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V-USB ported to XMEGA
I ported V-USB, the software USB stack from Objective Development for MEGA/TINY AVRs to XMEGA.   https://github.com/kuro68k/vusb-...   It's not tested much yet and still...
Thu. Feb 16, 2017 - 04:11 PM
Locator beacon idea using LoRa, comments please
Morning all. I have an idea I'd like to discuss for a new open source hardware device.   Yesterday my cat didn't come home all day, and I was worried. He's back now, but I'd...
Thu. Feb 16, 2017 - 09:29 AM
avr-nm and avr-size RAM use
I'm trying to get firmware designed for 8k RAM down to 4k RAM. avr-size reports:   Program Memory Usage : 65160 bytes 46.8 % Full Data Memory Usage : 5679 bytes...
Thu. Feb 9, 2017 - 10:48 AM
EDMA to DAC on E5
Hobby project time, I'm trying to DMA data from RAM to the DAC on an E5.   Everyone else who has done this seems to be using the EDMA in standard channel mode, rather than...
Mon. Dec 26, 2016 - 12:08 AM
E5 SPI buffer modes
I'm trying to understand the XMEGA E5 SPI peripheral's buffer modes. The manual states:    Buffered mode 2: The SPI module is single buffered in the transmit direction and...
Thu. Oct 20, 2016 - 08:02 AM
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,...
Mon. Aug 22, 2016 - 02:01 PM
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...
Tue. Aug 9, 2016 - 01:50 PM
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...
Fri. Jul 29, 2016 - 10:44 PM
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...
Mon. Jul 18, 2016 - 12:49 PM
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...
Wed. Jul 13, 2016 - 12:55 PM
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...
Tue. Jul 5, 2016 - 03:08 PM
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...
Fri. May 20, 2016 - 11:16 AM

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