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Arduino Software Development
TODO: what is an .ino file? TODO: how does compilation work
When you do a build (i.e. make) it generates a few lines at the end to tell you the size of the image:
Calculating image size Firmware Size: [Program: 4804 bytes (1.8%)] [Data: 736 bytes (9.0%)] on atmega2560 EEPROM Size: [Program: 0 bytes (0.0%)] [Data: 0 bytes (0.0%)] on atmega2560
You can also get similar numbers from avr-size:
$ avr-size -t ArduinoSerialInput.elf text data bss dec hex filename 4758 46 690 5494 1576 ArduinoSerialInput.elf 4758 46 690 5494 1576 (TOTALS)
Note that 46 + 690 = 736 which is what is reported for the Data section in the build output. Also 46 + 4758 = 4804 which is what is reported for the Program section in the build output.
setup() vs loop()
TODO: what is setup() and what is loop()
TODO: where is main()? TODO: where are the #includes?
TODO: what is delay()? What is a millisecond?
Pins & GPIO
TODO: what is pinMode? what is OUTPUT? TODO: how do I find out what number a pin has? TODO: what is digitalWrite? What is HIGH and LOW?