Hello,

I am trying to test my new wisp628 programmer and first (breadboarded)
'design', but the program will not get loaded.

Purpose: try to load and run blink a led program in PIC 16f877a
Hardware: laptop, USB-Serial converter, wisp628 programmer (new,  assembled
from kit, never tested before), breadboard with PIC 16f877a  (new, first
trial)
Software: Windows XP (cmd.exe window), Xwisp2w, b877-2.hex


LoG from Xwisp2:

 xwisp2 version 1.9.2 for Windows   /   Sat Jan 20 13:35:24 2007

 Commandline:
   K:\XWisp2\EXECUT~1\XWISP2~1\xwisp2w.exe port 5 verbose log abc target
16f877a beep go b877-2 

     time    event
 ----------+--------------------------------
    +0.651 | WbusHello echotest failure: sent 'a' received: '',  unexpected.
    +0.881 | {break}
    +0.891 | WbusHello()
    +1.132 | WbusType(Wisp628)
    +1.242 | WbusVersion(1.09)
    +1.252 | WbusPassThrough(0044)
    +1.352 | WbusProgram(004f)
    +1.362 | WbusJump(00400c)
    +1.412 | WbusRead(00400c : 0000)
    +1.422 | WbusProgram(003f)
    +1.462 | WbusJump(3ffffe)
    +1.512 | WbusRead(3ffffe : FF)
    +1.542 | WbusRead(3fffff : FF)
    +1.562 | WbusProgram(002e)
    +1.602 | WbusProgram(002c)
    +1.622 | WbusWrite(000000 : 2804)
    +1.643 | WbusIncrement()
    +1.653 | WbusIncrement()
    +1.673 | WbusIncrement()
    +1.683 | WbusIncrement()
    +1.703 | WbusWrite(000008 : 30ff)
    +1.723 | WbusWrite failure, rc 21

In DOS Window:


 xwisp2 version 1.9.2 for Windows <Dec 04 2006, Open Watcom C 1.50>
Reading file 'b877-2'
File b877-2.hex loaded and is Intel Hex format conforming
Total of program and data memory: 204 bytes
Initializing serial port: COM5
Portspeed min: 50, max 115200, cur 1200
Portspeeds new: 19200
DTR On, RTS Off
DTR Off, RTS Off
Programmer not active, trying to activate
Portspeed min: 50, max 115200, cur 19200
Detected programmer: Wisp628, firmware version 1.09
Switching communications speed from 19200 to 115200 bps
Portspeed min: 50, max115200, cur 19200
Portspeeds new: 115200
Trying 14 bits core family (provisional target 12F629)
Detected target deviceID: FFFF
Trying 16 bits core family (provisional target 18F1220)
Detected target deviceID: 0000
Target not auto-detected, using specified target: 16F877a
Programming algorithm 2 (PIC16B)
Target erased
Transferring program to 16F877A via Wisp628
Transferring program memory...Wbus command failure
Write-Verify operation failed after 0.17 seconds, rc21!
Portspeed min: 50, max 115200, cur 115200
Portspeeds new: 1200
DTR Off, RTS Off
xwisp2 failed after 2.72 seconds, rc 21!



Other findings:

Led stays OFF
Tx and Rx leds in Usb to serial converter both flash
MCLR rises to 12.5 Volt and stays 12.5 V



I did check all wiring a hundred times now. Can anybody  help me further? 

Thanks Jos

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