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Altera_Forum
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18 years ago

CHANGE_EDREG JTAG instruction via a JAM file

AN357 mentions the ability to test the CRAM CRC error detection circuitry by passing a CHANGE_EDREG JTAG instruction via a JAM file. Anyone knows where I can find more details on the implementation ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

I struggled finding info on this topic and on STAPL anywhere on the web. I created a STAPL program that works for me on Cyclone IV and wanted to share. 

NOTE "CREATOR" "Manually Created";
NOTE "DATE" "12 Feb 2018";
NOTE "STAPL_VERSION" "JESD71";
NOTE "ALG_VERSION" "1";
NOTE "DEVICE" "EP4CE22";
NOTE "CHECKSUM" "UNSPECIFIED";
NOTE "IDCODE" "00000000";
NOTE "USERCODE" "UNSPECIFIED";
NOTE "TARGET" "UNSPECIFIED";
NOTE "STACK_DEPTH" "4";
NOTE "MAX_FREQ" "1000000";
ACTION SIM_CRAM_ERROR = 
  DO_CRC_REG_WRITE,
  PRINT_CAPTURE_RESULT;
  
ACTION SIM_CRAM_ERROR_AND_RESET = 
  DO_CRC_REG_WRITE,
  PRINT_CAPTURE_RESULT,
  DO_CRC_REG_RESTORE;
DATA globalVariables;
  BOOLEAN originalRegisterValue =$FFFFFFFF;
  BOOLEAN instCode_CHANGE_EDREG = $015;
ENDDATA;
PROCEDURE DO_CRC_REG_WRITE USES globalVariables;
 
  Print "Writing 0xFFFFFFFF to 32-bit CRC storage register.";
  DRSTOP IDLE;
  IRSTOP IDLE;
  STATE RESET;
  IRSCAN 10, instCode_CHANGE_EDREG;
  DRSCAN 32, originalRegisterValue, CAPTURE originalRegisterValue;
  STATE IDLE;
  
ENDPROC;
PROCEDURE DO_CRC_REG_RESTORE USES globalVariables;
 
  Print "Restoring original value to 32-bit CRC storage register after 1 sec wait.";
  WAIT 1000000 USEC;
  
  DRSTOP IDLE;
  IRSTOP IDLE;
  STATE RESET;
  IRSCAN 10, $015;
  DRSCAN 32, originalRegisterValue, CAPTURE originalRegisterValue;
  STATE IDLE;
ENDPROC;
PROCEDURE PRINT_CAPTURE_RESULT USES globalVariables;
  
  Print "Original value = ", 
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue,
    originalRegisterValue;
     
ENDPROC;
'END OF FILE