[avrdude-dev] Programming Failures

[JLDSystems]

Hi Gang,

I really frustrated with my ATMega8515s tonight.

I am using a Compaq 1.8 Ghz, with XP Home, GiveIO, Avrdude 4.3.

I have 26 devices in front of they all have the same date code. They are all 
fresh from the distributor. 

I have a vector board with an Emulation Technology LQFP zif socket on it. It 
also has a +5v power supply, a reset circuit, a 8mhz crystal with two caps and 
10 segment bargraph LED.

20 devices program satisfactorily, 6 fail repeatedly.

I have LEDs connected to the MOSI, MISO, SCK, Reset, +5V, PA0-PA4.

I can insert any part and try reprogram it. The failures always fail and the 
pass always pass.

Observing the LEDs on the failures I never see any change of state on the 
MISO line. Pin 2, PB6. I do see it on the devices that pass.

The command and program output is shown below.


C:\Projects\BLACKH~1\AAV-88>avrdude -c picoweb -p m8515 -F -e -v

avrdude: Version 4.3.0
         Copyright (c) 2000-2003 Brian Dean, address@hidden

         System wide configuration file is "C:\WinAVR\bin\avrdude.conf"

         Using Port            : lpt1
         Using Programmer      : picoweb
         AVR Part              : ATMEGA8515
         Chip Erase delay      : 9000 us
         PAGEL                 : PD7
         BS2                   : PA0
         RESET disposition     : dedicated
         RETRY pulse           : SCK
         serial program mode   : yes
         parallel program mode : yes
         Memory Detail         :

                                     Page                       Polled
           Memory Type Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ------ ------ ---- ------ ----- ----- ---------
           eeprom      no        512    0     0  9000  9000 0xff 0xff
           flash       yes      8192   64   128  4500  9000 0xff 0xff
           lfuse       no          1    0     0  2000  2000 0x00 0x00
           hfuse       no          1    0     0  2000  2000 0x00 0x00
           lock        no          1    0     0  2000  2000 0x00 0x00
           calibration no          1    0     0     0     0 0x00 0x00
           signature   no          3    0     0     0     0 0x00 0x00

         Programmer Type : PPI
         Description     : Picoweb Programming Cable, http://www.picoweb.net/
           VCC     = 0x00 (not used)
           BUFF    = 0x00 (not used)
           RESET   = 2
           SCK     = 3
           MOSI    = 4
           MISO    = 13
           ERR LED = 0
           RDY LED = 0
           PGM LED = 0
           VFY LED = 0

avrdude: AVR device not responding
avrdude: initialization failed, rc=-1
avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0xffffff
avrdude: Yikes!  Invalid device signature.
avrdude: erasing chip
avrdude: AVR device not responding

avrdude done.  Thank you.


Does anyone have a clue why 20% of my devices are failing?


Jeff
www.jldsystems.com