[SOLVED] PIC16F877A Question - port reading from another port

Will it be possible for the ports to read the output of another ports?

Like for example, there's a connection between porta.f0 and portb.f0 and between those connections, there's a switch. So if the switch is toggled(ON), and send a data/value of 1 toporta.f0, the portb.f0 will then read the 1 value, but if the switch is off or not toggled, the portb.f0 will not be able to read the 1 value and instead, read it as 0.. is that possible? i've tried combinations of connections in proteus but to no avail. If switch is toggled, portb.f0 is not receiving a value of 1 and instead its just either blue or gray color in proteus which is i believe is 0. Sorry for my grammar, still a newbie as well in microc pic programming. Thanks in advance. Any simple circuit provided is appreciated. Thanks

Yes, it is perfectly feasible, and even too much usual, although on above example is not so usual.
This principle is commonly used on keypad scan routines.



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Is true that it might not work on the proteus but 100% work on actual/breadboarding? One of my friends told me that it's possible, that the proteus needs "buffer" but on breadboard is not needed. I don't know whats buffer. Can anyone provide liek a simple circuit how would that work? Below is the link- screenshot of my work on proteus. This is not yet finished and still doing trial and error. Thanks.