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products:sbc:common:applications:gpio:1wire [2022/07/12 03:07] nick |
products:sbc:common:applications:gpio:1wire [2023/11/07 04:59] (current) nick old revision restored (2023/11/07 04:42) |
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===== Introduction ===== | ===== Introduction ===== | ||
- | This document will explain how to use 1-Wire bus on Khadas SBC. You will learn how to turn it on and how to get sensor data through 1-Wire bus. | + | This page introduces the usage of 1-Wire bus on [[products: |
- | ===== Enable | + | ===== 1-Wire |
- | You can enable | + | You can find the default PIN used for '' |
+ | |||
+ | | | ||
+ | ^ VIM1/ | ||
+ | ^ VIM3/ | ||
+ | ^ VIM4 | ||
+ | ^ VIM1S | 36 | ||
+ | ^ Edge1 | 30 | ||
+ | | | ||
+ | |||
+ | ===== Enable 1-Wire Bus ===== | ||
+ | |||
+ | In order to use the 1-Wire, you need to enable the '' | ||
<tabbox VIM1/ | <tabbox VIM1/ | ||
- | Edit ''/ | + | Edit ''/ |
+ | |||
+ | Take VIM3 as an example to enable '' | ||
- | e.g. | ||
```shell | ```shell | ||
- | overlays=uart4 pwm_ao_a pwm_f i2c0 onewire | + | overlays=onewire |
``` | ``` | ||
+ | <tabbox VIM3 with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. To enable onewire, you need to add '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=onewire | ||
+ | |||
+ | ``` | ||
+ | |||
+ | <tabbox VIM3L with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. To enable onewire, you need to add '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=onewire | ||
+ | |||
+ | ``` | ||
+ | |||
<tabbox VIM4> | <tabbox VIM4> | ||
- | Edit ''/ | + | Edit ''/ |
- | e.g. | + | |
+ | e.g. To enable onewire, you need to add '' | ||
```shell | ```shell | ||
Line 27: | Line 65: | ||
``` | ``` | ||
+ | <tabbox VIM1S> | ||
- | </tabbox> | + | Edit '' |
- | Reboot to effect. | ||
- | < | + | e.g. To enable onewire, you need to add '' |
- | For details on overlays, please refer to [[products: | + | |
+ | ```shell | ||
+ | fdt_overlays=onewire | ||
+ | |||
+ | ``` | ||
+ | </ | ||
+ | |||
+ | < | ||
+ | Reboot the system for this change | ||
</ | </ | ||
- | ===== Get sensor data ===== | + | |
+ | ===== Get Sensor Data ===== | ||
Here we attach a 1-Wire device '' | Here we attach a 1-Wire device '' | ||
Line 61: | Line 108: | ||
``` | ``` | ||
- | Physical pins of 1-Wire | + | |
- | <tabbox VIM1> | + | ===== Disable |
- | '' | + | |
- | <tabbox VIM2> | + | If you want to use normal GPIO instead of 1-Wire, you can remove the 1-Wire node in [[products: |
- | '' | + | |
- | <tabbox VIM3/3L> | + | |
- | '' | + | |
- | <tabbox Edge1> | + | |
- | '' | + | |
- | <tabbox VIM4> | + | |
- | '' | + | |
- | </ | + |