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Control an LED matrix display with SAMD21
I want to control a 16x32 LED matrix display with a SAMD21. Does anyone have an app for this, also the schematic of the display? There are very many descriptions of the...
Friday, 25 March 2022 - 20:00
__attribute__ documentation and declaring variable in program memory
Is there complete documentation for __attribute__ anywhere? I'm using Visual Studio with GNU/C for a SAMD21 How does one use __attribute__ in the declaration of a...
Thursday, 3 February 2022 - 18:19
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