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App for processor pin assignment?
Problem: I'm designing a shield for a Sparkfun SAMD21 board, it uses most of the available SAMD21 pins for GPS, HUB75 LED matrix display (or MAX7456 OSD), external oscillator and...
Saturday, 22 January 2022 - 14:31
How to configure SERCOM SPI master for multibyte transfers
Lars provided a skeleton program for single byte transfer using hardware control (CTRLB.MSSEN = 1), it works correctly I'm still fighting a program which should control a MAX7219...
Tuesday, 11 January 2022 - 21:23
SERCOM SPI interrupt enable bit unexpectedly cleared
In a program using a SAMD21 SERCOM as SPI in master mode I have the following code: SERCOM0->SPI.INTENSET.bit.TXC = 1; SERCOM0->SPI.INTENCLR.bit.DRE = 1;At entry the bit...
Monday, 10 January 2022 - 21:12
Where to find app sources for Microchip application notes
I'm writing a program for a SAMD21, part of it uses SERCOM SPI. There's an application note at https://ww1.microchip.com/downlo... which describes such an application. It...
Monday, 3 January 2022 - 17:17
Microchip Studio 7.0.2542 crashes at start, yet again
Back to the same problem as quoted below! I see the problem again, but only when I'm not the user Administrator, so it looks like an access denied error The logfile is attached I...
Tuesday, 16 November 2021 - 16:28
Which interrupt causes call of dummy handler?
An interrupt causes a program to call the dummy handler How can I see which interrupt it was using the ICE debugger? Thanks for any hints Jerry
Saturday, 23 October 2021 - 20:47
Microchip Studio 7.0.2542 crashes at start
After starting the program it displays the usual initial screen but displays the error message:   An exception was encountered while constructing the content of this frame....
Monday, 11 October 2021 - 19:50
New Errata Document for SAMD21
There is a new Errata document for SAMD21 at <https://ww1.microchip.com/downlo... The large number of errors described justifies the old quote from developers "Why test the...
Monday, 30 August 2021 - 07:55
Is reconfiguration of SERCOM_SPI MISO pin as input possible?
I'm writing a program for a SAMD21G to drive a MAX7219 8-digit 7-segment display controller over SPI. The MAX7219 only needs ~CS, SCLK and MOSI, but not MISO If I configure a...
Wednesday, 23 June 2021 - 15:26
Microchip Studio 7.0.2542 encounters exception at start
After de-installing Microchip Studio and the 2015 shell, then installing Rev. 7.0.2542 as suggested in https://community.atmel.com/foru... the program starts, produces the...
Friday, 12 March 2021 - 20:30
Microchip Studio 7.0.2542 crashes at start
After updating to the above rev. the program crashed at start. Error message "An exception has been encountered. This may be caused by an extension" The message box showed that...
Monday, 8 March 2021 - 18:00
Cortex M0+ hard fault documentation
A program ends up with a hard fault. I couldn't find a detailed description of the registers used - for instance the document doesn't describe the exception number in...
Tuesday, 18 February 2020 - 18:54