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products:sbc:common:applications:gpio:i2c [2022/07/14 10:09] nick |
products:sbc:common:applications:gpio:i2c [2023/11/07 04:51] (current) nick [Enable I2C] |
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===== Introduction ===== | ===== Introduction ===== | ||
- | This document mainly | + | This page introduces the usage of I2C bus on [[products: |
===== I2C Information ===== | ===== I2C Information ===== | ||
- | | | + | | |
- | ^ VIM1/ | + | ^ VIM1/ |
- | | ::: | + | | ::: | ::: | 23(SDA) |
- | | ::: | + | | ::: |
- | | ::: | + | | ::: | ::: | 26(SDA) |
- | ^ VIM3/ | + | ^ VIM3/ |
- | | ::: | + | | ::: | ::: | 23(SDA) |
- | | ::: | + | | ::: |
- | | ::: | + | | ::: | ::: | 26(SDA) |
- | ^ VIM4 | + | ^ VIM4 |
- | | ::: | + | | ::: | ::: | 23(SDA) |
- | | ::: | + | | ::: |
- | | ::: | + | | ::: | ::: | 26(SDA) |
+ | ^ VIM1S | I2CM B | 22(SCL) | ||
+ | | ::: | ::: | 23(SDA) | ||
+ | | ::: | ||
+ | | ::: | ::: | 26(SDA) | ||
===== Enable I2C ===== | ===== Enable I2C ===== | ||
Line 41: | Line 45: | ||
/dev/i2c-3 | /dev/i2c-3 | ||
``` | ``` | ||
+ | |||
+ | <tabbox VIM3 with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. To enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=i2c3 | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the I2C device node. | ||
+ | |||
+ | <tabbox VIM3L with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. To enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=i2c3 | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the I2C device node. | ||
<tabbox VIM4> | <tabbox VIM4> | ||
Line 47: | Line 79: | ||
- | e.g. Enable | + | e.g. To enable |
```shell | ```shell | ||
Line 59: | Line 91: | ||
$ ls /dev/i2c-0 | $ ls /dev/i2c-0 | ||
/dev/i2c-0 | /dev/i2c-0 | ||
+ | ``` | ||
+ | |||
+ | <tabbox VIM1S> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. To enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=i2cm_e | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the I2C device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls /dev/i2c-4 | ||
+ | /dev/i2c-4 | ||
``` | ``` | ||
</ | </ | ||
+ | |||
+ | ===== I2C Usage ===== | ||
+ | |||
+ | Please check the [[https:// | ||
===== Disable I2C to Use GPIO ===== | ===== Disable I2C to Use GPIO ===== | ||
- | If you want to use normal GPIO instead of I2C, you can remove the I2C node in device tree overlays configration file. | + | If you want to use normal GPIO instead of I2C, you can remove the I2C node in [[products: |