Hello Guys !

I have an old non-commercial project running on a 16F877 @ 4mhz and a 4x20 lcd.

The project is based on Darrel's interrupts libraries, with the following configuration :

TMR0 as a pulse counter, to calcualte the car´s speed
TMR1 as CCP1 to calculate the fuel consumption
TMR2 as a 500 ms time base.

This arrangement is working good, but I would like to improve it and use the Richard's ST7735 display Lib for a better presentation and, also, read the RPM form the car. So, I think I'd need another Timer/Counter.

I´m planning to keep using the Darrel's interrupts libraries (18F version).

I have some PIC18LF2420 here with me and I was reading its Datasheet.

In the Datasheet's Timers section, they say that TMR3 can not be used as an independent counter, because TMR1 and TMR3 share the same pin T13CKI for their external input.

So, should I search for another device with more timers if I need to read the Car's RPM ?

If yes, is there a suggestion for a new device I should consider ?

Thank you very much.

Sérgio.