dac_drv.lst

本人at89c51snd1c主控IC增加了128*32点阵驱动显示

C51 COMPILER V7.20   DAC_DRV                                                               03/24/2007 10:02:36 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE DAC_DRV
OBJECT MODULE PLACED IN .\Output\dac_drv.obj
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE lib_refd\dac\dac_drv.c OPTIMIZE(7,SPEED) BROWSE INCDIR(.\modules\system;.\;
                    -.\;.\lib_refd) DEFINE(KEIL) DEBUG OBJECTEXTEND PRINT(.\Output\dac_drv.lst) OBJECT(.\Output\dac_drv.obj)

line level    source

   1          /*C**************************************************************************
   2          * NAME:         dac_drv.c
   3          *----------------------------------------------------------------------------
   4          * Copyright (c) 2003 Atmel.
   5          *----------------------------------------------------------------------------
   6          * RELEASE:      snd1c-refd-nf-4_0_3      
   7          * REVISION:     1.5     
   8          *----------------------------------------------------------------------------
   9          * PURPOSE:
  10          * This file contains routines to address UDA1330ATS in L3 mode
  11          *
  12          *****************************************************************************/
  13          
  14          /*_____ I N C L U D E S ____________________________________________________*/
  15          
  16          #include "config.h"                         /* lib configuration header */
  17          #include "board.h"                          /* board definition */
  18          #include "dac_drv.h"                        /* dac driver definition */
  19          
  20          /*_____ M A C R O S ________________________________________________________*/
  21          
  22          
  23          /*_____ D E F I N I T I O N ________________________________________________*/
  24          
  25          /*_____ D E C L A R A T I O N ______________________________________________*/
  26          
  27          #ifdef DAC_L3MODE
              /*F**************************************************************************
              * NAME: dac_byte_send
              *----------------------------------------------------------------------------
              * PARAMS:
              *   b:   byte to send
              * return:
              *----------------------------------------------------------------------------
              * PURPOSE: 
              *   Serialize a data/cmd/addr byte on DAC_L3DATA & DAC_L3CLOCK pins.
              *----------------------------------------------------------------------------
              * NOTE:
              *   This function should only be used by dac_l3mode_send
              *----------------------------------------------------------------------------
              * REQUIREMENTS:
              *****************************************************************************/
              void dac_byte_send (Byte b)
              {
              Byte    c;
              
              for (c=8;c;c--)
                {
                DAC_L3DATA=(b&1); // practically 50% duty cycle
                DAC_L3CLOCK=0;
                b>>=1;
                DAC_L3CLOCK=1;    // data bit is sampled here (rising edge)
                }
              }
C51 COMPILER V7.20   DAC_DRV                                                               03/24/2007 10:02:36 PAGE 2   

              
              
              /*F**************************************************************************
              * NAME: dac_l3mode_send
              *----------------------------------------------------------------------------
              * PARAMS:
              *   addr:   logical address of the chip (000101xxb for UDA1330)
              *   b:      data/cmd byte to send
              * return:
              *----------------------------------------------------------------------------
              * PURPOSE: 
              *   Send a L3-mode command to the DAC UDA1330
              *----------------------------------------------------------------------------
              * NOTE:
              *   This function improve the song quality (low level, decrease signal/noise).
              *----------------------------------------------------------------------------
              * REQUIREMENTS:
              *   Only tested with UDA1330ATS
              *****************************************************************************/
              void dac_l3mode_send (Byte addr,Byte b)
              {
              /*      
              DAC_TEST=0;     // be carefull ! if DAC_TEST is set with DAC_APPSEL not set, I/O of UDA1330 change a lot
              DAC_APPSEL=0;   // Turn DAC in L3 mode
              DAC_L3MODE=1;   
              DAC_L3CLOCK=1;
              DAC_L3DATA=1;   // Normal state, basically, those three pins are already set
              // Begin Addr transfer
              DAC_L3MODE=0;
              */
              dac_byte_send(addr);
              // Begin Data/Cmd transfer
              //DAC_L3MODE=1;
              dac_byte_send(b);
              // Ack end of data/cmd transfer
              //DAC_L3MODE=0;
              //DAC_L3MODE=1;
              }
              
              /*F**************************************************************************
              * NAME: dac_set_vol
              *----------------------------------------------------------------------------
              * PARAMS:
              *
              * return:
              *----------------------------------------------------------------------------
              * PURPOSE: 
              *   Use the DAC to modify song level.
              *----------------------------------------------------------------------------
              * NOTE:
              *   This function must be call each time mp3_volume is changed
              *----------------------------------------------------------------------------
              * REQUIREMENTS:
              *****************************************************************************/
              void dac_set_vol (Byte volume)
              {
              if (volume>=32) volume=16; // security !
              if (volume<24)
                {
                MP3VOL = MP3VOR = 15;
                dac_l3mode_send(DAC_L3I_ADDR,64-(volume<<1)-volume+(volume>>2));
                }
C51 COMPILER V7.20   DAC_DRV                                                               03/24/2007 10:02:36 PAGE 3   

              else
                {
                MP3VOL = MP3VOR = 15 + ((volume-23)<<1);
                dac_l3mode_send(DAC_L3I_ADDR,0);
                }
              }
              
              #endif
 125          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =   ----    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)