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Why use an external 32.768KHz Crystal on SAMD21 / SAML21
It seems that most boards have the 32KHz external crystal hooked up to the XTAL pins, but most of the examples aren't configured to use it (specifically the XPlained and examples...
Sunday, 24 June 2018 - 02:51
Issues with memcpy on SAML21
I have been chasing a really nasty bug and I think I have narrowed it down to memcpy. Is there some delay or asynchronous nature to memcpy that I should be aware of, perhaps...
Tuesday, 12 June 2018 - 23:14
RTC periodic event / interrupt
I am using the RTC in a SAML21 to keep track of time. It is using the OSCULP32K 1 kHz output as the driving clock for the RTC. I also have TC4 set up as a 16-bit counter also...
Saturday, 2 June 2018 - 09:35
ASFv4 CDC USB sending garbage data when used with freeRTOS
I am having a strange issue where the ASFv4 CDC USB driver is losing packets and printing out garbage data. I "solved" the lost packets issue by adding a delay after every send,...
Monday, 21 May 2018 - 09:08
XMega Fulle Speed USB with low CPU voltage
I have been working on replacing an old serial protocol with USB. I have been using a dev board but today learned the real system runs at 1.8V with a CPU frequency of 12MHz. 12MHz...
Tuesday, 11 July 2017 - 20:17