PTN5150A forcing the port as UFP when it become DFP

ptn5150a_test.py

from	machine	import	Pin, I2C, Timer
from	utime	import	sleep
import	machine

ADR				= 0x7A >>1

class PTN5150A:
	def __init__( self, i2c, address = ADR ):
		self.__i2c	= i2c
		self.__addr	= ADR
	
		self.intr	= Pin( 2, Pin.IN )
		self.intr.irq( trigger = Pin.IRQ_FALLING, handler = self.callback )
		self.int_flag	= False
		self.read( 0x03 )	#	read register and clear INT output

	def write( self, r, v ):
		self.__i2c.writeto( self.__addr, bytearray( [ r, v ] ) )
		
	def read( self, r ):
		self.__i2c.writeto( self.__addr, bytearray( [ r ] ) )
		return self.__i2c.readfrom( self.__addr, 1 )[ 0 ]
		
	def show_reg( self, r ):
		print( "reg:0x{:02X} = 0x{:02X}".format( r, self.read( r ) ) )
		
	def show_dump( self ):
		reg_list	= [ 0x01, 0x02, 0x04, 0x09, 0x0A, 0x18 ]
		
		for r in reg_list:
			self.show_reg( r )
					
	def callback( self, pin_obj ):
		self.int_flag	= True
	
	def check_state( self ):
		r	= self.int_flag
		self.int_flag	= False
		
		return r
			
def main():
	i2c	= I2C( 0, sda = Pin( 0 ), scl = Pin( 1 ), freq = 400_000 )
	#print( i2c.scan() )

	cc_logic	= PTN5150A( i2c )

	print( "switch to DRP (as initial state)" )
	cc_logic.write( 0x02, 0x04 )
	cc_logic.write( 0x18, 0x1F )
	sleep( 1 )

	print( "--- TEST START ---" )
	cc_logic.show_dump()

	while True:
		if cc_logic.check_state():
			print( "INT" )		
			cc_logic.show_reg( 0x03 )	#	read register and clear INT output
			status	= cc_logic.read( 0x19 )
			print( "reg:0x{:02X} = 0x{:02X}".format( 0x19, status ) )
			
			if status:
				cc_status	= cc_logic.read( 0x04 )
				print( "reg:0x{:02X} = 0x{:02X}".format( 0x04, cc_status ) )

				msg	= [ "Not Connected", "DFP attached", "UFP attached", "Analog Audio Accessory attached", "Debug Accessory attached", "", "", "" ]
				print( msg[ (cc_status >> 2) & 0x7 ] )
				
				if ( cc_status & 0x1C ) is 0x08:
					print( "********** forcing the port as UFP (act as a device)" )
					cc_logic.write( 0x02, 0x00 )

				if ( cc_status & 0x03 ) is 0x00:
					print( "configure the port as DRP (because cable detach detected)" )
					cc_logic.write( 0x02, 0x04 )
	
main()