test_I2C_CLS-TMP2.py

from WF_SDK import device, supplies, error, warning     # import instruments
from WF_SDK.protocol import i2c                         # import protocol instrument

from time import sleep          # needed for delays

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

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

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

    # define i2c addresses
    CLS_address = 0x48
    TMP2_address = 0x4B

    # 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)
    sleep(0.1)    # delay

    # initialize the i2c interface on DIO0 and DIO1
    i2c.open(device_data, sda=0, scl=1)

    # initialize the PMOD TMP2 (set output size to 16-bit)
    i2c.write(device_data, [0x03, 0x80], TMP2_address)

    # save custom character
    i2c.write(device_data, "\x1b[7;5;7;0;0;0;0;0;0d", CLS_address)   # define character
    i2c.write(device_data, "\x1b[3p", CLS_address) # load character table

    try:
        # repeat
        while True:
            try:
                # clear the screen and home cursor
                i2c.write(device_data, [0x1B, 0x5B, 0x6A], CLS_address)

                # display a message
                i2c.write(device_data, "Temp: ", CLS_address)

                # read the temperature
                message, error = i2c.read(device_data, 2, TMP2_address)   # read 2 bytes
                value = (int(message[0]) << 8) | int(message[1])    # create integer from received bytes
                if ((value >> 15) & 1) == 0:
                    value /= 128    # decode positive numbers
                else:
                    value = (value - 65535) / 128   # decode negative numbers

                # display the temperature
                i2c.write(device_data, str(round(value, 2)), CLS_address)

                # display a message
                i2c.write(device_data, 0, CLS_address)
                i2c.write(device_data, "C", CLS_address)

                # delay 1s
                sleep(1)
            
            except warning as w:
                print(w)

    except KeyboardInterrupt:
        # exit on Ctrl+C
        pass

    # reset the interface
    i2c.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)

except warning as w:
    print(w)
    # close the connection
    device.close(device.data)