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The on-chip timer on PICs is confusing to some. When operating with the instruction cycle clock, it works as a timer. This flag must be cleared in software. This means T0IF would get set every Any writes to this register i.
This means you will have to reset the prescaler back to where you had it every time you write to register TMR0 if you had it set anywhere other than Clearing this bit will select the instruction clock as the TMR0 clock source. Only applies when T0CKI is the clock source. PS2-PS0 — Sets the prescaler rate between — in bit-divisible values. TMR0 setup with the instruction clock as the clock source and a prescaler. TMR0 interrupt setup.
If you use multiple interrupts, you will have to poll all of your interrupt flags to determine which interrupt triggered the interrupt condition, then jump it to the applicable code. Set up the code where it calls the delay loop after which the TMR0 is sampled to see how many pulses were counted during the set delay interval. About the Author Jon Wilder is a freelance electronics engineer and electronics enthusiast for over 20 years.
He spent four years in the US Navy as an aviation electronics technician. Jon built his first vacuum tube amp at age Your email address will not be published. Leave a Reply Cancel reply Your email address will not be published.
Allumage cartographique 2cv aver: PIC 16F628 f 16f84
timer 0 and PIC16F628A
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