Topics

Here is a list of all topics with brief descriptions:

Digital I/O	PinMode(), digitalWrite(), digitalRead()
Analog I/O	AnalogRead(), analogWrite() (PWM) and their settings, plus averaging, millivolts, differential, several pins at once and fixed-rate bursts on every analog pin
Advanced I/O	Tone(), pulseIn(), shiftOut(), shiftIn()
Time	Millis(), micros(), delay(), delayMicroseconds()
Interrupts	AttachInterrupt(), detachInterrupt(), interrupts(), noInterrupts()
Math	Min(), max(), constrain(), map(), sq() and angle conversions
Random numbers	Random(), randomSeed()
Bits and bytes	Reading and setting bits, splitting and joining bytes
Sketch structure	Setup(), loop() and the start-up order
Multicore	Setup1(), loop1() and rp2040: running code on both RP2040 cores
FreeRTOS	Tools > Operating System > FreeRTOS (SMP): tasks, queues and semaphores on both cores
CMSIS-RTOS2	Tools > Operating System > FreeRTOS (SMP) + CMSIS-RTOS2: ARM's standard RTOS API, on FreeRTOS
Constants and types	Pin levels and modes, bit order, and the Arduino integer types
USB-PD power	Stusb4500: sink profiles, renegotiation and the current contract