MyMenu

Features

MyMenu is a self contained menu system with these features:

• 0.96" OLED
• Menu Pushbuttons
  • 5 Way Keypad (Up, Down, Left, Right, Select)
• Direction, Select buttons
• 2-wire I2C (VCC, GND, CLK, DATA) interface
  • Selectable I2C address in range 0x20-0x27 (resistor install option)
  • Interrupt output line on button press
• MCP23008 I2C Port Expander
• OLED connection - mounts OLED to card and shares I2C connection to Host
• 3 LEDs
• 49x49mm card with (4) 4-40 mounting holes

MCP23008 I2C Port Expander

Data Sheet

GPIO Port Map
GP0 - LED D3
GP1 - LED D2
GP2 - LED D1
GP3 - Select button 0 = pressed
GP4 - Right button
GP5 - Down button
GP6 - Up button
GP7 - Left button

OLED Display

• On ebay...
• There are several versions
• MyMenu requires
  • 4-pin I2C version
  • Rev X1-X3 requires pin Ordering VCC, GND,

Rev X3 Connectors

The card has a 5-pin, 0.1" spacing connector. The connector has I2C connections (CLK and DATA) plus an Interrupt line.

1. GND
2. VCC
3. SDA
4. SCL
5. INT

The card has a 4-pin, 0.1" spacing connector for daisy-chaining. The connector has I2C connections (CLK and DATA).

1. GND
2. VCC
3. SDA
4. SCL

Arduino Libraries

• The Display library is decoupled from the MyMenu library and requires a separate install

MyMenu Card Library/Examples

• MyMenu library on GitHub
  • Can download the ZIP file and use the ZIP library installer
• Card requires the Arduino Adafruit MCP23008 library
  • Needs to be installed separately from the MyMenu library
  • MCP23008 is the I2C interface chip that communicates with the buttons and LEDs
  • Tested with Adafruit MCP23008 library version 1.0.1
  • Driver is used to talk to the buttons/LEDs on the MyMenu card
  • Driver can be installed from the Arduino IDE - search "Adafruit MCP23008"
• MyMenu card example code

Display Library - V2 Version

• V3 Version uses Oli Kraus' u8x8 library (part of u8g2 library)
• Oli Kraus' u8g2 OLED library
• Library can be installed through Arduino IDE
• Optional Land Board Menu System Code for OLED Displays - uses u8g2
  • Sketch uses 8,354 bytes (25%) of program storage space. Maximum is 32,256 bytes.
  • Global variables use 780 bytes (38%) of dynamic memory, leaving 1,268 bytes for local variables. Maximum is 2,048 bytes.

Display Library - Older Version (Deprecated)

• Oli Kraus' u8glib OLED library or
• Library can be installed through Arduino IDE
• Optional Land Board Menu System Code for OLED Displays - uses u8glib
• Sketch uses 10,958 bytes (33%) of program storage space. Maximum is 32,256 bytes.
• Global variables use 682 bytes (33%) of dynamic memory, leaving 1,366 bytes for local variables. Maximum is 2,048 bytes.

= Other libraries - Not Recommended for New Designs

• Adafruit OLED library
• Also requires Adafruit-GFX-Library
• Adafruit 0.96" OLED

Driver/Example code

• Github Arduino Driver code
• Github Arduino Example code

Revision History/Checkout Notes

X4 Version Changes

• Same netlist
• Fixes I2C silkscreen issues from X3

X3 Version Changes

• Added a second I2C port for daisy chain of Host I2C
• Changed host I2C pinout to G/V/SDA/SCK
• Silkscreen is wrong
• Board actually matches Sensor Shield SCK/SDA order
• Added selection resistors R10/R11 (Vcc) and R20/R21 (GND) for OLED power/ground pins
• Install 0 Ohm resistors/leave open
• Added silkscreen for MCP23008 address marking 0x2_
• Reordered reference designators for easier assembly

X2 Version Changes

• Moved LEDs to the top of the board
• Created OLED module and moved mtg holes
• Moved keys right

Timing

• Clock on top, data on bottom

• Clock/data relative timing

• Clock rise time

• Clock fall timing

Parts List

• MyMenu Assembly Sheet