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Merge pull request #794 from Pairman/patch-1

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[LPi4A / PWM]fix factual errors
This commit is contained in:
Caize Wu
2025-04-15 15:09:16 +08:00
committed by GitHub
parent 20172faf50 1ecf9b9dda
commit 7be82ae080
2 changed files with 19 additions and 7 deletions
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14
docs/hardware/en/lichee/th1520/lpi4a/6_peripheral.md
View File

@@ -71,17 +71,23 @@ Take PWM1 which is connected to the cooling fan as an example, you can get the f
cat /sys/class/hwmon/hwmon0/pwm1
```
The PWM speed value ranges from 0 to 255, where a higher value represents a higher fan speed. You can write ```0``` to the PWM enable control to disable automatic speed regulation, and manually set the fan speed (e.g., 255):
The PWM speed value ranges from 0 to 255, where a higher value represents a higher fan speed. You can write ```1``` to the PWM enable control for manual speed regulation, and set the fan speed (e.g., 255):
```
echo 0 > /sys/class/hwmon/hwmon0/pwm1_enable
echo 0 > /sys/class/hwmon/hwmon0/pwm1
echo 255 > /sys/class/hwmon/hwmon0/pwm1
```
Or you can enable automatic speed regulation with the following code:
You can enable automatic speed regulation with the following code:
```bash
echo 1 > /sys/class/hwmon/hwmon0/pwm1_enable
echo 2 > /sys/class/hwmon/hwmon0/pwm1_enable
```
Or stop the fan completely:
```bash
echo 0 > /sys/class/hwmon/hwmon0/pwm1_enable
```
## GPIO

12
docs/hardware/zh/lichee/th1520/lpi4a/6_peripheral.md
View File

@@ -71,17 +71,23 @@ light-lpi4a-ddr2G.dtb #history dtb
cat /sys/class/hwmon/hwmon0/pwm1
```
风扇的PWM转速值范围在0到255之间，值越大风扇转速越大。你可以向PWM使能写入```0```来关闭自动调速，并手动设置转速（如255）：
风扇的PWM转速值范围在0到255之间，值越大风扇转速越大。你可以向PWM使能写入```1```来启用手动调速，并设置转速（如255）：
```
echo 0 > /sys/class/hwmon/hwmon0/pwm1_enable
echo 0 > /sys/class/hwmon/hwmon0/pwm1
echo 255 > /sys/class/hwmon/hwmon0/pwm1
```
使用以下命令可以恢复自动调速：
```bash
echo 1 > /sys/class/hwmon/hwmon0/pwm1_enable
echo 2 > /sys/class/hwmon/hwmon0/pwm1_enable
```
或是完全禁用风扇：
```bash
echo 0 > /sys/class/hwmon/hwmon0/pwm1_enable
```
## GPIO