firmware.dartboard/status.c (e8658d5) - flaneth · BlinkenArea

status.c

/* flaneth - flash and ethernet - dartboard mod
 * version 0.1 date 2008-11-09
 * Copyright (C) 2007-2008 Stefan Schuermans <stefan@schuermans.info>
 * Copyleft: GNU public license V2 - http://www.gnu.org/copyleft/gpl.html
 * a BlinkenArea project - http://www.blinkenarea.org/
 */

#include <avr/io.h>

#include "macros.h"
#include "status.h"

// IO pins of bus
#define STATUS_DDR (DDRE)
#define STATUS_PORT (PORTE)
#define STATUS_BIT (2)

// status information
char StatusInfoCfPresent = 0; // presence of working compact flash card (boolean) (extern)

// number of times to blink status LED
#define StatusBlinkCntIdle (1)
#define StatusBlinkCntIdleWithCf (2)
#define StatusBlinkCntWorking (3)
#define StatusBlinkCntMax (3) 
unsigned char StatusBlinkCnt = StatusBlinkCntIdle;

// interval counter for blinking status LED
unsigned char StatusBlinkInterval = 0;

// initialize
void StatusInit( void )
{
  //set up IO pin of status LED as output
  bit_clear( STATUS_PORT, STATUS_BIT );
  bit_set( STATUS_DDR, STATUS_BIT );
}

// tick procedure - call every 200ms
void StatusTick200( void )
{
  // turn on status LED only in even intervals and if not yet blinked StatusBlinkCnt times
  if( (StatusBlinkInterval & 0x01) == 0 && StatusBlinkInterval >> 1 < StatusBlinkCnt )
    bit_set( STATUS_PORT, STATUS_BIT );
  else
    bit_clear( STATUS_PORT, STATUS_BIT );

// next interval
  StatusBlinkInterval++;

// blink cycle finished
  if( StatusBlinkInterval >> 1 > StatusBlinkCntMax ) {
    StatusBlinkInterval = 0;

// set new blink count depending on status information
    if( StatusInfoCfPresent )
      StatusBlinkCnt = StatusBlinkCntIdleWithCf;
    else
      StatusBlinkCnt = StatusBlinkCntIdle;
  }
}

flaneth

initial commit after making CF identify work