Elastic Sheep

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Entries from April 15th, 2009

Speeding up AVRISPMKII transfers

April 15th, 2009 · No Comments · Uncategorized

Last fall I got an AVRISPMKII to program some ATMEGA168 chips. The programming speed seemed OK back then. But my programs have been steadily growing up in size and soon I had to painfully watch a 4 min progress bar to program only 16kBytes of Flash! The solution: http://www.mail-archive.com/avr-chat@nongnu.org/msg01037.html http://wiki.dataflow.ws/Electronix/AvrIsp2OnOSX It appears the transfer clock [...]

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Testing the LUFA library on the Teensy

April 3rd, 2009 · 1 Comment · Uncategorized

LUFA is an open-source usb stack implementation from Dean Camera, suitable for the AVR family and thus the AT90USB162 on my Teensy board. The version I am starting with in this tutorial is LUFA090209.zip The CDC demo The Communication Device Class is a generic class that can be used for modem communication. In this case [...]

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Patching avrdude for OS X Tiger

April 2nd, 2009 · 1 Comment · Uncategorized

Until now I was using avrdude 5.3.1 provided with the OS-X AVR package to drive my AVR ISP mkII programmer. And everything was fine. Last week I needed to upgrade my AVR toolchain. OS-X AVR is not maintained anymore so instead I installed the lastest AVRMacPack containing avrdude 5.5. The result : nothing. The programmer [...]

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