User Tools
products:sbc:common:applications:gpio:40pin-header
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
products:sbc:common:applications:gpio:40pin-header [2022/10/18 03:10] hyphop [Boards reference table vendor kernel] |
products:sbc:common:applications:gpio:40pin-header [2024/08/12 03:08] (current) william [Troubleshooting] |
||
|---|---|---|---|
| Line 3: | Line 3: | ||
| ====== GPIO Header ====== | ====== GPIO Header ====== | ||
| - | Universal GPIO 40 pins board header, used for communication between board and different external devices. | + | ====== GPIO usage examples |
| - | + | ||
| - | + | ||
| - | <WRAP important > | + | |
| - | Current GPIO numbers valid for vendor kernel only. Mainline linux kernel GPIO numbers will be different... | + | |
| - | </ | + | |
| - | + | ||
| - | + | ||
| - | ===== Control | + | |
| <WRAP important > | <WRAP important > | ||
| Line 19: | Line 11: | ||
| When you get the GPIO number, you can follow the steps below to control it. Here we take GPIO number '' | When you get the GPIO number, you can follow the steps below to control it. Here we take GPIO number '' | ||
| - | ==== Export GPIO ==== | + | ===== Export GPIO ===== |
| ```shell | ```shell | ||
| Line 25: | Line 17: | ||
| ``` | ``` | ||
| - | ==== Set-up GPIO direction ==== | + | ===== Set-up GPIO direction |
| We can configure direction as input or output. | We can configure direction as input or output. | ||
| Line 31: | Line 23: | ||
| ```shell | ```shell | ||
| $ echo out | sudo tee / | $ echo out | sudo tee / | ||
| - | $ echo in | sudo tee / | + | $ echo in | sudo tee / |
| ``` | ``` | ||
| - | ==== Set GPIO value ==== | + | ===== Set GPIO value ===== |
| ```shell | ```shell | ||
| Line 41: | Line 33: | ||
| ``` | ``` | ||
| - | ==== Get GPIO value ==== | + | ===== Get GPIO value ===== |
| ```shell | ```shell | ||
| Line 47: | Line 39: | ||
| ``` | ``` | ||
| - | ==== Unexport GPIO ==== | + | ===== Unexport GPIO ===== |
| ```shell | ```shell | ||
| Line 53: | Line 45: | ||
| ``` | ``` | ||
| - | ==== Troubleshooting ==== | + | ===== Troubleshooting |
| If you got the similar error below, it means that the PIN you try to export is used for another function, you need to edit [[products: | If you got the similar error below, it means that the PIN you try to export is used for another function, you need to edit [[products: | ||
| ```shell | ```shell | ||
| - | khadas@Khadas: | + | $ echo 465 | sudo tee / |
| tee: / | tee: / | ||
| ``` | ``` | ||
Last modified: 2022/10/18 03:10 by hyphop