arduino/ArduinoCore-samd

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Arduino Core for SAMD21 CPU

Stars: 502
Forks: 740
Open beginner issues: 0
Indexed issues: 170

Dominant language: C
License: LGPL-2.1
Last GitHub push: Sep 10, 2026
Latest indexed: Sep 14, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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170 open issues indexed

SERCOM I2C not working on pins PA08, PA09 Open

arduino/ArduinoCore-samd#383 · 15 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
digitalWrite ignored after calling analogWrite on PWM pin Open

bug

arduino/ArduinoCore-samd#385 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Cannot receive the data when data length exactly 64 or 128 bytes Open

bug Component: USB-CDC

arduino/ArduinoCore-samd#391 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Definition digitals pins in variants default Open

waiting for feedback

arduino/ArduinoCore-samd#393 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
SAM D21 on MKR Zero doesn't work with DS3231 RTC Open

arduino/ArduinoCore-samd#396 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
I2C handling out-of-order on PA08/PA09/SERCOM_ALT. Open

arduino/ArduinoCore-samd#398 · 8 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
USB hot-plug doesn't work on MKRZero? Open

arduino/ArduinoCore-samd#409 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Feature request: Add INPUT_PULLDOWN support to pinPeripheral() Open

Component: Core improvement

arduino/ArduinoCore-samd#410 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
I2C bus left in incorrect state when going to sleep Open

waiting for feedback

arduino/ArduinoCore-samd#414 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
arduino zero bootloader can corrupt fuse and corrupt bootloader Open

arduino/ArduinoCore-samd#417 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Keyboard and Mouse not working from 1.8.0 release on Open

arduino/ArduinoCore-samd#423 · 14 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
samd21J18A (Xplained Pro) wrong pin conversion Open

arduino/ArduinoCore-samd#429 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Incompatibility between MKRZERO RTC & I2S libraries Open

arduino/ArduinoCore-samd#451 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
MKR WiFi 1010 - BQ24195L - OTG / 5V boost mode support Open

arduino/ArduinoCore-samd#440 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Unable to #include <memory> - compilation errors within (MKRZero) Open

arduino/ArduinoCore-samd#443 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Firmware shorts IO pin for USB OTG devices? Open

arduino/ArduinoCore-samd#444 · 23 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Incompatibility between LowPowerArduino & ArduinoSound Open

arduino/ArduinoCore-samd#445 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Serial reads missing last byte Open

arduino/ArduinoCore-samd#459 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
micros() is non-monotonic with -1ms glitches on Cortex cores from priority 0 or 1 ISRs Open

arduino/ArduinoCore-samd#463 · 33 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
ADD NANO 33 IoT Support to SDU Open

arduino/ArduinoCore-samd#465 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
arm-none-eabi-gcc / 7-2017q4 precompiled binaries out of date Open

arduino/ArduinoCore-samd#468 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Please add board / proper support for SAMD21 M0-Mini Open

arduino/ArduinoCore-samd#470 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
HardwareSerial/Uart write and flush lock up when interrupts are disabled Open

arduino/ArduinoCore-samd#472 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
SERCOM::startTransmissionWIRE() freezes on hardware issue. Open

arduino/ArduinoCore-samd#476 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
board_driver_i2c.c not visible at runtime Open

arduino/ArduinoCore-samd#477 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
board_driver_i2c.c: hardcoded mask for PM register using SERCOM0 Open

arduino/ArduinoCore-samd#478 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
SDU.h failing to compile with adjusted boot file (SS pin change from 4 to 6) Open

bug

arduino/ArduinoCore-samd#479 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
I2S library: support channel selection Open

arduino/ArduinoCore-samd#480 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
I2S library: Support for 24 Bit samples Open

arduino/ArduinoCore-samd#481 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
USBCore double reset of EP0 bank0 Open

arduino/ArduinoCore-samd#482 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
DAC0 is not defined for MKRZero and MKRWifi1010 Open

arduino/ArduinoCore-samd#488 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Only define Serial ISRs when used Open

arduino/ArduinoCore-samd#489 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
dpinst-amd64.exe is not signed for Windows 10 Open

improvement

arduino/ArduinoCore-samd#496 · 14 comments · 6 reactions · 1 assignee · Indexed Sep 14, 2026
"CRC doesn't match, file is corrupted. It may be a temporary problem, please retry later" Open

arduino/ArduinoCore-samd#502 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
MKR Wifi 1010 incorrect resistor MPN Open

arduino/ArduinoCore-samd#504 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Incorrect default SERCOM notation Open

arduino/ArduinoCore-samd#507 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
How is the SAMD section in https://downloads.arduino.cc/packages/package_index.json being created/where are the sources? Open

arduino/ArduinoCore-samd#510 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
min() and max() definitions cause incompatibilities with standard min() and max() Open

arduino/ArduinoCore-samd#514 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 14, 2026
MKR GSM 1400, MKR 1010 and NB 1500 Power led on with battery source Open

arduino/ArduinoCore-samd#515 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Major performance issue with MKR4000 vidor compared to MKR1000 doing fine Open

arduino/ArduinoCore-samd#518 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
readInternalTemperature(); - why isn't this part of the ArduinoCord-samd ? Open

arduino/ArduinoCore-samd#524 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
What is the purpose of PINCOUNT_fn Open

arduino/ArduinoCore-samd#531 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
External interrupts flags are not cleared before enabling the interrupt Open

arduino/ArduinoCore-samd#532 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Feature Request: allow custom linker scripts Open

arduino/ArduinoCore-samd#536 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
lost Interrupts for Digital Pin and attached ISR function Open

arduino/ArduinoCore-samd#537 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Lost characters in Serial.print with many Interrupts in background Open

arduino/ArduinoCore-samd#538 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
"LITTLE_ENDIAN" redefined Open

arduino/ArduinoCore-samd#540 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 14, 2026
Arduino nano 33 iot binary file Open

arduino/ArduinoCore-samd#543 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Check to see if TwoWire has already begun Open

arduino/ArduinoCore-samd#545 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Tone lower than ~40 Hz doesn't work Open

arduino/ArduinoCore-samd#547 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

arduino/ArduinoCore-samd

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