Make it Fit in 1kB

A project log for Mechatronic Ears

Wearable cat ears that move

dehipude Éhipu 11/25/2016 at 15:281 Comment

I just submitted this project to the 1kB challenge too, because I realized that if I only replace the pinMode calls with a suitable DDRB command, I can get it small enough!

Sketch uses 888 bytes (10%) of program storage space. Maximum is 8,192 bytes.
Global variables use 119 bytes (23%) of dynamic memory, leaving 393 bytes for local variables. Maximum is 512 bytes.

You only need to change the setup() function:

void setup() {
    DDRB = 1<<0 | 1<<1;

    // Setup the PWM clock to ~62.5Hz for the servos.
    TCCR0A = 2<<COM0A0 | 2<<COM0B0 | 3<<WGM00;
    TCCR0B = 0<<WGM02 | 1<<CS00 | 1<<CS01 | 0<<CS02;

    OCR0A = 0;
    OCR0B = 0;


danjovic wrote 11/25/2016 at 19:39 point

Cool! I often write to registers to configure AVR peripherals with the exception of the serial port.

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