Nope, never try this kind of test
But I double check the related gpio register 0x22158a0 and 0x2215880 which is 0x00000003
which means the pins are all gpio enable and output mode
and register 0x22158b0 and 0x2215890 value will change while the gpioset command trigger
for example: gpioset PF.05 = 1 will trigger 0x22158b0 value to 1 which is as expected. but using multimeter show zero voltage or using oscilloscope show no waveform
I try to use these two pin to simulate I2C signal, but see no wavefrom ( toggle gpio)