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DIGILENT Pmod SWT

Brian0925
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The Pmod HAT Adapter  (144-8419)  makes it easy to connect Pmods to a Raspberry Pi. It supports plug-and-play functionality, only requiring that the host Raspberry Pi is booted with the Pmod HAT attached. The Pmod HAT has three 2×6 Pmod ports and provides access to additional I/O available via the Raspberry Pi 40-pin GPIO connector. Designed in collaboration with RS Components, users can take advantage of example Python libraries and demo tutorials hosted on DesignSpark.

SWT (164-3480) provides users with 4 slide switches for using with the Pmod HAT Adapter. Four static binary logic inputs could add user input to the host board or project, controlled by a 6-pin Pmod connector with GPIO interface. The Pmod SWT provides four slide switches for up to 16 different binary logic inputs for the attached system board.

Getting Started

To start off, we have to type the following commands on the terminal:

sudo apt-get update

sudo apt-get dist-upgrade

sudo apt-get install -y build-essential git libusb-1.0-0-dev libprotobuf-dev libleveldb-dev libsnappy-dev libopencv-dev libhdf5-serial-dev protobuf-compiler libatlas-base-dev git automake byacc lsb-release cmake libgflags-dev libgoogle-glog-dev liblmdb-dev swig3.0 graphviz libxslt-dev libxml2-dev gfortran python3-dev python3-pip python3-setuptools python3-markdown python3-pillow python3-yaml python3-pygraphviz python3-h5py python3-nose python3-lxml python3-matplotlib python3-numpy python3-protobuf python3-dateutil python3-skimage python3-scipy python3-six python3-networkx libfreetype6-dev libjpeg-dev python3-gst-1.0 python3-picamera

sudo pip3 install pyserial

sudo pip3 install designspark.pmod

Then, we need to turn on the serial function of the Raspberry Pi:

sudo raspi-config

>5 Interfacing Options
>6 serial
>Would you like a login shell to be accessible over serial?
>No
>Would you like the serial port hardware to be enabled?
>Yes

This program code means that we have to insert the Pmod SWT into the Pmod HAT Adapter JAA slot. The JAA slot means the upper 6-pin of slot JA.

if __name__ == '__main__':
    
    SWT = createPmod('SWT','JAA')
    time.sleep(0.1)

Plug the Pmod SWT into the JAA slot labelled below:

try:
        while True:
            print(SWT.GetStatus(1),SWT.GetStatus(2),SWT.GetStatus(3),SWT.GetStatus(4))
            time.sleep(0.5)
    except KeyboardInterrupt:
        pass
    finally:
        SWT.cleanup()

The SWT.GetStatus provides the current switch status.

sudo python3 /home/pi/Desktop/DesignSpark/example/SWT_example.py

or 

sudo python /home/pi/Desktop/DesignSpark/example/SWT_example.py 

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