Local GPIO
| GPI Enable ['GE'] |
| GPI Set ['GI'] |
| GPO Set ['GO'] |
This driver supports a variety of GPIO devices, including:
| 15 Pin Joystick Port |
| USB HID Devices |
| MeasurementComputing GPIO Cards |
Joystick support utilizes the Linux Input Device subsystem. Inputs are active-low, and should be wired as follows:
Table C.2. 15 Pin Joystick Port Wiring
| Pin | Signal |
|---|---|
| 2 | Input 1 |
| 4 | Ground |
| 7 | Input 2 |
| 5 | Ground |
| 10 | Input 3 |
| 12 | Ground |
| 14 | Input 4 |
| 12 | Ground |
In addition, you will need to connect 47 kohm resistors between the following pins: 1-3, 6-8, 9-11 and 13-15. While not strictly needed for the GPI portion of the interface to work, the kernel's analog joystick driver will refuse to initialize the port if these resistors (or a real joystick) are not present.
The device name of the joystick will be one of the
/dev/input/event
devices.
n
NOTE: There have been reports that some port models do not internally connect pin 12 to ground. The symptom of this situation will be that Inputs 1 and 2 work, but not Inputs 3 and 4. If this is the case, connecting the ground for Inputs 3 and 4 to pins 04 or 05 should remedy the problem.
The following MeasurementComputing cards are supported:
| PCI-PDIS08 |
| PCI-PDIS16 |
| PCI-DIO24 |
The device name for the card should be
/dev/gpio.
n
The Measurement Computing PCI-PDIS08 and PCI-PDIS16 boards feature floating, opto-isolated inputs. The inputs are not polarity sensitive and may be driven by either AC or DC. The outputs are electro-mechanical relays with dry contacts.
Table C.3. PCI-PDIS08 and PCI-PDIS16 Connector Pinout (DB37F)
| Pin | Signal |
|---|---|
| 1 | Input 8/16 |
| 20 | Input 8/16 |
| 2 | Input 7/15 |
| 21 | Input 7/15 |
| 3 | Input 6/14 |
| 22 | Input 6/14 |
| 4 | Input 5/13 |
| 23 | Input 5/13 |
| 5 | Input 4/12 |
| 24 | Input 4/12 |
| 6 | Input 3/11 |
| 25 | Input 3/11 |
| 7 | Input 2/10 |
| 26 | Input 2/10 |
| 8 | Input 1/9 |
| 27 | Input 1/9 |
| 9 | Output 8/16 C |
| 28 | Output 8/16 N/O |
| 10 | Output 7/15 C |
| 29 | Output 7/15 N/O |
| 11 | Output 6/14 C |
| 30 | Output 6/14 N/O |
| 12 | Output 5/13 N/C |
| 13 | Output 5/13 N/O |
| 31 | Output 5/13 C |
| 14 | Output 4/12 N/C |
| 32 | Output 4/12 N/O |
| 33 | Output 4/12 C |
| 15 | Output 3/11 N/C |
| 16 | Output 3/11 N/O |
| 34 | Output 3/11 C |
| 17 | Output 2/10 N/C |
| 35 | Output 2/10 N/O |
| 36 | Output 2/10 C |
| 18 | Output 1/9 N/C |
| 19 | Output 1/9 N/O |
| 37 | Output 1/9 C |
The Measurement Computing PCI-DIO24 board features 24 bi-directional, TTL level signal lines, referenced to a common ground. The driver can be configured to use all of the lines as inputs or outputs (mixing inputs and outputs on the same board is not supported). When used as inputs, termination resistor packs should be installed.
Table C.4. PCI-DIO24 Connector Pinout (DB37F)
| Pin | Signal |
|---|---|
| 37 | Input 1 |
| 36 | Input 2 |
| 35 | Input 3 |
| 34 | Input 4 |
| 33 | Input 5 |
| 32 | Input 6 |
| 31 | Input 7 |
| 30 | Input 8 |
| 10 | Input 9 |
| 9 | Input 10 |
| 8 | Input 11 |
| 7 | Input 12 |
| 6 | Input 13 |
| 5 | Input 14 |
| 4 | Input 15 |
| 3 | Input 16 |
| 29 | Input 17 |
| 28 | Input 18 |
| 27 | Input 19 |
| 26 | Input 20 |
| 25 | Input 21 |
| 24 | Input 22 |
| 23 | Input 23 |
| 22 | Input 24 |
| 11 | Ground |
| 13 | Ground |
| 15 | Ground |
| 17 | Ground |
| 19 | Ground |
| 21 | Ground |
| 18 | +5 vdc |
| 20 | +5 vdc |
| 16 | +12 vdc |
| 14 | +-12 vdc |