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DIY analogue clock project
Need some help with stepper motors and mechanical stuff for a clock project. The idea is to have 3 analogue clocks in perfect sync, with sweeping second hands. Current plan is for...
Monday, 26 July 2021 - 13:45
Unexpected offset voltage on ADC pin
Hi. I have a strange problem where I'm seeing an unexpected voltage when trying to measure a high voltage supply rail with an XMEGA MCU. The schematic is as follows:  ...
Thursday, 24 June 2021 - 13:56
Should I be doing something different to avoid this inefficient code?
I am setting up a peripheral like so:   const __flash struct { USART_t *usart; struct { DMA_CH_t *ch; uint8_t trigsrc_rxc; uint8_t trigsrc_dre; volatile uint8_t...
Monday, 7 June 2021 - 16:05
Differences between the A3U and A1U USB peripheral
I'm trying to port some code from the A3U to the A1U. I read the errata, the USB on the A1U is a bit broken... It's a 64A1U if that matters.   Anyway I am at the point where...
Wednesday, 2 June 2021 - 15:05
Detecting RAM errors, anyone got experience?
I was just writing some code to implement a MARCH C- test for RAM errors on an XMEGA. I see there are a number of different strategies for testing RAM and MARCH C- is supposed to...
Thursday, 6 May 2021 - 13:49
4MB SRAM with 4 port EBI
Hi. I am trying to add 4MB (32 megabits) of SRAM to an XMEGA A1U. The documentation is not great and I'm struggling to understand how the ports are assigned.   I was planning...
Thursday, 29 April 2021 - 21:40
Microchip Studio crashes when trying to display files side-by-side
I upgraded from Atmel Studio 7 which was working fine. Now when I try to tear off a document tab and display it side-by-side Microchip Studio crashes.   I have tried the...
Monday, 26 April 2021 - 08:37
ATTINY1627/26/25/24 availability
Anyone know when the 1627/26/25/24 will become available?   I need two UARTs and 5V operation, with XMEGA architecture.
Wednesday, 20 November 2019 - 10:21
USB host HID support
I want to read a USB joystick using USB Host/OTG on an MCU.   The AT90USB647 looks ideal because it can be run at 5V which is useful to me, but the ASF does not have any USB...
Saturday, 8 December 2018 - 23:44
Smallest USB SAM with factory programmed bootloader
Simple question: What is the physically smallest (i.e. lowest pin count) SAM with USB and a factory programmed bootloader?   It seems that he D and L series don't have...
Tuesday, 27 November 2018 - 16:13
USB and NFC dongle
I'm investigating options for building a USB key with NFC, and looking for some advice on parts and from people who have worked with NFC before.   The basic concept is a...
Wednesday, 21 November 2018 - 14:33
atprogram hangs for several minutes, then works fine
I'm trying to do factory programming with atprogram (I know, use avrdude, this is a mature system so re-writing part of it is the last resort).   Most of the time it's fine,...
Wednesday, 27 June 2018 - 14:31

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