main.c

NoteBook Docking Power and Audio Switch Control using Atmel AT89S51 Chip Program by C language Com

/***************           XXXXXX CONFIDENTIAL         ****************/
/***************                                       ****************/
/*************** Description : MAIN control procs used ****************/
/***************               for Docking devices     ****************/
/***************                                       ****************/
/***************     Company : XXXXXXTek Inc.          ****************/
/***************  Programmer : Steven Chu              ****************/
/***************        Date : 03/26/2007              ****************/
/**********************************************************************/

#define _C_MAIN_

#include "general.h"

#pragma  NOAREGS
 
/************************************************************************
     Function : void main(void)
  Description : MAIN ROUTINE
    Parameter : None
    Return    : None
************************************************************************/
void main(void)
{
#ifdef _RS232_DEBUG_
  BYTE bTmpCnt = 50; // 1 sec time out 
#endif

  PWROnInital();  // Power on initial Hardware

#ifdef _RS232_DEBUG_
  RS232Data1(0xAA, 0xAA, 0xAA);
#endif
  
  /*====================================================================*/
  /*========================= MAIN LOOP ================================*/
  /*====================================================================*/
  while(TRUE)
  {
    /**** Increase Pause Timer Count Every 20ms ****/
    if (_testbit_(_fgTimeout)) // 500us time up
    {
      if (_b20msTimeUp)
      {
        _b20msTimeUp--;
      }
      if ((_bSystemMode != POWER_OFF_NORMAL) &&
          (_bSystemMode != POWER_OFF_IDLE) &&
          (_bSystemMode != POWER_OFF_SLEEP))
      {
        ProcLEDBlink1();

        if (_bSystemCount)
        {
          ProcLEDBlink2();      // Process All LED Blinking
        }
      }
    }

    if (!_b20msTimeUp)
    {
      _b20msTimeUp = 40;

  #ifdef _RS232_DEBUG_
      if (bTmpCnt)    
      {
        bTmpCnt--;     // Temp Timer Count for Debug
      }
      else             // 1 sec time out
      {
        bTmpCnt = 50;
        RS232Data1('2','3','2');
      }
  #endif
      if (_bSystemCount)    
      {
        _bSystemCount--;     // System Timer Count
      }

      ReadSwStatus();        // Read All key status

      CheckExpressCard();    // Check ExpressCard Connect status

      //CheckPEXReset();       // Check PEX_RST pin status

      ChkPowerSwitch();      // check Power key status
 
      ChkVolumeUpSwitch();   // Check Volume Up key status
      
      ChkVolumeDownSwitch(); // Check Volume Down key status
     
      ChkMuteSwitch();       // Check Mute key status
    
      _bOldAllKeyStatus = _bAllKeyStatus; // Save current status to old_status for next 20ms cycle to compare the different status

      // Flash Power LED if prepare Power Off
      if (_fgPWRLEDFlash)                         // Power LED flash enable?
      {
        if (--_bFlashCount == 0)                  // flash hold time up change LED on/off status                                       
        {
          P2 ^= 0x01;                            // toggle Power LED
          _bFlashCount = _bPWRLEDBlinkTime;      // Reset flash hold count                                          
        }
      }

      // Check System Mode
      switch (_bSystemMode)
      {
        case POWER_OFF_NORMAL:
             if (_testbit_(_fgPWRKeyPressed))   // Power key pressed 
             {
               PWRLEDOn();                      // Set Power LED on
               _bSystemCount = 50;              // Power on hold 1 sec 
               _bSystemMode = POWER_ON_CHECK_HOST;    // Change Mode 
             }
             else if (!_bSystemCount)           // idle time out
             {
               _bSystemCount = 250;             // idle mode over 5 sec entering sleep mode
               _bSystemMode = POWER_OFF_IDLE;   // Change to idle mode
               PCON |=0x01;                     // Entering Idle Mode Wake up by Power key press
             }
             break;
      
        case POWER_OFF_IDLE:
             if (_testbit_(_fgPWRKeyPressed))   // Power key pressed 
             {
               SetPowerOff();                   // Power       function control OFF  
               SetMuteOff();                    // Mute        function control OFF  
               ClrVolUp();                      // Volume Up   function control OFF  
               ClrVolDn();                      // Volume Down function control OFF  
               PWRLEDOn();                      // Set Power       LED on
               MuteLEDOff();                    // Set Mute        LED off
               VolUpLEDOff();                   // Set Volume Up   LED off
               VolDnLEDOff();                   // Set Volume Down LED off
               ExpCardLEDOff();                 // ExpressCard LED Off
               SetPort1High();                  // Set Switch Port(P1) High
               ResetVar();                      // Set default value
               _bOldAllKeyStatus = 0xEF;        // Initial All Key status
               _bAllKeyStatus = 0xEF;           // Initial All Key status
               _bSystemCount = 50;              // Power on hold 1 sec 
               _bSystemMode = POWER_ON_CHECK_HOST;    // Change Mode 
             }
             else if (!_bSystemCount)           // idle time over 5 sec entering sleep mode
             {
               _fgExt0Int = 0;                  // Clear External Interrupt 0 flag
               _bSystemMode = POWER_OFF_SLEEP;
               PCON |=0x02; // Entering Power Down Mode Wake up by Power key press
             }
             break;
      
        case POWER_OFF_SLEEP:
             if (_testbit_(_fgExt0Int))         // Power key pressed and external 0 interrupt 
             {
               SetPowerOff();                   // Power       function control OFF  
               SetMuteOff();                    // Mute        function control OFF  
               ClrVolUp();                      // Volume Up   function control OFF  
               ClrVolDn();                      // Volume Down function control OFF  
               PWRLEDOn();                      // Set Power       LED on
               MuteLEDOff();                    // Set Mute        LED off
               VolUpLEDOff();                   // Set Volume Up   LED off
               VolDnLEDOff();                   // Set Volume Down LED off
               ExpCardLEDOff();                 // ExpressCard LED Off
               SetPort1High();                  // Set Switch Port(P1) High
               ResetVar();                      // Set default value
               _bOldAllKeyStatus = 0xEF;        // Initial All Key status
               _bAllKeyStatus = 0xEF;           // Initial All Key status
               _bSystemCount = 50;              // Power on hold 1 sec 
               _bSystemMode = POWER_ON_CHECK_HOST;    // Change Mode 
             }
             break;

        case POWER_ON_HOLD:
             if (!_bSystemCount)
             {
               _fgMuteLEDFlash = 1;            // Mute LED Flash flag        
               _fgVolUpLEDFlash = 1;           // Volume Up LED Flash flag   
               _fgVolDnLEDFlash = 1;           // Volume Down LED Flash flag 
               _fgExpCardLEDFlash = 1;         // ExpressCard LED On
               _bSystemCount = 250;            // All LED on hold 5 sec 
               _bSystemMode = POWER_ON_CONNECTED;
             }
             break;

        case POWER_ON_CHECK_HOST: // Power on check ExpressCard plug or not
             if (_bExpCardStatus == SW_HOLD)    // ExpressCard hold
             {
               SetPowerOn();                    // Set Power On 
               _bSystemCount = 75;              // Power on hold 1.5 sec 
               _bSystemMode = POWER_ON_HOLD;
             }
      
             if (_testbit_(_fgPWRKeyPressed))   // Power key pressed 
             {
               _bSystemCount = 100;             // Power key hold must over 2 sec 
               PWRLEDOn();  // Power LED off
               _bSystemMode = POWER_ON_PWRSW_HOLD;
             }
             break;
       
        case POWER_ON_CONNECTED:
             if (_bExpCardStatus == SW_NORMAL)     // ExpressCard break
             {
               _fgExpCardLEDFlash = 0;             // ExpressCard LED Off
               SetPowerOff();                      // Set Power control off
               _bSystemMode = POWER_ON_CHECK_HOST; // Change Mode
             }
             //if (_bPEXResetStatus == SW_HOLD) // Host PEX_RST pin low -> Reset
             //{
             //  SetPowerOff();         // Set Power control off
             //  _bSystemMode = POWER_ON_CHECK_HOST;
             //}
             if (_testbit_(_fgPWRKeyPressed))   // Power key pressed 
             {