PIC (PIC16F886) to do a simple frequency counter TMR0 timer with 1s, the test signal input pin from T1CKI with TMR1 count, read TMR1H, TMR1L value is the frequency of the microcontroller: PIC16F886 display: LCD1602 with Proteus simulation.

Frequency\Frequency.as
.........\Frequency.c
.........\Frequency.cof
.........\Frequency.DSN
.........\Frequency.hex
.........\Frequency.hxl
.........\Frequency.lst
.........\Frequency.map
.........\Frequency.mcp
.........\Frequency.mcs
.........\Frequency.mcw
.........\Frequency.obj
.........\Frequency.p1
.........\Frequency.pre
.........\Frequency.PWI
.........\Frequency.rlf
.........\Frequency.sdb
.........\Frequency.sym
.........\funclist
.........\Last Loaded Frequency.DBK
.........\startup.as
.........\startup.lst
.........\startup.obj
.........\startup.rlf
Frequency

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