Explore HIDAPI callback function

[JakubAndrysek]

Try to implement a callback read using a low-level function from the HIDAPI library - read_callback

• https://askubuntu.com/questions/1447628/how-to-implement-generic-hid-read-with-libusb-interrupt-callback

This function has to be additionally implemented to a python HID wrapper like easyhid

The parent project pyspacenavigator, which supports only the Windows platform uses a callback function to the smooth read

• dev.set_raw_data_handler(lambda x: new_device.process(x))

[JakubAndrysek]

Something like this

import hidapi

def my_callback(device, data, length):
    print(f"Received {length} bytes of data: {data}")

# Open a HID device
handle = hidapi.hid_open_path(vendor_id=0x1234, product_id=0x5678, path="/dev/hidraw0")
if handle is None:
    print("Failed to open HID device")
else:
    # Register the callback function
    hidapi.hid_set_callback(handle, my_callback)

    # Write data to the device
    data = [0x01, 0x02, 0x03]
    num_bytes_written = hidapi.hid_write(handle, data, len(data))
    print(f"Wrote {num_bytes_written} bytes of data")

    # Read data from the device
    data = hidapi.hid_read(handle, 64)
    if data is None:
        print("Failed to read data from HID device")
    else:
        print(f"Read {len(data)} bytes of data: {data}")

    # Close the HID device
    hidapi.hid_close(handle)