Elastic Sheep

Because elasticdog was already taken

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Entries Tagged as 'FAT'

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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Reading an SD card with an ATMEGA168

January 12th, 2010 · 35 Comments · Uncategorized

In this small week-end project, I will connect a SD card to an ATMEGA168 and try to read data from it. The SD card pin-out The SD card can be talked to with three different transfer modes: 1-bit SD mode, 4-bit SD mode and SPI mode. According to Wikipedia, all cards must support all three [...]

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