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Data Memory Overflow after installing AS6 production release
ATXMEGA32A4U, Optimization is -Os Data memory increased from 3794 bytes to 4920. Clues? The only change in the code was adding "const" to PROGMEM variables, the compiler was...
Thursday, 10 May 2012 - 20:46
Automatically inline function ?
Shouldn't the compiler be smart enough to inline functions that are called just once? I am using -Os optimization. I have to define the function myself as inline for it to be...
Wednesday, 9 May 2012 - 06:59
Where is AVR4001?
The ASF USB Device Vendor Example refers to AVR4001 application note, but I can't find it.
Monday, 23 April 2012 - 14:07
XMEGA USB can't clear interrupt flag
My ISR(USB_TRNCOMPL_vect) interrupt keeps reentering, I use: USB.INTFLAGSBCLR=USB_SETUPIF_bm|USB_TRNIF_bm; which generates: 00003DE1 LDI R24,0x03 00003DE2 LDI R30,0xC0...
Saturday, 21 April 2012 - 15:49
XMEGA wish list
Simple things that would make the XMEGA better: 1) ADC: Eliminate the fixed offset voltage in single ended signed mode. This would allow to work easily with signals that swing up...
Friday, 13 April 2012 - 15:25
EEPROM getting corrupt
I just noticed that if I have a power supply that rises or decreases its voltage slowly, I will get my EEPROM corrupt. My fuse settings: Brownout continuous when active Brownout...
Saturday, 31 March 2012 - 03:50
Compiling for A4 vs A4U: different size
I just noticed that the compiler generates code of different size when changing from A4 to A4U. Currently, the code doesn't use anything new from the A4U. I was expecting the size...
Thursday, 29 March 2012 - 01:31
Small population not entering USB bootloader
I have built a few hundred Xprotolabs, using the ATXMEGA32A4U. After programming them, about 5 to 10% are not entering the USB bootloader. In the bootloader code, I turn on a red...
Wednesday, 21 December 2011 - 16:41
48MHz USB Clock Generation
Confussing section 20.5 in the XMEGA AU manual: "It can be clocked from internal or external clock sources by using the internal PLL, or directly from 32 MHz internal oscillator...
Friday, 18 November 2011 - 22:05
FREE XMEGA! (Collaboration project)
I would like to sponsor a project using the new XMEGA with USB chips, especifically the ATXMEGA32A4U. I can offer (just a few) free Xprotolab 1.7 boards to qualifying participants...
Tuesday, 11 October 2011 - 13:51
ATXMEGA32A4U not defined in sleep.h
Self explanatory. Any advice?
Monday, 19 September 2011 - 18:30
Xmega with USB - How to start?
I have my first Xprotolab prototype using the XMEGA with USB microcontroller (you can take a look at the schematic here). The Xprotolab is working, although no USB yet. I have...
Monday, 19 September 2011 - 01:31

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