Lecture 07 more about pic
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The PIC 18 microcontroller has two to five timers that can be used as timers to generate time delays or counters to count external events. The document discusses Timer 0 and Timer 1, how they work in C code, and interrupt programming which allows writing interrupt service routines to handle interrupts in a round-robin fashion through the interrupt vector table and INTCON register.
Lecture 07 more about pic
- 2. Timer 0 • The PIC 18 has two to five timers (depends on family) • They can be used as • Timer to generate time delay • Counters count event happening outside the microcontroller.
- 3. Timer 0
- 4. Timer 0
- 5. Timer 0
- 6. Timer 0
- 7. Timer 0
- 8. Timer 0
- 9. Timer 0
- 10. Timer 1
- 11. Timer 1
- 12. Timer 1
- 13. Timer 0 and 1 in C
- 14. Timer 0 and 1 in C
- 15. Timer 0 and 1 in C
- 16. Interrupt Programming • Interrupt • The program associated with interrupt is called the interrupt service routine (ISR) or interrupt handler. • Polling • The microcontroller continuously monitors the status of a given device. • Round-robin fashion (no priorities).
- 17. Interrupt service routine • Upon activation of an interrupt,
- 18. Interrupt vector table (PIC18)
- 19. Simplified view of interrupts
- 20. INTCON (interrupt control) register
- 21. Summary