leds_ctrl.c

NXP LPC系列AMR7的开发程序源码（LCD

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2007
 *
 *    File name   : leds_ctrl.c
 *    Description : LEDs control functions
 *
 *    History :
 *    1. Date        : January 18, 2007
 *       Author      : Stanimir Bonev
 *       Description : Create
 *
 *
 *    $Revision: 1.0 $
 **************************************************************************/
#define __LEDS_CTRL_GLOBALS

#include "leds_ctrl.h"

static pLedsCtrl_t pLEDsCtrl = NULL;

/*************************************************************************
 * Function Name: LEDsScan
 * Parameters: none
 * Return: none
 *
 * Description: Scan all on LEDs
 *
 *************************************************************************/
void LEDsScan (void)
{
static unsigned int Mask;
  OS_RetriggerTimer(&ScanLEDsTimer);
  if(pLEDsCtrl == NULL)
  {
    // turn all LEDs off
    BSP_ClrLED(~(0));
    return;
  }
  if(pLEDsCtrl->LedsOnMask)
  {
    // Find next ON LED
    for(int i = 0; i < _LEDS_NUMB; ++i)
    {
      Mask <<= 1;
      if(!Mask)
      {
        Mask = 1;
      }
      if(pLEDsCtrl->LedsOnMask & Mask)
      {
        BSP_ClrLED(~(pLEDsCtrl->LedsOnMask & Mask));
        BSP_SetLED(  pLEDsCtrl->LedsOnMask & Mask);
        break;
      }
    }
  }
  else
  {
    // All LEDs are off
    BSP_ClrLED(~pLEDsCtrl->LedsOnMask);
  }
}

/*************************************************************************
 * Function Name: LEDsUpdatePattern
 * Parameters: none
 * Return: none
 *
 * Description: Update LEDs pattern
 *
 *************************************************************************/
void LEDsUpdatePattern (void)
{
  OS_RetriggerTimer(&UpdateLEDsPatternTimer);
  if(pNewLEDsCtrl != NULL)
  {
    // Get new LEDS pattern massive
    pLEDsCtrl = pNewLEDsCtrl;
    pNewLEDsCtrl = NULL;
  }
  else if(pLEDsCtrl != NULL)
  {
    // Update LEDs patten
    if(pLEDsCtrl->pNext != NULL)
    {
      pLEDsCtrl= pLEDsCtrl->pNext;
    }
  }
}