disp_task.c

MP3播放器详细设计方案

/*C**************************************************************************
* NAME:         disp_task.c
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      snd1c-refd-nf-3_0_0      
* REVISION:     1.4.2.11     
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the display task and attached routines
*
* NOTES:
* Global Variables:
*   - gl_cpt_tick:  global tick counter in data space
*****************************************************************************/

/*_____ I N C L U D E S ____________________________________________________*/

#include "config.h"                         /* system configuration */
#include FILE_BOARD_H                       /* board definition */
#include "modules\file\file.h"              /* file definition */
#include "modules\display\disp.h"           /* display definition */
#include "disp_task.h"                      /* display task definition */
#include "modules\display\led.h"            /* led definition */


/*_____ M A C R O S ________________________________________________________*/

#define REF_STATE_SONG      0
#define REF_STATE_VOICE     1
#define REF_STATE_USB       2
#define REF_STATE_FORMAT    3


/*_____ D E F I N I T I O N ________________________________________________*/

extern  data    Byte    gl_cpt_tick;        /* general tick counter */

static  bdata   bit     disp_scroll_on;     /* set to TRUE to scroll name */
static  bdata   bit     disp_clock_on;      /* set to TRUE to start clock */
static  data    Byte    disp_sec_cpt;       /* second counter */
static  data    Byte    disp_min_cpt;       /* minute counter */
static  data    char pdata *  disp_buffer;

static  data    Byte    disp_state;         /* task state */

extern xdata Byte  func_state;
extern xdata Byte  func_timeout;  // Time out special function
extern xdata Byte  ref_state;
extern bit         playing;
extern bit         pause;
extern bit         recording;
extern bit         connected;
extern xdata Byte  LED_ON;
extern xdata Byte  LED_FAST;


/*_____ D E C L A R A T I O N ______________________________________________*/


/*F**************************************************************************
* NAME: disp_task_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE: 
*   Display task initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_task_init (void)
{
  disp_scroll_on = FALSE;
  disp_clock_on = FALSE;
  disp_state = DISP_IDLE;
  print_init();
}


/*F**************************************************************************
* NAME: disp_task
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE: 
*   Display task handling display of clock and scrolling of file name
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_task (void)
{
  led_task();
  switch (disp_state)
  {
    case DISP_IDLE:
    {
      break;
    }

    case DISP_INIT:
    {
      disp_state = DISP_TICK0;
      gl_cpt_tick = 0;
      disp_buffer = File_get_name();
      if (print_name(disp_buffer) != TRUE)  /* test if not short name */
      {
        disp_scroll_on = TRUE;              /* activate name scrolling */
      }
      else
      {
        disp_scroll_on = FALSE;             /* no scrolling */
      }
      break;
    }

    case DISP_TICK0:
    {
      if (gl_cpt_tick > DISP_TICK_500)      /* 1/2 sec expiration */
      {
        gl_cpt_tick -= DISP_TICK_500;
        if (disp_scroll_on)
        {
          if (print_name(disp_buffer))
          {
            disp_buffer = File_get_name();
          }
          else
          {
            disp_buffer++;
          }
        }
        disp_state = DISP_TICK1;
      }
      break;
    }

    case DISP_TICK1:
    {
      if (gl_cpt_tick > DISP_TICK_500)      /* 1/2 sec expiration */
      {
        gl_cpt_tick -= DISP_TICK_500;
        if (disp_scroll_on)
        {
          if (print_name(disp_buffer))
          {
            disp_buffer = File_get_name();
          }
          else
          {
            disp_buffer++;
          }
        }
        if (disp_clock_on)
        {
          disp_state = DISP_SEC;
        }
        else
        {
          disp_state = DISP_TICK0;
        }
      }
      break;
    }

    case DISP_SEC:
    {
      if (disp_sec_cpt == DISP_SEC_MIN)     /* 1 min expiration */
      {
        disp_sec_cpt = 0;
        print_sec(disp_sec_cpt);
        disp_state = DISP_MIN;
      }
      else
      {
        disp_sec_cpt++;
        print_sec(disp_sec_cpt);
        disp_state = DISP_TICK0;
      }
      break;
    }

    case DISP_MIN:
    {
      disp_min_cpt++;
      print_min(disp_min_cpt);
      disp_state = DISP_TICK0;
      break;
    }
  }
}


/*F**************************************************************************
* NAME: disp_name_start 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE: 
*   Start name display
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_name_start (void)
{
  disp_state = DISP_INIT;
}


/*F**************************************************************************
* NAME: disp_name_stop 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Suspend name display
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_end_of_play (void)
{
LED_ON = (8>>ref_state);
LED_FAST = 3;
if (recording)
  {
  SHUT_MIC = 1;
  pause=FALSE;
  recording=FALSE;
  }
else if (playing && ref_state==REF_STATE_VOICE)
  {
  func_state=0;
  recording=TRUE;
  LED_FAST=2;
  }
else func_state=0;
playing=FALSE;

  disp_state = DISP_IDLE;
}



/*F**************************************************************************
* NAME: disp_name_stop 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Suspend name display
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_name_stop (void)
{
  disp_state = DISP_IDLE;
}


/*F**************************************************************************
* NAME: disp_clock_reset
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Reset chrono to 0:00
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_clock_reset (void)
{
LED_VOL   = 0;
LED_BASS  = 0;
LED_MED   = 0; 
LED_TREEB = 0;
  disp_clock_on = FALSE;
  disp_sec_cpt = 0;
  disp_min_cpt = 0;
  print_time(0, 0);                         /* display 0:00 */
//  disp_state = DISP_INIT;                   /* reset task */
}



/*F**************************************************************************
* NAME: disp_clock_start 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Start or re-start clock display
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_clock_start (void)
{
  disp_clock_on = TRUE;
}


/*F**************************************************************************
* NAME: disp_clock_stop 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Suspend clock display
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void disp_clock_stop (void)
{
  disp_clock_on = FALSE;
}


/*F**************************************************************************
* NAME: disp_get_min 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*   minutes
*----------------------------------------------------------------------------
* PURPOSE: 
*   Return minutes of current time
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
Byte disp_get_min (void)
{
  return disp_min_cpt;
}


/*F**************************************************************************
* NAME: disp_get_sec 
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*   seconds
*----------------------------------------------------------------------------
* PURPOSE: 
*   Return seconds of current time
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
Byte disp_get_sec (void)
{
  return disp_sec_cpt;
}