DIO

The DIO board (depicted: the SPI version)

This is the documentation page for the SPI_DIO and I2C_DIO boards.

Overview

This board enables you to read and write upto 7 digital IO lines. And although the "d" in dio stands for "digital", it now also allows you to configure and use some of the IO lines as analog inputs!

Assembly instructions

None: the board comes fully assembled.

Pinout

For the SPI connector see: SPI_connector_pinout. For the I2C connector see: I2C_connector_pinout.

pin	function	analog?
1	GND
2	VCC
3	IO0	yes
4	IO1	yes
5	IO2	no
6	IO3	yes
7	d.n.c.
8	IO4	yes
9	IO5	no
10	IO6	yes

LEDs

The only LED is a power indicator.

jumper settings

See solder jumpers on how to change the solder jumper.

By changing the solder jumper SJ1, you can make the connector SPI1 (nearest the board edge) into an ICSP programming connector for the attiny44 on the board.

Protocol

For the intro to the SPI and I2C protocols read: SPI versus I2C protocols

The board specific protocol can be found here: DIO_protocol

You should also read the General_SPI_protocol notes.
For arduino, a sample PDE is available, called ardemo_lcd.pde, also at the BitWizard software download directory .

This is a demo to send things using SPI to the lcd board. The SPI routines there are applicable for the DIO, 3FETS and 7FETS boards as well.

Changelog

1.0

• Initial public release