The board:
_____________________________________ | _______ _______ | | |_______| |_______| | | | | o o o o o | | 11 12 13 14 15 | | | | o o o o o | | 6 7 8 9 10 | | | | o o o o o | | 1 2 3 4 5 | |_____________________________________|
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Left display is a 2x16 LCD
For configuration purpose
This display is connected throught an I2C expander chip.
The prototype is using a snootlab deuligne for now.
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Right display is a 1x8 14digit Led display.
For patch name display / Tuner display
This display is connected with 3 GPIO in a Synchronous serial mode.
http://www.embeddedadventures.com/14_segment_led_display_DSP-0801-BLUE.html
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Buttons
Arranged in a 3x15 matrix and uses Keypad library.
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One Led per button.
Connected throuh 74HC595 shift registers.
Use same SCLK / SDATA as the 14 digit led display with a second latch gpio.