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RS232 communication

 
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Eeprom_programmer



Joined: 07 Aug 2007
Posts: 24

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RS232 communication
PostPosted: Mon Aug 13, 2007 7:37 am     Reply with quote
Hey,

Currently i am using a program on VB to turn on/0ff pins on a microcontroller.

Does anyone have an idee how to write this code in CCS?

Code:


Main:

' Use the programming port to receive
' data at 2400 baud
' Wait for the synch byte (255) and then
' get the PinNumber and PinState
Serin 16,16780,[WAIT(255),PinNumber,PinState]

' If PinState=0 Then go to GoLow
' otherwise go to GoHigh
Branch PinState,[GoLow,GoHigh]
Goto Main


' Set The pin low
GoLow:
LOW PinNumber
Goto Main


' Set the pin high
GoHigh:
HIGH PinNumber
Goto Main

ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Mon Aug 13, 2007 8:09 am     Reply with quote
Code:
#include <18F458.h>
#fuses HS, NOWDT, PUT, NOLVP
#use delay(clock=16000000)
#use rs232 (baud=2400, xmit=PIN_C6, rcv=PIN_C7, ERRORS)


void wait_pin_command()
{
  int8 PinNumber;
  int8 PinState;
 
  while (getc() != 255)
    ; // wait for the synch byte
 
  PinNumber = getc();
  PinState = getc();

  if (PinState == 0)
  {
    output_low(PinNumber);
  }
  else
  {
    output_high(PinNumber);
  }
}

void main()
{
  while (TRUE)
  {
    wait_pin_command();
  }
}
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