GPIO Pull up/down Test

This section describes how to use the demo program to test the GPIO pull up and pull down (PUD) function.

Hardware Setup

Make sure pin 31 of the 4--pin header is in a suspended state (not wired).

Run Demo Code

Perform the following steps on Debian of VisionFive 2 or VisionFive 2 Lite.

Locate the directory where the test code, pud_test.py, exists.
1. Source into the Python3 Virtual Environment.
```
source ./myvenv/bin/activate
```
2. Install the dependency.
```
python3 -m pip install pillow
```
3. Get the directory where VisionFive.gpio exists.
```
python3 -m pip show VisionFive.gpio
```
  Note: The output depends on how the application is installed.
4. Enter the VisionFive.gpio directory.
```
cd <VisionFive.gpio directory>
```
5. Enter the sample-code directory.
```
cd ./VisionFive/sample-code/
```

Under the sample-code directory, execute the following command to run the demo code.

sudo python  pud_test.py

Alternatively, you can also run the following command.

sudo python3  pud_test.py

The terminal displays the following:

# python3 pud_test.py
*----------------------Start testing------------------------------*

Step 1: set input to direction of GPIO pin 31.

Step 2: the default input level is HIGH.

Step 3.1: set PUD_DOWN to input direction of GPIO pin 31.

Step 3.2: the input level with pull_down enabled is LOW.

Step 4.1: set PUD_UP to input direction of GPIO pin 31.

Step 4.2: the input level with pull_up enabled is HIGH.

*---------------------------end test------------------------------*

Note: For details about the source code, see edge_detection_with_waiting_time.py Source Code.

(Optional) Exit the Python3 Virtual Environment.
```
deactivate
```