Elastic Sheep

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Entries Tagged as 'atmega32u4'

Serial Bluetooth module slave test

May 8th, 2011 · 20 Comments · Uncategorized

I am going to test the connection of a serial Bluetooth module to my Mac laptop. Serial data will be provided to the module through a Teensy 2 used as a USB-to-Serial adapter. Soldering the module on a breakout board The difficulty is to correctly align all the module pins to the breakout pads. The [...]

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Teensy2 USB WAV player – Part 2

June 29th, 2010 · 17 Comments · Uncategorized

[Update Jan 6th, 2011 / An error in the capacitor unit (pF instead of nF) has been fixed in the schematics] Long overdue post in my USB WAV player implementation series. Let’s go ! General architecture Here are the main software building blocks of the application: The left side is the USB Mass Storage implementation [...]

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Teensy2 USB WAV player – Part 1

April 28th, 2010 · 2 Comments · Uncategorized

I had plans to implement a small WAV playback application making use of a FAT32/SD card file access. Considering my published demo with SD card Mass Storage, the plan evolved to a more ambitious endeavour: implementing the basic blocks of a WAV player. The archetype model for this project is the MP3 player device. It [...]

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Teensy2 USB Mass Storage with an SD card

April 12th, 2010 · 36 Comments · Uncategorized

Iterating on my precedent post, the next logical step is to use the USB interface to access the SD card connected to the Teensy2/ATMEGA32U4 with a Mass Storage profile. LUFA Mass Storage demo The LUFA library offers a mass storage demo. It is based on the AT90USBKEY demonstration board that provides two onchip serial flash [...]

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Reading an SD card part 2: Teensy 2.0

January 14th, 2010 · 8 Comments · Uncategorized

I was eager to try the ATMEGA32U4 so I ordered a Teensy2. In this post I will adapt the sd-reader library previously tested with an ATMEGA168 to the Teensy2. Converting the Teensy2 to 3.3V The Teensy2 can be powered by a 3.3V regulator. The conversion is described here. The regulator is soldered underneath the board. [...]

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