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Sonsivri > Electronics > Pic Basic Languages (Moderator: bbarney) > flow control in pbp or proton
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falcon _bd
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« on: March 13, 2009, 10:25:16 10:25 »
How to implement software (XON/XOFF)  flow control in pic basic pro or proton for serin, serout .

I am trying to connect pic16f877A and  SIM300CZ module.   




Thanks in advance
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Opast
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« Reply #1 on: March 13, 2009, 01:58:41 13:58 »
Xon, Xoff (software flow control) mode or DTR/DSR mode (hardware flow control). 
In proton using Hardware USART command:
hserout [20] ‘XOFF…STOP TALKING
hserout [17] 'Xon

Using software command in Proton
Rsout 20 'Xoff
Rsout 17 'Xon

I got the numbers from http://www.asciitable.com/

It should be enough info for you to get started.
« Last Edit: March 13, 2009, 02:02:00 14:02 by Opast » Logged
falcon _bd
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« Reply #2 on: March 13, 2009, 03:46:03 15:46 »
But I use serin, serout command.

Is it necessary more then 3 wire for serial communication with software flow control

Please tell me in details 
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Opast
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« Reply #3 on: March 13, 2009, 04:02:13 16:02 »
I never used flow control but it does require 3 wires in / out and flow control wire.  For more info on Serout just open Proton manual page 360.  Flow control uses Fpin.

SerOut PORTA.0/PORTA.1, 84, [17]
porta.0 is serout pin
porta.1 is flow control pin
84 is 9600 baud / 8 bit true
17 is Xon
« Last Edit: March 13, 2009, 04:15:10 16:15 by Opast » Logged
falcon _bd
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« Reply #4 on: March 14, 2009, 11:11:23 11:11 »
The Fpin connect with which pin in serial port  (RTS or CTS).

show me the schematic of connections.
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