PiFace Digital 2 – I/O udvidelse
Piface ia designed for Raspberry Pi, but it can be used to other processor-cards like Arduino as-well.
The interface is SPI, see the table below "Raspberry pins used by Piface module" for details
This example is in language C++. You can see some Python examples in the Gettings started document. Install wiringpi
Pins on the PiFace are 200 through 207 for both reading and writing, with pins 208 through 215 reading the state of the output latch register (ie. you can read the state of the output pins)
Outputs:
| Input | Address | Notes |
|---|---|---|
| 0 | 200 | Relay-0 |
| 1 | 201 | Relay-1 |
| 2 | 202 | |
| 3 | 203 | |
| 4 | 204 | |
| 5 | 205 | |
| 6 | 206 | |
| 7 | 207 |
Output latch register :
| Input | Address | Notes |
|---|---|---|
| 0 | 208 | Relay-0 |
| 1 | 209 | Relay-1 |
| 2 | 210 | |
| 3 | 211 | |
| 4 | 212 | |
| 5 | 213 | |
| 6 | 214 | |
| 7 | 215 |
Inputs:
| Input | Address | Notes |
|---|---|---|
| 0 | 200 | S0 |
| 1 | 201 | S1 |
| 2 | 202 | S2 |
| 3 | 203 | S3 |
| 4 | 204 | |
| 5 | 205 | |
| 6 | 206 | |
| 7 | 207 |
Hardware
Download Getting started document
Download MCP23S1 datablad
Køb Piface
Jumpers
Pinout:
Raspberry pins used by piface module
| Signal | Rapberry Ben | Raspberry GPIO | Beskrivelse |
|---|---|---|---|
| VCC | 2 | NA | 5V supply |
| GND | 6 | NA | GND |
| CE0 | 24 | 10 | Chip select |
| MOSI | 19 | 12 | Master out slave in |
| MISO | 21 | 13 | Master in slave out |
| SCLK | 23 | 14 | Clock |