Running Demo Codes

To run the demo code, perform the following on VisionFive 2 Debian:

Locate to the directory where the test code, edge_detection_with_LED_Matrix.py, exists:
1. Execute the following command to get the directory where VisionFive.gpio exists:
```
pip show VisionFive.gpio
```
  Result:
```
Location: /usr/local/lib64/python3.9/site-packages
```
  Note:
  The actual output depends on how the application is installed.
2. Execute the following to enter the directory, for example, /usr/local/lib64/python3.9/site-packages as indicated in the previous step output:
```
cd /usr/local/lib64/python3.9/site-packages
```
3. Execute the following command to enter the sample-code directory:
```
cd ./VisionFive/sample-code/
```
Under the sample-code directory, execute the following command to execute the demo code:
```
ssudo python  edge_detection_with_LED_Matrix.py
```
Alternatively, you can execute the following command:
```
sudo python3  edge_detection_with_LED_Matrix.py
```
Result:
- The terminal displays as follows:
```
# python3 edge_detection_with_LED_Matrix.py 
*------------------------------------------------------*
Please press the key on pin 37 to launch !!!
```
- After pressing the button according to the prompt, the LED matrix module will countdown from 5 to 1, and finally display the StarFive logo, as shown in the following figure:
  Figure 1. Countdown and StarFive Logo