From the Forums: A NeoTrellis M4 Color Picker #NeoTrellis #Adafruit

 Trellis M4 Color Picker

From the Adafruit Forums, user jcalvin has written a color picker for the Adafruit NeoTrellis M4.

This editor starts up with the 12 colors from the Adafruit supplied file as colors that can be edited (these colors are read from saved_colors.txt). These 12 colors are displayed in rows 1-3. Choose a color to edit by pressing the button. The selected color blinks.

Row 4 displays the a sample of the color being edited.

Row 5 displays the red, green, and blue components of the color in row 4. If one of the component colors is at minimum value (0), the button will blink dimly with that component color. If one of the component colors is at maximum value (255), it will blink a bright version of that component color.

Row 6 is used to add red, green, blue, or white to the selected color. Holding the button down continues to add the color. Pressing multiple buttons at once works too.

Row 7 is used to subtract red, green, blue, or white from the selected color. Hold and multiple presses works here too.

Row 8 has the following buttons:
Column 1 – set the color being edited to white
Column 2 – set the color being edited to black
Column 3 – types the hex code of the current color to the selected window of the attached computer
Column 4 – save the changes to the selected color in rows 1-3, save also

    • – writes the hex code of the color to the console
              – attempts to write a file “saved_colors.txt” with the new 12 colors (attempts because this doesn’t seem to work while the device is USB mounted)

See the Adafruit Forum post for more info and code.

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