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XMEGA32A4 ADC MUXNEG and accuracy
I know there are a lot of issues with the ADC of non-U models, but I have a system that works OK and I just need to add an ADC for measuring solar panel voltage (range 10-25 V)....
Monday, 18 March 2013 - 15:27
FatFs writing problem
I have been developing software for my Xmega-SD card-GLCD-several UART port system. I just noticed writing to SD card has stopped working. Reading works OK, opening file for...
Monday, 28 May 2012 - 14:14
Debugging help
I have a problem with corrupted variables. A string I define and initialize in main gets corrupted after a few seconds or in some cases a few minutes. I have a routine that keeps...
Saturday, 7 April 2012 - 19:46
Verification fails, flash toasted?
I finally got the ZeptoProg, but I can't write to Flash of the xmega32a4-au I have. Verification fails and read returns hex full of 0xFF. I have tried AVR Studio 4 and 5. Haven't...
Thursday, 12 January 2012 - 02:33
FatFs vs. Petit and fonts
I'm trying to fit SD card support, graphical LCD, several RS232 lines and some floating point calculations to xmega32a4 and I'm running out of space. Petit FatFs would be much...
Wednesday, 11 January 2012 - 11:10
PDI programming with FT232R
I finally soldered my XMEGA32A4 based board and now I should program it. Only PDI is available and I have some FT232R boards, that I'm trying to use for programming, but I didn't...
Monday, 26 December 2011 - 10:45
SDHC non-active current consumption
I'm trying to figure out is it necessary to shut off the power supply for the SDHC card in a low power application. I have found some current consumption data, but only for active...
Sunday, 4 April 2010 - 17:02
SDHC datalogging: write/erase cycles and SPI
I'm planning to log data on a SDHC card using xmega. There will be ~250 MB/year at a rate of 1 MB/h when active. Will limited write/erase cycles be a problem? I could use max 4...
Thursday, 1 April 2010 - 16:48
High side switch for 12 V
What is the best way to replace a manual switch and a thermostatic switch with switches controlled by AVR? These switches control 12 V signal and/or power (up to 1 A) and I'm not...
Monday, 22 March 2010 - 08:00