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Storing and retrieving variable length data in RAM and NV memory
I'm planning a data logging system that needs to log various values, and store various configuration parameters. The logged data and config parameters can be all sorts of things,...
Monday, 22 August 2016 - 14:01
Asynchronous timers in sleep modes on E5?
Has anyone tried running timers asynchronously on an XMEGA E5?   The event system says that it works in all sleep modes. Async input sense is available on various pins. You...
Tuesday, 9 August 2016 - 13:50
Maximum input voltage to ADC with 0.5x gain
Normally the highest voltage that the ADC can measure is AREF. Say you select the 0.5x gain setting. Could you measure voltages above AREF as long a they are scaled down below it...
Friday, 29 July 2016 - 22:44
Instrument functions on XMEGA (function pointer size problem)
I'm having a problem using -finstrument-functions on an XMEGA 128A3U. I get "'builtin_return_address' contains only 2 bytes of address [enabled by default]" when compiling. My...
Monday, 18 July 2016 - 12:49
Timestamp / build number tool
I just knocked up a little timestamp / build number generation tool that might be of use to other freaks: https://github.com/kuro68k/times...   You can use it as part of...
Wednesday, 13 July 2016 - 12:55
USB on the AT90USB646/647 missing
I'm trying to set up the ASF USB tack on an AT90USB646. I tried a 647 too, just in case. The USB service doesn't appear in the list:     Am I missing something? Does...
Tuesday, 5 July 2016 - 15:08
USB CDC issues with Windows 10
I'm having some problems with a USB CDC device under Windows 10, using the ASF 3.31.   It seems like the new usbser.sys drive is quite aggressive at suspending the...
Friday, 20 May 2016 - 11:16
SAM C20/C21 availability (need 5V tolerant I/O)
Anyone know when SAM C21s will become available? The Xplained boards are around and they were announced in October 2015, but the only place I can't find anywhere that stocks the...
Monday, 16 May 2016 - 10:16
Region folding bug in AS7.0.790
The following code doesn't fold properly:   int main(void) { //CCP = CCP_IOREG_gc; // unlock IVSEL //PMIC.CTRL |= PMIC_IVSEL_bm; // set interrupt vector table to...
Friday, 29 April 2016 - 10:48
Getting the compiler to properly optimize this code
Hi. I'm trying to get GCC to properly optimize some code. The particular file (and entire project) is here: https://github.com/mojo-chan/Sup...   The platform is XMEGA (...
Friday, 15 April 2016 - 09:01
XMEGA NVM CRC
Because people asked about it before, and I just found the code...   // Matches the AVR NVM flash CRC command CRC public static UInt32 avr_flash_crc_24(ref byte[] buffer...
Tuesday, 22 March 2016 - 09:41
Future of XMEGA
With the impending takeover and no recent news, does anyone have any insight into the future of the XMEGA range? New models, long term development? Personally I'd love to see a...
Sunday, 24 January 2016 - 18:50

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