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Small improvements #1454

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3a158dc
PWM Fan control small improvement
jcarolinares Oct 30, 2023
4302461
Additional changes
jcarolinares Nov 2, 2023
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13 changes: 10 additions & 3 deletions .../hardware/04.pro/carriers/portenta-hat-carrier/tutorials/user-manual/content.md
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Expand Up @@ -1158,11 +1158,11 @@ Following these steps, you will be able to successfully capture and stream video

### PWM Fan Control

The Portenta Hat Carrier is designed to be a thermal dissipation reference carrier for Portenta X8, including dedicated Pulse Width Modulation (PWM) pins for external fan control. The principle of PWM involves varying the width of the pulses sent to the device, in this case, a fan, to control its speed or position.
The Portenta Hat Carrier is designed to be a thermal dissipation reference carrier for Portenta X8, including dedicated Pulse Width Modulation (PWM) pins for external fan control. The principle of PWM involves varying the width of the pulses sent to the device, in this case a fan, to control its speed or position.

![Portenta Hat Carrier Fan Mount](assets/board_fan_mount.gif)

The fan can be connected via PWM pins available on the Portenta Hat Carrier. The connector has the following structure:
The fan can be connected via the PWM pins available on the Portenta Hat Carrier. The connector has the following structure:

| **Pin number** | **Silkscreen** | **Power Net** | **Portenta HD Standard Pin** | **High-Density Pin** |
|:--------------:|:--------------:|:-------------:|:----------------------------:|:--------------------------------------------------------------------:|
Expand All @@ -1176,6 +1176,13 @@ The fan can be connected via PWM pins available on the Portenta Hat Carrier. The

The fan's speed can be controlled using the following code sequence when you are using the Portenta X8 within the Linux environment.

First, connect to the board and make sure you have root permissions:

```
adb shell
sudo su -
```

Export the PWM channel:

```
Expand Down Expand Up @@ -2342,7 +2349,7 @@ When all conditions are set and in place, use the following script to read all a
import os

if os.environ['CARRIER_NAME'] != "rasptenta":
print("This script requires Portenta HAT carrier")
print("This script requires a Portenta HAT carrier")
exit(1)

import Portenta.GPIO as GPIO
Expand Down