Difference between revisions of "Arduino"

Latest revision as of 04:29, 24 February 2021

Arduino language reference
analogRead() - analogRead docs
- 0-4095 for 12 bits
- On ATmega based boards (UNO, Nano, Mini, Mega), it takes about 100 microseconds (0.0001 s) to read an analog input, so the maximum reading rate is about 10,000 times a second.
analogWrite() - AnalogWrite docs
analogWriteResolution() - analogWriteResolution docs

Port Manipulation
Use only if:
- You need to turn pins on and off very quickly, meaning within fractions of a microsecond
- You need to set multiple output pins at the same time
- You're running low on program memory
- Otherwise use digitalRead() and digitalWrite() for more readable, portable code.
DDRx - data direction register (r/w)
- You will only see 5 volts on these pins however if the pins have been set as outputs using the DDRx register or with pinMode().
PORTx - data register (r/w)
PINx - Read all of the digital input pins at the same time - read only

@@ Line 1: / Line 1: @@
 == Arduino Language ==
 * [https://www.arduino.cc/reference/en/ Arduino language reference]
 * <code>analogRead()</code> - [https://www.arduino.cc/reference/en/language/functions/analog-io/analogread/ analogRead docs]
@@ Line 6: / Line 7: @@
 * <code>analogWrite()</code> - [https://www.arduino.cc/reference/en/language/functions/analog-io/analogwrite/ AnalogWrite docs]
 * <code>analogWriteResolution()</code> - [https://www.arduino.cc/reference/en/language/functions/zero-due-mkr-family/analogwriteresolution/ analogWriteResolution docs]
+=== Port Registers ===
+* [https://www.arduino.cc/en/Reference/PortManipulation Port Manipulation]
+* Use only if:
+** You need to turn pins on and off very quickly, meaning within fractions of a microsecond
+** You need to set multiple output pins at the same time
+** You're running low on program memory
+** Otherwise use <code>digitalRead()</code> and <code>digitalWrite()</code> for more readable, portable code.
+* DDRx - data direction register (r/w)
+** You will only see 5 volts on these pins however if the pins have been set as outputs using the DDRx register or with <code>pinMode()</code>.
+* PORTx - data register (r/w)
+* PINx - Read all of the digital input pins at the same time - read only
+=== Timer Interrupts ===
+* [https://www.instructables.com/Arduino-Timer-Interrupts/ Arduino Timer Interrupts]
 == Microcontroller concepts ==