Hey guys,
I've been having trouble programming anything using my usbasp and I'm running out of options of things to try.
First off, the usbasp clearly works, but apparently only on one circuit I own - a custom PCB with an Atmega32 on it. Unfortunately the rest of the PCB is junk because I cocked up the Eagle packages, as you do.
I used to use a homemade programming cradle for mega8/168 etc, but even that's giving me a chip not responding message in avrdude. This worked in the past without any issues whatsoever.
I've checked continuity between the DIL socket and the 2x5 header - all fine. I've checked continuity down the ribbon cable - fine.
I just bought a couple of new Atmega324's to see if dead chips were the problem - they don't work either.
For atmega32's and pin compatibles (I've got Atmega324A's and Atmega324PA's here) I made a smaller dongle that plugs into a breadboard. It's basically an ISP breakout board with a 1 row, 6 way breakaway header to the board. Conveniently the Mega32 DIP package has MOSI, MISO, SCK, RESET, VCC and GND in a line. Sometimes using this one works - oddly enough it works more reliably if I press down on the chip as it's being read - but mostly it doesn't. The few times I can get the chip to write, it gives me a mismatch error at the first byte. Otherwise the device signature is usually borked, but often close to the actual - so it might read off 0x112200 instead of 0x112233.
Which all leads me to suspect it's a connection problem. The PCB doesn't seem to have any trouble and clearly that'll have better connections than a bread/stripboard. However, as I say, I've checked the continuity on everything and I'm at a loss.
Suffice to say I've tripled checked the pinout for the relevant chips, but here's a picture of the setup if in doubt:
Any suggestions welcome!
e.g. output:
$ avrdude -p m324pa -c usbasp -v -U flash:w:test.hex
avrdude: Version 5.6, compiled on Jun 10 2011 at 04:15:12
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
System wide configuration file is "/usr/local/etc/avrdude.conf"
User configuration file is "/Users/Josh/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e9511
avrdude: safemode: lfuse reads as 62
avrdude: safemode: hfuse reads as 99
avrdude: safemode: efuse reads as FF
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: current erase-rewrite cycle count is -256 (if being tracked)
avrdude: erasing chip
avrdude: reading input file "test.hex"
avrdude: input file test.hex auto detected as Intel Hex
avrdude: writing flash (8006 bytes):
Writing | ################################################## | 100% 5.01s
avrdude: 8006 bytes of flash written
avrdude: verifying flash memory against test.hex:
avrdude: load data flash data from input file test.hex:
avrdude: input file test.hex auto detected as Intel Hex
avrdude: input file test.hex contains 8006 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 4.00s
avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0000
0x1f != 0x00
avrdude: verification error; content mismatch
avrdude: safemode: lfuse reads as 0
avrdude: safemode: hfuse reads as 0
avrdude: safemode: efuse reads as 0
avrdude: safemode: lfuse changed! Was 62, and is now 0
Would you like this fuse to be changed back? [y/n] n
avrdude: safemode: hfuse changed! Was 99, and is now 0
Would you like this fuse to be changed back? [y/n] n
avrdude: safemode: efuse changed! Was ff, and is now 0
Would you like this fuse to be changed back? [y/n] n
avrdude: safemode: Fuses OK
avrdude done. Thank you.
or
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e9500
avrdude: Expected signature for ATMEGA324PA is 1E 95 11
Double check chip, or use -F to override this check.
avrdude done. Thank you.
