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Hello,
Sorry for the late answer, i was out of my office for one week.
The code is in the attached file, the reading of RC[3..0] is located in Main.
These 2 icons are disable and replaced (for the moment) by the use of others bits.
When I read RC[3..0} and output it on RD[7..0] all these 4 bits are ...

Hello,
when using UART1 pin RC6-RC7 i cannot use RCO to RC3 as I/O input .
Probably something wrong in registers located in "Project Options" --> "Configure" but what?
RCO to RC3 are working fine when UART1 not in use.
Thanks