mcbspreset.c

来自「CHP 2 - Real-Time Digital Signal Process」· C语言 代码 · 共 39 行

// 
//  Project: Experiment 2.10.6 Configure and Use McBSP- Chapter 2 
//  File name: mcbspReset.c   
//  Function(s): mcbspReset()        
//
//  Description: This function resets the C5510 DSK McBSP registers
//
//  For the book "Real Time Digital Signal Processing: 
//                Implementation and Application, 2nd Ed"
//                By Sen M. Kuo, Bob H. Lee, and Wenshun Tian
//                Publisher: John Wiley and Sons, Ltd
//
//  Tools used: CCS v.2.12.07
//              TMS320VC5510 DSK Rev-C
//

#include "mcbsp.h"

#pragma CODE_SECTION(mcbspReset, ".text:example:mcbspReset");

void mcbspReset(short mcbspx)
{
  volatile short i;
  ioport volatile unsigned short*p;      
    
  p = (ioport volatile unsigned short*)(McBSP_BASE+(mcbspx<<10));           
    
  for (i=0; i<31; i++)       // Zero out all registers and set the bits below
  {
    *p++ = 0;
  }  
    
  p = (ioport volatile unsigned short*)(McBSP_BASE+(mcbspx<<10)+SRGR2);            
  *p++ = 0x2000;             // SRGR2 default to 0x2000
  *p   = 0x0001;             // SRGR1 default to 0x0001                           
}