run_5503.py stuck on the second mcu_switch_to_fdt_up

[wanywhn]

UPDATE:
driver should work and can capture&generate correct image, but it seems always mismatch when verify.

hi, i have a 27c6:5503 device.
i run with run_5503.py and stuck on mcu_switch_to_fdt_up like bellow( and ctrl + c can't stop the program)

Please remove your finger from the sensor mcu_switch_to_fdt_up(b'\x0e\x01\x8b\x00\x84\x00\x8c\x00\x88\x00\x80\x95\x80\x89\x80\x99\x80\x8a\x80\x8d\x80\x8d') mcu_switch_to_fdt_up(b'\x0e\x01\x8b\x00\x84\x00\x8c\x00\x88\x00\x80\x9b\x80\x8e\x80\xa2\x80\x90\x80\x9f\x80\xa8')

but i can see fingerprint-0.pgm and clear-*.pmg generate ok, it show my fingerprint.

i try to comment mcu_switch_to_fdt_up(b'\x0e\x01\x8b\x00\x84\x00\x8c\x00\x88\x00\x80\x9b\x80\x8e\x80\xa2\x80\x90\x80\x9f\x80\xa8') and it seems work fine and exit normally as bellow
Please remove your finger from the sensor mcu_switch_to_fdt_up(b'\x0e\x01\x8b\x00\x84\x00\x8c\x00\x88\x00\x80\x95\x80\x89\x80\x99\x80\x8a\x80\x8d\x80\x8d') mcu_switch_to_fdt_down(b'\x0c\x01\x8b\x00\x84\x00\x8c\x00\x88\x00\x80\xba\x80\xaf\x80\xba\x80\xb0\x80\xb6\x80\xab', False) query_mcu_state(b'\x01\x002', True)

so
what does the second mcu_switch_to_fdt_up which send byte ending with \x80\xa8 mean?
is this nessary?
and since it works fine ,whta the next step should i do to let the fprintd work(use) with this divece?

thinks for the great works!