/////////////////////////////////////////////////////////////////////////////////////////////
//
//                            NXT Battery Level Access
//
// Test program to:
//   1. Read the NXT battery levels and display on LCD.
//   2. Ue the battery level in a user program to make a decision on program flow.
//
// Two RobotC intrinisc variables are available:
//        nAvgBatteryLevel
//        nImmediateBatteryLevel
//
// Some sensors and other devices require
//
/////////////////////////////////////////////////////////////////////////////////////////////



const int kMinimumBatteryLvel = 6300;

task main()
{
  int nCounter = 0;

  while (true)
  {
      if (nImmediateBatteryLevel < kMinimumBatteryLvel)
      {
         //
         // Battery level too low to proceeed.
         //
         PlaySound(soundLowBuzz);
         break;
      }
      nxtDisplayTextLine(0, "Battery Levels");

      //
      // Display the Battery levels
      //
      nxtDisplayTextLine(2, "Avg %3.1fV;Now %3.1f", nAvgBatteryLevel / (float) 1000, nImmediateBatteryLevel / (float) 1000);

     //
     // Display the voltage level at which the NXT will "shutdown"
     //
     nxtDisplayTextLine(4, "Shutdown at%4.1fV", nShutdownVoltage / (float) 1000);

     //
     // DIsplay the voltage level at which the NXT will "shutdown"
     //
     nxtDisplayTextLine(5, "Sleep Tmr: %d min", nPowerDownDelayMinutes);

     //
      // Display the Battery type: rechargeable or one-time only
      //
      if (bNxtRechargable)
         nxtDisplayTextLine(7, "Rechargable");
      else
        nxtDisplayTextLine(7, "Non-Rechargable");

     //
     // You can also immediately power off the NXT as follows:
     //
     wait1Msec(10);
     ++nCounter;
     if (nCounter > 15000)
       powerOff();
  }
  return;
}