User Manual

ManualsBrandsRaspberry Pi ManualsDevelopment Boards & KitsGPIO-Expansion board

Contents

Gertboard Overview ................................................................................................................................ 5

Labels and Diagrams ........................................................................................................................... 7

Power on the Gertboard ...................................................................................................................... 9

GPIO Pins ......................................................................................................................................... 10

Schematics ........................................................................................................................................ 11

Test Programs Overview ....................................................................................................................... 11

C Code Overview .............................................................................................................................. 11

Macros........................................................................................................................................... 12

Python Code Overview ..................................................................................................................... 13

Downloading the Software............................................................................................................ 13

Why Different Program Versions? ............................................................................................... 14

Buffered I/O, LEDs, and Pushbuttons .................................................................................................. 14

Pushbuttons ....................................................................................................................................... 15

Locating the I/O Ports on the Gertboard ........................................................................................... 16

Testing the Pushbuttons .................................................................................................................... 17

Buttons Test in C .......................................................................................................................... 19

Buttons Test in Python .................................................................................................................. 19

Testing the LEDs .............................................................................................................................. 20

LEDs Test in C .............................................................................................................................. 21

LEDs Test in Python ..................................................................................................................... 22

Testing I/O ........................................................................................................................................ 23

Butled Test in C ............................................................................................................................ 24

Butled Test in Python .................................................................................................................... 24

Open Collector Driver ........................................................................................................................... 24

Testing the Open Collector Drivers .................................................................................................. 25

Open Collector Test in C .............................................................................................................. 26

Open Collector Test in Python ...................................................................................................... 26

Motor Controller ................................................................................................................................... 27

Testing the Motor Controller ............................................................................................................ 28

Motor Test in C ............................................................................................................................. 29

Motor Tests in Python ................................................................................................................... 30

Digital to Analogue and Analogue to Digital Converters ..................................................................... 32

Digital to Analogue Converter .......................................................................................................... 32

Analogue to Digital Converter .......................................................................................................... 33

Testing the D/A and A/D .................................................................................................................. 33