Sending commands to a display from a BASIC Stamp using I2C communication. Supported BASIC Stamp: BASIC Stamp 2p models.

BASIC Stamp: BASIC Stamp 2p models
Communication Type: I2C
Display Used: Any Matrix Orbital display that supports I2C such as the MOI or LK/VK/PK series.

In this example we are talking to a display at address 80 Decimal (50 hex) over I2C communication protocol.

Sending a Command to the display:

'{$STAMP BS2p}

I2COUT 1, 80, [254] 'Command Prefix
I2COUT 1, 80, [88] 'Clear screen command

In this example the command to clear the screen is sent to the display. Every command requires a "Command Prefix". In Matrix Orbital displays, that's Hex: FE Decimal: 254 ASCII: 254, you can send these bytes in any format you want, as long as you do it properly. In our example we sent them as DECIMAL...

Setting the Backlight to go off in 2 minute:

'{$STAMP BS2p}

I2COUT 1, 80, [254] 'Command Prefix
I2COUT 1, 80, [66] 'Backlight ON command
I2COUT 1, 80, [2] 'Setting the number of minutes to be on

To permanently turn the backlight on, you would send 0 as the third byte. When the display recieves the command, it will know how many more bytes of information it should get. In th backlight on case, the display knows to expect one more byte of information.

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