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Sercom SPI library for ATSAMD21 boards such as Arduino Zero and Adafruit Feather M0

License: GNU General Public License v3.0

C++ 100.00%
spi slave spislave sercom samd21 atsamd21g18a arduino-library cortex-m0 arduino-zero arduino-mkr

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sercomspislave's Issues

Example Sercom0SPISlave can't be compiled with Arduino IDE 1.8.19 + Adafruit Feather M0 (SAMD21) board selected 

c:/users/user1/appdata/local/arduino15/packages/adafruit/tools/arm-none-eabi-gcc/9-2019q4/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: core\variant.cpp.o: in function `SERCOM0_Handler':
C:\Users\user1\AppData\Local\Arduino15\packages\adafruit\hardware\samd\1.7.10\variants\feather_m0/variant.cpp:131: multiple definition of `SERCOM0_Handler'; sketch\Sercom0SPISlave.ino.cpp.o:C:\Users\user1\Documents\Arduino\libraries\SercomSPISlave\examples\Sercom0SPISlave/Sercom0SPISlave.ino:53: first defined here
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Adafruit Feather M0 (SAMD21).

Sending data to and receiving data from master

Dear lenvm,

Thank you for publishing your repository. I have an issue with using your SERCOM4 code. The pins that I'm using:

  • MISO PA12
  • MOSI PB10
  • SCK PB11
  • SS PA13

The pin configurations:
//Configure SERCOM4 SPI PINS
//Set PB10 as input (MOSI)
//Set PB11 as input (SCK)
//Set PA13 as input (SS)
//Set PA12 as output (MISO)
PORT->Group[PORTB].PINCFG[10].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM4 SPI PA12 Arduino PIN22
PORT->Group[PORTB].PMUX[6].bit.PMUXE = 0x3; //SERCOM 4 is selected for peripheral use of this pad (0x3 selects peripheral function D: SERCOM-ALT)
PORT->Group[PORTB].PINCFG[11].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM4 SPI PB09 Arduino PIN16
PORT->Group[PORTB].PMUX[4].bit.PMUXO = 0x3; //SERCOM 4 is selected for peripheral use of this pad (0x3 selects peripheral function D: SERCOM-ALT)
PORT->Group[PORTA].PINCFG[13].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM4 SPI PB10 Arduino PIN23
PORT->Group[PORTA].PMUX[5].bit.PMUXE = 0x3; //SERCOM 4 is selected for peripheral use of this pad (0x3 selects peripheral function D: SERCOM-ALT)
PORT->Group[PORTA].PINCFG[12].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM4 SPI PB11 Arduino PIN24
PORT->Group[PORTA].PMUX[5].bit.PMUXO = 0x3; //SERCOM 4 is selected for peripheral use of this pad (0x3 selects peripheral function D: SERCOM-ALT)

Furthermore, I am used to the ATMEGA328 chip. I have established the SPI communication before, but I've never done this on the ATSAMD21 chip. Do you know how to send and receive data from/to the ATSAMD21?

Thanks in advance.

Kind regards,

Cethaka

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