Difference between revisions of "7 Segment"

Revision as of 15:11, 16 November 2012

The 7_segment board (depicted: the SPI version)

This is the documentation page for the 7_segment boards.

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 == 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.
-{| border=1
-! port !! function
-|-
-| 0xf0 || change address.
-|}
-=== read ports ===
-The pushbutton board supports several read ports:
-{| border=1
-! 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
-|}
 == Default operation ==