Pushbutton

The pushbutton board (depicted: the SPI version)

This is the documentation page for .

The software

Reading the pushbuttons is very much like the DIO module. The read and write ports are described below.

write ports

Some ports just set a single value. So writing more than one byte to such a port is redundant. Other ports are logically a stream of bytes. So writing more than one byte is encouraged.

The pushbutton board defines just one port.

port	function
0xf0	change address.

read ports

The pushbutton board supports several read ports:

port	function
0x01	identification string. (terminated with 0).
0x02	read eeprom (serial number).
0x20	read button 1
0x21	read button 2
0x22	read button 3
0x23	read button 4
0x24	read button 5
0x25	read button 6
0x30	reports which buttons have been pushed since last read of this register

Changelog

• Initial public release