M7219 - MAX7219 Control

debug Control Max7219 Segmented LEDs MAX7219_DEBUG

Set the state of one or more Max7219 matrix displays or 7-segment digital displays.

Requires MAX7219_DEBUG.

M7219 [C<column>] [D<row>] [F] [I] [P] [R<row>] [U<index>] [V<bits>] [X<index>] [Y<index>]

`[C<column>]`	Set the column specified by `C` to bit pattern `V`.
`[D<row>]`	Directly set a Max7219 native row (on the unit specified by `U`) to the 8-bit pattern `V`.
`[F]`	Fill the matrix by turning on all LEDs.
`[I]`	Initialize (clear) all matrixes.
`[P]`	Print the LED array state for debugging.
`[R<row>]`	Set the row specified by `R` to bit pattern `V`.
`[U<index>]`	Used with `D` to specify which matrix unit to set.
`[V<bits>]`	Value to apply when using the `C`, `R`, or `X`/`Y` parameters.
`[X<index>]`	Set a matrix LED at the given `X` position to the `V` value. If no `V` is given, toggle the LED state.
`[Y<index>]`	Set a matrix LED at the given `Y` position to the `V` value. If no `V` is given, toggle the LED state.

This single-unit Max7219 with 8x8 Matrix is commonly found online in both assembled and kit form for only a few dollars.

Use the MAX7219_ROTATE and MAX7219_SIDE_BY_SIDE settings that best suit the orientation of your matrix according to this chart.