Master Slave Verbindung mit AVR2313 und 485-Bustreibern ?

[Vitis]

Bascom Hilfe:

CONFIG PRINT
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Action

Configure the UART to be used for RS-485


Syntax

CONFIG PRINT0 = pin

CONFIG PRINT1 = pin

Remarks

pin
The name of the PORT pin that is used to control the direction of an RS-485 driver.

mode
SET or RESET

Use PRINT or PRINT0 for the first serial port. Use PRINT1 for the second serial port.

When you use RS-485 half duplex communication you need a pin for the direction of the data. The CONFIG PRINT automates the manual setting/resetting. It will either SET or RESET the logic level of the specified pin before data is printed with the Bascom print routines. After the data is sent, it will inverse the pin so it goes into receive mode.

You need to set the direction of the used pin to output mode yourself.


See also

CONFIG PRINTBIN

 

Example

'------------------------------------------------------------------------------

'name                     : rs485.bas

'copyright                : (c) 1995-2006, MCS Electronics

'purpose                  : demonstrates

'micro                    : Mega48

'suited for demo          : yes

'commercial addon needed  : no

'------------------------------------------------------------------------------

$regfile = "m48def.dat"                                     ' we use the M48

$crystal = 8000000

$baud = 19200

 

$hwstack = 32

$swstack = 32

$framesize = 32

 

Config Print0 = Portb.0 , Mode = Set

Config Pinb.0 = Output                                      'set the direction yourself

 

Dim Resp As String * 10

Do

  Print "test message"

  Input Resp                                               ' get response

Loop

in den Plänen hab ich auch mal rumgepinselt ... siehe Anhang