3.1 KiB
Inputs & Outputs
The Kumquat has various connectors with different functionalities. This document demonstrates how to use these connectors using gpiod's command-line tools.
Connector Pinout Description
X4 - 2 Relays
This connector features two relays:
| Location | Output Name | Description |
|---|---|---|
| X4.1 | Q12 | Relay 4 (NO) |
| X4.2 | Q12 | Relay 4 (COM) |
| X4.3 | Q11 | Relay 3 (NO) |
| X4.4 | Q11 | Relay 3 (COM) |
X5 - 2 Relays
This connector also features two relays:
| Location | Output Name | Description |
|---|---|---|
| X5.1 | Q10 | Relay 2 (NO) |
| X5.2 | Q10 | Relay 2 (COM) |
| X5.3 | Q9 | Relay 1 (NO) |
| X5.4 | Q9 | Relay 1 (COM) |
X6 - 4 Digital I/Os
This connector provides four Digital I/Os along with one Ground connection. Both input (In) and output (Qn) are available on the same pins:
| Location | Input Name | Output Name | Description |
|---|---|---|---|
| X6.1 | I1 | Q1 | Digital I/O 1 |
| X6.2 | I2 | Q2 | Digital I/O 2 |
| X6.3 | I3 | Q3 | Digital I/O 3 |
| X6.4 | I4 | Q4 | Digital I/O 4 |
| X6.5 | - | - | Ground |
X7 - 4 Digital I/Os
Similar to X6, this connector provides four Digital I/Os along with one Ground (COM) connection. Both input (In) and output (Qn) are available on the same pins:
| Location | Input Name | Output Name | Description |
|---|---|---|---|
| X7.1 | I5 | Q5 | Digital I/O 5 |
| X7.2 | I6 | Q6 | Digital I/O 6 |
| X7.3 | I7 | Q7 | Digital I/O 7 |
| X7.4 | I8 | Q8 | Digital I/O 8 |
| X7.5 | - | - | Ground |
Using gpiod's Command-Line Tools
Controlling Digital I/Os
To control the digital I/Os connected to your board, we'll use gpiod's command-line tools along with gpiofind to dynamically locate the GPIO pins based on the In and Qn names.
For example, to set a Digital I/O pin to a specific value:
gpioset $(gpiofind Q1)=1
This command dynamically locates the GPIO pin associated with Digital I/O 1 (Q1) using gpiofind and then sets its value to high using gpioset.
Similarly, you can set the value of other Digital I/O pins:
gpioset $(gpiofind Q2)=0
This command sets the value of Digital I/O 2 (Q2) to low.
Controlling Relays
To control the relays connected to your board, you can use gpioset in combination with gpiofind.
For example, to turn on Relay 1 (connected to Q9), you can use:
gpioset $(gpiofind Q9)=1
To turn it off:
gpioset $(gpiofind Q9)=0
Reading Digital Inputs
You can also read the state of digital inputs using gpioget.
For example, to monitor the state of Digital Input 1 (connected to I1), you can use:
gpioget $(gpiofind I1)
This command will print the state of the input.