flashid.c

CHP 2 - Real-Time Digital Signal Processing: Implementations and Applications, Second Edition by Sen

// 
//  Project: Experiment 2.10.5 Flash Programming - Chapter 2 
//  File name: flashID.c   
//  Function: flashID()        
//
//  Description: This function reads the C5510 DSK flash memory manufacture ID
//               This funciton is for AMD: AM29LV400B
//
//  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 "flash.h"

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

void flashID(unsigned short *ManuID, unsigned short *DevID)
{           
  volatile unsigned short i;

  *((unsigned short *)FLASH_MEM_BASE) = FLASH_MEM_RESET;
    
  // Issue read product Manufacturer and device ID sequence
  *((volatile unsigned short *)FLASH_MEM_ADDR555) = FLASH_MEM_AA;
  *((volatile unsigned short *)FLASH_MEM_ADDR2AA) = FLASH_MEM_55;
  *((volatile unsigned short *)FLASH_MEM_ADDR555) = FLASH_MEM_ID; 
  for (i=0; i<50; i++) ; // Must be at least more than device write cycles
  // Read manufacture and device ID
  *ManuID = *((unsigned short *)FLASH_MEM_BASE+0x0);  
  *DevID = *((unsigned short *)FLASH_MEM_BASE+0x1);
  flashReset();
}