Some old AVR projects
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Ondřej Hruška 868f28bff1 Added the projects 10 years ago
..
README.txt Added the projects 10 years ago
butt.h Added the projects 10 years ago
getbytes.py Added the projects 10 years ago
globus.h Added the projects 10 years ago
logo16.h Added the projects 10 years ago
logo16.xcf Added the projects 10 years ago
logo32.h Added the projects 10 years ago
logo32.xcf Added the projects 10 years ago
pig.h Added the projects 10 years ago
pig16.h Added the projects 10 years ago
pig16.xcf Added the projects 10 years ago
snowflake.h Added the projects 10 years ago
snowflake.xcf Added the projects 10 years ago

README.txt

How to generate image header file
=================================

(intended for Linux - dunno how it works in Windoze)


1. Draw image in Gimp, with height a multiple of 8 (8, 16, 32... - how many
LEDs you have)

2. Set collor mode to indexed (black & white) - and make sure WHITE is where
you want your leds to light up, black where you want dark.

3. Export as C header file (eg. snowflake.h)


Now use the getbytes.py script to transform it:

$ python3 getbytes.py snowflake.h

#define ROWS 2
#define COLS 15

const uint8_t image[COLS][ROWS] PROGMEM = {
{ 0b00000001, 0b11000000 }, // ███
{ 0b00010000, 0b10000100 }, // █ █ █
{ 0b00111000, 0b10001110 }, // ███ █ ███
{ 0b00011101, 0b11001100 }, // ███ ███ ██
{ 0b00001100, 0b10011000 }, // ██ █ ██
{ 0b00000010, 0b10100000 }, // █ █ █
{ 0b01001001, 0b11001001 }, // █ █ ███ █ █
{ 0b11111111, 0b11111111 }, //████████████████
{ 0b01001001, 0b11001001 }, // █ █ ███ █ █
{ 0b00000010, 0b10100000 }, // █ █ █
{ 0b00001100, 0b10010000 }, // ██ █ █
{ 0b00011001, 0b11011100 }, // ██ ███ ███
{ 0b00111000, 0b10001110 }, // ███ █ ███
{ 0b00010000, 0b10000100 }, // █ █ █
{ 0b00000001, 0b11000000 }, // ███
};

That will show you the transformed header file.

To store it:

$ python3 getbytes.py snowflake.h > ../image_snowflake.h

Now, in your main.c file, just include it (remove the old image import).