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ad50.c
Package: DSP-C6000-DM642DEMO.rar　[view]
Upload User: dahaojd
Upload Date: 2008-01-29
Package Size: 14357k
Code Size: 2k
Category:

DSP program

Development Platform:

C/C++

ad50.c：Code Content
  1. /*
  2.  *  Copyright 2003 by Texas Instruments Incorporated.
  3.  *  All rights reserved. Property of Texas Instruments Incorporated.
  4.  *  Restricted rights to use, duplicate or disclose this code are
  5.  *  granted through contract.
  6.  *  
  7.  */
  8. /* "@(#) DDK 1.10.00.23 07-02-03 (ddk-b12)" */
  9. /* 
  10.  *  ======== ad50.c ========
  11.  */
  13. #include <std.h>
  15. #include <csl.h>
  16. #include <csl_mcbsp.h>
  18. #include <ad50.h>
  20. static Void spWrite(MCBSP_Handle hMcbsp, Uns dataVal);
  21. static Void codecControlWrite(MCBSP_Handle hMcbsp, Uns regVal, Uns dataVal);
  23. /*
  24.  *  ======== AD50_init ========
  25.  */
  26. #pragma CODE_SECTION(AD50_init, ".text:init")
  27. Void AD50_init( Void )
  28. {
  29. }
  31. /*
  32.  *  ======== AD50_setParams ========
  33.  */
  34. Void AD50_setParams(MCBSP_Handle hMcbsp, AD50_Params *params)
  35. {
  36.     codecControlWrite(hMcbsp, 1, params->control1);
  37.     codecControlWrite(hMcbsp, 2, params->control2);
  38.     codecControlWrite(hMcbsp, 3, params->control3);
  39.     codecControlWrite(hMcbsp, 4, params->control4);
  40. }
  42. /*
  43.  *  ======== codecControlWrite ========
  44.  *  The 16-bit word in each control register is composed of:
  45.  *  b15-b8 -> register address to talk to 1 of 5 control registers
  46.  *  b7-b0  -> data.
  47.  */
  48. static Void codecControlWrite(MCBSP_Handle hMcbsp, Uns regVal, Uns dataVal)
  49. {
  50.     Uns temp;
  51.  
  52.     temp = (regVal << 8) | (dataVal & 0x00ff);
  54.     /* write '1' to put codec into command mode */
  55.     spWrite(hMcbsp, 1);
  57.     /* write the command */
  58.     spWrite(hMcbsp, temp);
  59. }
  61. /*
  62.  *  ======== spWrite ========
  63.  *  WARNING!  Unbounded while loop!
  64.  *  spWrite() should only be called during init time.
  65.  */
  66. static Void spWrite(MCBSP_Handle hMcbsp, Uns dataVal)
  67. {
  68.     while(!MCBSP_xrdy(hMcbsp)) {
  69.         /* wait for TX ready */
  70.     }
  72.     MCBSP_write(hMcbsp, dataVal);
  73. }