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Can the micro running LUFA execute other tasks?
I am looking into integrating USB to my projects and LUFA seems to be the way to go. Since I would be adding another microcontroller (AT90USB) to run the LUFA, I am wondering if...
Friday, 19 March 2010 - 20:33
Help implementing a custom logarithm
I need logarithm-like function with a 16bit operand that will fit the result in an 8 bit integer. An example would be: y = 53 * log(x) So 53*log(65535)=255 But of course, I want...
Thursday, 18 February 2010 - 05:33
Arguments passed to asm function
Do I need to save and restore the registers where arguments are passed in an assembly function? Probably the answer is here: http://www.nongnu.org/avr-libc/user-manual/FAQ.html#...
Thursday, 14 January 2010 - 16:40
Help with SN74LVC1G3157 SPDT switch [solved]
I'm designing an XMEGA based oscilloscope: http://www.gabotronics.com/development-boards/xmega-xmultikit.htm I am having trouble with the SPDT switch that connects both channels...
Sunday, 27 December 2009 - 07:37
XMEGA fuses in source code or project settings
Everytime I debug my XMEGA project, I get a message: "The device's EESAVE fuse is currently programmed, but the project settings does not specify that EEPROM should be preserved....
Monday, 21 December 2009 - 23:42
XMEGA JTAG Debugging -> EEPROM bad init
I just got my new JTAGICE mkII, I'm trying it out debugging on my XMEGA project. Everything looks ok except that the EEPROM does not get initialized properly, some values in an...
Saturday, 18 July 2009 - 01:57
XMEGA A1 external RAM choice ?
I want to add at least 4MBytes to an XMEGA A1. I want to use a minimum of parts, so using a 4bit memory is ok. I see that the XPLAIN uses a MT48LC16M4A2TG, but I can't find where...
Thursday, 9 July 2009 - 16:01
XMEGA Compare/Capture module bug?
Either I'm doing something wrong, or there is a bug on the XMEGA. I am trying to generate a frequency on pin PF3, I am using the Frequency Waveform Generation as described in...
Friday, 3 July 2009 - 05:15
Can't compile with optimization -O0 [solved]
Need some help here... I can't compile with optimization O0, I get this message: c:\temp/cczRGLOh.s: Assembler messages: c:\temp/cczRGLOh.s:3584: Error: constant value required (...
Monday, 29 June 2009 - 14:31
XMEGA XMultiKit / Xmegalab MSO & AWG
The Xmegalab is the next version of the project. The Xmegalab / XMultiKit are development boards for the AVR XMEGA microcontrollers, dual channel oscilloscopes, arbitrary waveform...
Tuesday, 23 June 2009 - 19:59
XMEGA GPIO register name discrepancy
In the AVR XMEGA A Manual, section 4.18.1, the general purpose registers are named as GPIORn. But avr-gcc, file iox128a1.h, has defined them as GPIOn (without the R)
Tuesday, 2 June 2009 - 22:15
How to initialize XMEGA EEPROM?
I am trying to find out how to initialize EEPROM data directly on the source code, so building the project would fill the EEP file. I am using avr-gcc. On normal AVRs, I...
Saturday, 30 May 2009 - 20:41

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