Clicking photos through Raspberry Pi Camera Board

mypi = raspi; cam = cameraboard (mypi); ButtonPress= readDigitalPin(mypi,23); if ButtonPress img = snapshot (cam); img = imagesc (img); end

 I want to click photos through raspberry pi with raspberry pi camera board in MATLAB when we press push button. I wrote a MATLAB code for this which is shown in below figure. 

       Even if I connect the digital pins directly to wires still my readDigitalPin shows 0.

       Could you please help me with this?

Answer 1

[Pravarthana P]

Hi Roston Mascarenhas, it can be understood from your query that readDigitalPin() function returns value 0 even after connecting the digital wires. This may be due to the following issues, you may try the listed workaround:

• Check with a switch case to see what happens through the code.
• Check if the pin has been assigned as output pin instead of input pin inorder to read from the pin.

You may find the following documents useful:

Troubleshoot Raspberry Pi GPIO Pins - MATLAB & Simulink (mathworks.com)

Use the Raspberry Pi GPIO Pins as Digital Inputs and Outputs - MATLAB & Simulink (mathworks.com)

Read logical value from GPIO input pin - MATLAB readDigitalPin (mathworks.com)