AVR-ISP-MK2 and macOS X not working

Started by jbz, January 04, 2018, 03:01:41 PM

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I recently purchased an AVR-ISP-MK2 through Farnell. Despite following instructions to deal with avrdude bug, I cannot connect to it on a Mac. In particular, running avrdude -v -p atmega328p -P usb -c avrispmkii -C avrdude.conf gets me
avrdude: usbdev_open(): Found AVRISP mkII, serno: 000200312345
avrdude: stk500v2_command(): command failed
avrdude: stk500v2_program_enable(): bad AVRISPmkII connection status: Unknown status 0x00
avrdude: initialization failed, rc=-1

I did follow instructions https://www.olimex.com/forum/index.php?topic=5781.0 which involves installing the libusb firmware (which I take is the same as here: https://www.olimex.com/Products/AVR/Programmers/AVR-ISP-MK2/resources/AVR-ISP-MK2-Firmware-WindowsDrivers.zip, which just to be sure I also tried) and then compiling a patched version of avrdude 6.3 (patch from here: https://www.olimex.com/Products/AVR/Programmers/AVR-ISP-MK2/resources/endpointdetect_pass1.patch; I tried both the included patched version from the instructions as well as applying the patch myself).

For reference, using my old usbTinyISP I can read/write the Arduino board (with ATMega328P) without issues.
What am I missing?


Did you also change the firmware of AVR-ISP-MK2 as the guide suggests?

Did you test with older version of AVRDUDE (versions prior to 6.x.x, like 5.x.x)? Such a test would determine if it is the endpointdetect_pass bug. If you are using Arduino IDE, then get version 1.5.7 or older (the last suitable Arduino IDE version that uses pre-6.x.x AVRDUDE version is Arduino IDE 1.5.7).

Best regards,
Technical support and documentation manager at Olimex


I did change the firmware, and I also tried older versions of avrdude (compiled 5.9), to no avail.


It can be something else, not related to the software installation. You mentioned that Usbtinyisp works fine. Usbtinyisp has two ISP connectors - 6-pin and 10-pin one. Did you notice that AVR-ISP-MK2 has NO 6-pin ISP connector; and only a 10-pin ISP connector?

Edit: This error might also appear if the target is not powered or insufficiently powered; how do you power the target ATmega328p? If you power it from the AVR-ISP-MK2, are the jumpers set properly?
Technical support and documentation manager at Olimex


 :-[ D'oh. It'll be the ISP connector. It didn't even occur to me they might not be the same. Cannot test it now, but that'll be it. Sorry for the waste of your time.