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I have a project that uses an SD Card on the SPI interface.  I also wanted to add a small amount of extra EEPROM.  The EEPROMs come in SPI and TWI interfaces....
Monday, 19 August 2019 - 12:40
SD Card 5v to 3.3v level shifting for AVR
I've got two SD Card modules with onboard 5v to 3.3v conversion however they are implemented quite differently.  They both have 1117 LDO regulators for 3.3v.  One...
Sunday, 14 April 2019 - 14:08
Petit FatFS implementation
I've been reading up on Petit FatFS and trying to implement it for a few days now with no success.  Throughout my trials one thing I keep encountering is 'undefined reference...
Saturday, 6 April 2019 - 21:22
Error programming with SD Card reader interfaced to SPI
I have a very basic circuit circuit setup with an Atmega 8515, LED w/resistor, reset button, bypass cap, and an SPI interface to an AVR Dragon.  No issues in Atmel...
Thursday, 4 April 2019 - 13:48
Misc registers for GP?
Beyond the GPIOR's... what's the consensus on using other registers for general purpose?  For example the OCR1x's if Timer/Counter1 isn't being utilized?  Are...
Sunday, 30 December 2018 - 14:48
ATtiny external interrupt
Migrating from Arduino to AVR's & Atmel Studio 7 I'm having a hard time with external interrupts.  I've poured over the datasheet countless times, Googled the...
Saturday, 1 December 2018 - 19:54