test_SPI_CLS-ALS.py

from WF_SDK import device, supplies, error     # import instruments
from WF_SDK.protocol import spi                # import protocol instrument

from time import sleep          # needed for delays

"""-----------------------------------------------------------------------"""

try:
    # connect to the device
    device_data = device.open()

    """-----------------------------------"""

    # define chip select lines
    CLS_cs = 0
    ALS_cs = 1

    # start the power supplies
    supplies_data = supplies.data()
    supplies_data.master_state = True
    supplies_data.state = True
    supplies_data.voltage = 3.3
    supplies.switch(device_data, supplies_data)

    # initialize the spi interface on DIO0, DIO1, DIO2, DIO3 and DIO4
    spi.open(device_data, CLS_cs, sck=2, miso=3, mosi=4)
    spi.open(device_data, ALS_cs, sck=2, miso=3, mosi=4)

    try:
        # repeat
        while True:
            # clear the screen and home cursor
            spi.write(device_data, "\x1b[j", CLS_cs)

            # display a message
            spi.write(device_data, "Lum: ", CLS_cs)

            # read the temperature
            message = spi.read(device_data, 2, ALS_cs)
            value = ((int(message[0]) << 3) | (int(message[1]) >> 4)) / 1.27

            # display the temperature
            spi.write(device_data, str(round(value, 2)), CLS_cs)

            # display a message
            spi.write(device_data, "%", CLS_cs)

            # delay 1s
            sleep(1)

    except KeyboardInterrupt:
        # exit on Ctrl+C
        pass

    # reset the interface
    spi.close(device_data)

    # stop and reset the power supplies
    supplies_data.master_state = False
    supplies.switch(device_data, supplies_data)
    supplies.close(device_data)

    """-----------------------------------"""

    # close the connection
    device.close(device_data)

except error as e:
    print(e)
    # close the connection
    device.close(device.data)