arduino/ArduinoCore-avr

The Official Arduino AVR core

Stars: 1.5k
Forks: 1.1k
Open beginner issues: 0
Indexed issues: 252

Dominant language: C
License: No license data
Last GitHub push: Jul 1, 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

Open All

252 open issues indexed

Print class to use block write [imported] Open

arduino/ArduinoCore-avr#230 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Timer library for configuration and dynamically allocating (and deallocating) timer interrupt handlers (overflow and compare match) [imported] Open

arduino/ArduinoCore-avr#231 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
millis() fails to increment when interrupts are disabled. [imported] Open

arduino/ArduinoCore-avr#232 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
portRead() and portWrite() commands, if possible. [imported] Open

arduino/ArduinoCore-avr#233 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Access to pin change interrupts. [imported] Open

arduino/ArduinoCore-avr#234 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Wire library doesn't support clock skew. [imported] Open

arduino/ArduinoCore-avr#237 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
condense register initialization in init(). [imported] Open

arduino/ArduinoCore-avr#238 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Add powerEnable() and powerDisable() functions from Wiring. [imported] Open

arduino/ArduinoCore-avr#239 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Enhance HardwareSerial::peek(), add HardwareSerial::remove() [imported] Open

arduino/ArduinoCore-avr#240 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Program doesn't run after Upload Using Programmer with USBasp (Mega2560) Open

arduino/ArduinoCore-avr#246 · 33 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Wire needs high level write_to and read_from methods [imported] Open

arduino/ArduinoCore-avr#241 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
bug in twi.c which effectively disconnects TWI/I²C after an error in Slave Receiver mode [imported] Open

arduino/ArduinoCore-avr#242 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Wire should have ability to not enable internal pull-ups [imported] Open

arduino/ArduinoCore-avr#243 · 4 comments · 1 reaction · 1 assignee · Indexed Sep 14, 2026
attachInterrupt(...) should ignore pending interrupts (clear interrupt flag) [imported] Open

arduino/ArduinoCore-avr#244 · 4 comments · 1 reaction · 1 assignee · Indexed Sep 14, 2026
Add Serial.buffer() and Serial.bufferUntil() functions. [imported] Open

arduino/ArduinoCore-avr#245 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
tone() fails under 31Hz [imported] Open

arduino/ArduinoCore-avr#250 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
optiboot build of atmega8_isp target fails [imported] Open

arduino/ArduinoCore-avr#229 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Abstract Serial base class for HardwareSerial and SoftwareSerial [imported] Open

arduino/ArduinoCore-avr#228 · 3 comments · 6 reactions · 1 assignee · Indexed Sep 14, 2026
Expose noAnalogWrite() function to end PWM output on a pin. [imported] Open

arduino/ArduinoCore-avr#227 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
RX and TX defines for specifying which pins are used for Serial / communication with computer. [imported] Open

arduino/ArduinoCore-avr#225 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Use hardware PWM if generating a single tone() on the right pin for the timer. [imported] Open

arduino/ArduinoCore-avr#224 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
HardwareSerial overflow of input detection [imported] Open

arduino/ArduinoCore-avr#223 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Burning bootloader with AVR dragon using either IDE or Makefiles bricks AVR. [imported] Open

arduino/ArduinoCore-avr#222 · 9 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Make legacy (and new) bootloaders compilable using the IDE-installed tools. [imported] Open

arduino/ArduinoCore-avr#221 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
SPI library examples whould use & explain pre-defined pin constants: MOSI, MISO, SCK, SS [imported] Open

arduino/ArduinoCore-avr#219 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Add elide constructors flag during compilation of .cpp files [imported] Open

arduino/ArduinoCore-avr#257 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
issue in wiring.c for attiny13 in the arduino core. [imported] Open

arduino/ArduinoCore-avr#220 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Add support for more than one SPI bus [imported] Open

arduino/ArduinoCore-avr#216 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
SoftwareSerial support for 7.3mhz based controllers [imported] Open

arduino/ArduinoCore-avr#215 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Add voltageRead() and temperatureRead() [imported] Open

arduino/ArduinoCore-avr#213 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Better error message for "avrdude: stk500_getsync(): not in sync" [imported] Open

arduino/ArduinoCore-avr#211 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Upload fails on some boards with "arduino" programmer type (but works with "stk500v1") [imported] Open

arduino/ArduinoCore-avr#210 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
arduino-usbserial: conflicting CALLBACK_USB_GetDescriptor [imported] Open

arduino/ArduinoCore-avr#209 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Add ability to disable RX or TX when using SoftwareSerial. [imported] Open

arduino/ArduinoCore-avr#208 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Add slave mode support to SPI library [imported] Open

arduino/ArduinoCore-avr#204 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Allow SoftwareSerial to share RX and TX pins. [imported] Open

arduino/ArduinoCore-avr#205 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Better documentation in pins_arduino.h [imported] Open

arduino/ArduinoCore-avr#207 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
tone needs typecast in toggle_count calculation [imported] Open

arduino/ArduinoCore-avr#203 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Sketch with progmem Data >64kb won't run on Mega2560 [imported] Open

arduino/ArduinoCore-avr#201 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Programmer Speed setting is ignored when USB port is used. [imported] Open

arduino/ArduinoCore-avr#202 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Interrupt still enabled after boot loader [imported] Open

arduino/ArduinoCore-avr#218 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Stream::readBytesUntil() only terminates on printable ASCII target bytes Open

bug

arduino/ArduinoCore-avr#249 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
#ifdef by properties, not by chip names: improve support for uncommon chips. Open

arduino/ArduinoCore-avr#197 · 12 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
I2C/TWI/Wire Multi-master Arbitration Fix Open

arduino/ArduinoCore-avr#198 · 6 comments · 2 reactions · 1 assignee · Indexed Sep 14, 2026
EEMEM variable initialization not performed Open

arduino/ArduinoCore-avr#256 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
ARDUINO_MAIN defined on wrong place Open

arduino/ArduinoCore-avr#199 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
MEGA2560 and STK500V2 bootloader - avrdude programming failure when erase command issued. Open

arduino/ArduinoCore-avr#191 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Optimization fix: -freorder-blocks compiler option Open

arduino/ArduinoCore-avr#259 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Caterina leaves UDIEN and UDINT non-zero Open

arduino/ArduinoCore-avr#252 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
AVRISP mkII should use option avrispmkii.communication=serial Open

arduino/ArduinoCore-avr#258 · 1 comment · 1 reaction · 1 assignee · Indexed Sep 14, 2026

A short digest of beginner-friendly GitHub issues.