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xmega deep sleep + uart wake up?
I have working code that accepts 4 UART inputs, does simple data manipulation, and outputs all the data through a 5th UART. The circuit must consume as low power as I can get the...
Monday, 31 October 2016 - 16:34
xmega pull up / pull down resistors for the entire port at once?
Perhaps I'm missing out on something but I can not find the way to set pull up or pull down resistors on the xmega.   Let's say I want to configure port B to have all pins as...
Sunday, 30 October 2016 - 17:49
Which bias capacitors for 32.768Khz crystal?
I want to use an external watch crystal for run-time calibration source for the 2MHz internal oscillator. I have seen in AVR1012: XMEGA A Schematic Checklist that there are...
Saturday, 29 October 2016 - 10:01
Problems compiling LUFA from the Extentions lib
I'm currently writing a small project on an Xmega, never used ASF drivers before. I have installed LUFA extension from the gallery. Using ASF wizard I've added the RingBuffer...
Thursday, 20 October 2016 - 22:03
A more efficient implementation of a ring buffer?
I'm starting out with a fairly (non safe) trivial implementation of a ring buffer: struct ringBuffer{ char buffer[256]; uint8_t writeIndex; uint8_t readIndex; }ringBuffer...
Wednesday, 12 October 2016 - 13:39
simple powering from 3.3/5v & UART interfacing to 3.3/5v?
I'm just starting out with my first program for the xmega series and stumbled upon a problem. I'm powering and interfacing the AVR from the device that is connected to it as the...
Saturday, 8 October 2016 - 09:30
5 UARTs (half duplex) on a single AVR?
I need to be able to receive (Rx) UART from 4 different sources, merge them together, and output to a single Tx. All this has to be low power so I must use an AVR that works on...
Monday, 3 October 2016 - 10:25
phone -> wireless -> mass storage ... hoping for some ideas to get me going
My car's CD player has a USB port which accepts mass storage devices and is able to playback MP3 files and some other supported formats.   I would like to build an adapter...
Friday, 9 September 2016 - 20:41
No MIDI library for AVR ?!?
It seems that there are a few MIDI libraries for the Arduino but I would rather use something specifically written for the AVR with a small overhead if possible. I did manage to...
Sunday, 31 July 2016 - 17:45
Can't figure out the problem with UART
I'm using the very simple Peter Fleury UART library on an ATmega168A.   The following code is being used: #define F_CPU 2500000UL #define UART_BAUD_RATE 31250...
Monday, 11 July 2016 - 16:38
Trying to burn Arduino code using Studio 7
I have messed up the firmware on a 3D printer board and I'm trying to burn the AVR using the ISP header (usually being done serially but does not work now). I start a new project...
Sunday, 3 January 2016 - 19:20
Studio 7 (7.0.634) can't see Atmel ICE debugger
I've installed the latest Studio , when I connect the the Atmel ICE I can't see anything happening however the middle LED does light up so i guess the connection is solid. I've...
Saturday, 21 November 2015 - 12:29

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