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What is the correct ADC clock for XMEGA devices?
Can someone help me understand why I can't seem to get good results when following the recommendations in the datasheet?   When measuring external signals the sample rate...
Tuesday, 10 February 2015 - 14:55
atprogram won't work outside the Atmel Studio directory
Hi.   If I run atprogram from where it is installed (C:\Program Files (x86)\Atmel\Atmel Studio 6.2\atbackend) it works. If I copy the atbackend, devices and tools directories...
Tuesday, 20 January 2015 - 14:40
E5 temperature sensor and ROOMTEMP / HOTTEMP
Has anyone used the ROOMTEMP and HOTTEMP calibration data from an E5's production signature row? They don't seem to be documented in the manual or datasheet very much. Neither...
Monday, 5 January 2015 - 16:21
Noisy 32.768KHz crystal?
We have discovered that our 32.768KHz watch crystal is generating a lot of noise on our ADC measurements. We sample audio at 5KHz, and there is a big spike at around 2KHz with the...
Wednesday, 3 December 2014 - 09:10
AES multiple blocks / XOR mode
Can anyone shed some light on how the XOR mode of the AES module is supposed to be used? The datasheet says that it XORs what you write to the state memory with the existing...
Wednesday, 26 November 2014 - 15:58
Placing __func__ in PROGMEM
Is there any way to place __func__ in program memory? By default it is defined as "static const char" which goes in RAM. If you use it a lot it will quickly waste all your RAM on...
Wednesday, 5 November 2014 - 10:44
PDI programming protocol
I'm writing some code to program one XMEGA with another, using the PDI protocol. I can talk to the target device and access it's NVM controller, but only after I observed what a...
Tuesday, 7 October 2014 - 14:26
SPI slave corruption on A3U
Hi. I am using an XMEGA 256A3U as an SPI slave to read an I2S audio signal. I have the same set up running on a E5 and it works perfectly. I2S WCLK -> SS I2S BCLK -> CLK I2S DATA...
Friday, 5 September 2014 - 08:56
XMEGA USART baud rate calculator
https://docs.google.com/spreadsh... Based on an Excel spreadsheet by an unknown author. Enter the CPU clock and desired baud rate at the top. The table will update (can take a few...
Wednesday, 2 July 2014 - 15:04
nonull attribute
I'm trying to apply the "nonull" attribute to some functions but the compiler keeps giving me a "Warning 'nonull' attribute directive ignored [-Wattributes]" message. The code is...
Tuesday, 24 June 2014 - 14:27
AVRISP mkII being discontinued?
Has anyone heard anything about the AVRISP mkII being discontinued? Farnell list it as "until stocks are exhausted" and RS no longer carry it at all. Is it due to be replaced or...
Wednesday, 11 June 2014 - 08:16
E5 EDMA infinite repeats (ring buffer)
Is it me or has Atmel removed the ability for the E5 EDMA to do infinite repeats like the older XMEGA DMA controllers? Before you could set the repeat count to zero and it would...
Thursday, 29 May 2014 - 10:52

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