable to the PC is made as specified in the PicBasic Compiler Manual.
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1.0K |
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DB9 |
| pin |
--/\/\/\---- |
RS-232 RX |
Pin 2 |
| GND |
------------ |
RS-232 GND |
Pin 5 |
In this diagram, a 1K resistor is placed in line with the chosen output pin
and pin2 of a DB9 connector. Ground is connected from pin 5 of the DB9 to any
of the ground pins on the PicPac.
In the example below, I chose PortB pin0 for the serial out.
The baud rates are 300, 1200, 2400, and 9600. The N in "N2400" specifies
that the signal is TTL inverted. Other choices are: T for TTL true, OT for Open Drain
and ON for Open Source.
So, in the case below:
SerOut 0, N2400, ("Hello",10,13)
Means: send "Hello" with a line feed(10) and return(13) at 2400 baud with an
inverted TTL signal out pin 0 on Port B.
I used Hyperterminal in windows to receive the the signal.
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'******** Dispay Data on the PC ****************
'@ Platform: PicBasic
'@ Version: 1.0
'@ Author: Brian Patton (brianp@robodyssey.com)
' Robodyssey Systems, LLC. - www.robodyssey.com
'@ Last Updated: Feb 18, 2004
'***********************************************
' This Program uses the 16F876. Displays on your computer
'"Hello" and flashes an LED on and Off. The RS232 is connected
'to pin 0 on Port B. The LED to pin 3, Port B via a 10k
'resistor
'*****Initiation********************************
Init:
Dirs = %11111111 ' Set all Port B to output
'*****Main Code Block Area**********************
start:
High 3
SerOut 0, N2400, ("Hello",10,13)
Pause 100
Low 3
Pause 100
GoTo start 'Start it all over again
End
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