Configuration of Spartan-3E Using Boundary Scan

humuji · January 21, 2018

Hi

I am trying to program spartan-3e(NEXYS2) using boundary scan based on Digilent Adept JTAG Interface
(DJTG) Programmer’s Reference Manual. And i find a demo(xilinx_jtag_prigramming_linux.c)[1] about how to program

spartan-2 in JTAG mode through a parallel port. I have rewritten a procedure refer to the demo[1] basing on Digilent Adept

JTAG Interface (DJTG) Programmer’s Reference Manual and Spartan-3 Generation Configuration User Guide. But it dose't work.

My question is whether there are some differences between spartan-3e and spartan-2 in JTAG programming? i can not

find the document about configuration and readback of Spartan-3 and Spartan-3e in xilinx website. And how Adept programs

spartan-3e in JTAG mode through USB cable?

Any help will be appreciated, thank you!

jpeyron · January 22, 2018

Hi @humuji,

I reached out to our design engineer. They responded after looking at jtscdvclist.txt that they can tell that the Spartan 3E is a different programming algorithm than Spartan 2. They don’t know what the difference between the two programming algorithms are. Did you try using djtgcfg to program the Spartan 3E on your board to see if Adept even has the correct algorithm?

thank you,

Jon

humuji · January 23, 2018

Hi @jpeyron

As it is showed in the figure 1, i have tried to program Spartan-3e through Adept and it works well.

image.png.68333f050ccb59c61ea585ae60e19ba4.png

figure 1

I also rewrite a procedure referring to Spartan-6 FPGA Configuration user guide. This proceduer can download some

bit files correctly, but failed for other bit files. I haven't found the reason yet.The jtag configuration steps i found in Spartan-6 FPGA Configuration user guide

are showed in figure 2.

image.png.8d43598bfc690b9a1cfd6fae9dc52af4.png

figure 2

And the following is my procedure. Can you tell me in which step i made a mistake.Thank you!

humuji

Spoiler

#define _CRT_SECURE_NO_WARNINGS

/* ------------------------------------------------------------ */
/* Include File Definitions */
/* ------------------------------------------------------------ */

#if defined(WIN32)

   /* Include Windows specific headers here.
   */
   #include <windows.h>

#else

   /* Include Unix specific headers here.
   */

#endif

#include <stdio.h>
#include <stdlib.h>

#include "dpcdecl.h"
#include "djtg.h"
#include "dmgr.h"

/* ------------------------------------------------------------ */
/* Local Type and Constant Definitions */
/* ------------------------------------------------------------ */

/* ------------------------------------------------------------ */
/* Global Variables */
/* ------------------------------------------------------------ */
HIF hif;

/* ------------------------------------------------------------ */
/* Local Variables */
/* ------------------------------------------------------------ */

/* ------------------------------------------------------------ */
/* Forward Declarations */
/* ------------------------------------------------------------ */
void decode_id(int id);
void ShowUsage(char* szProgName);
void ErrorExit();

#define file_name "D:\\VS_workspace\\work1\\DJAG_download_bit\\DJAG_read_idcode\\led_test.bit"
#define number_per_trans 10240
/* ------------------------------------------------------------ */
/*               Procedure Definitions                           */
/* ------------------------------------------------------------ */
/***   main
**
**   Parameters:
**       cszArg       - number of command line arguments
**       rgszArg       - array of command line argument strings
**
**   Return Value:
**
**   Errors:
**
**   Description:
**       Run the program.
*/

int main(int cszArg, char* rgszArg[]) {

   char *rbname = file_name;       /*rbt file name*/
   FILE *f;           /*rbt file ptr*/
   char c, next;       /*char from f*/
   unsigned char uc;
   BYTE in_data[number_per_trans];
   BYTE last_byte;
   BYTE last_input[2];
   BYTE buffer;

   long bitcount;
   int n, x, len, len2, token;
   int devid;
   int i;

   /* Command checking */
   if( cszArg < 3 ) {
       ShowUsage(rgszArg[0]);
       ErrorExit();
   }
   if( strcmp(rgszArg[1], "-d") != 0 ) {
       ShowUsage(rgszArg[0]);
       ErrorExit();
   }
   //========================================
   //=========get input file
   if ((f = fopen(rbname, "r")) == NULL){
       printf("The file can not opened.\n");
       ErrorExit();
   }
   else{
       printf("The file %s is opened successfully.\n",rbname);
   }

   //=========================================
   //=========parse binary Header
   uc = getc(f);
   len = uc << 8;
   uc = getc(f);
   len += uc;
   for (x = 0; x < len; x++)
       c = getc(f);