CommandMode

CommandMode is a rewrite of the standard command-mode firmware provided for Rainbowduino 2.0. It works only with Rainbowduino 2.0.

CommandMode3 is similar firmware for Rainbowduino 3.0. It works only with Rainbowduino 3.0. CommandMode3 and original CommandMode use the same command format and are compatible with each other.

Commands have the following format:

Byte	Description
52	the header, an ASCII 'R'
cc	the command number
sr	the column number; the red channel
gb	the green channel; the blue channel
ii	the image number, ASCII value, or row number

The following commands are supported:

Byte Format	Command Name	Description
52 01 s0 00 ii	SHOW_IMAGE	Displays a hard-coded image.
52 02 sr gb ii	SHOW_CHARACTER	Displays an 8x8 ASCII character.
52 03 0r gb 00	SHOW_COLOR	Displays a solid color.
52 04 sr gb ii	SHOW_PIXEL	Sets an individual pixel on the display.

CommandMode and CommandMode3 have all the same restrictions the standard firmware provided for Rainbowduino 2.0 had: only five built-in images, only letters and digits, and only the commands listed above. The only extra is the SHOW_PIXEL command, as it is a common modification, and the Rainbowduino is close to useless without it.