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Chapter 11 INTERRUPTS PROGRAMMING

Chapter 11 INTERRUPTS PROGRAMMING. Outlines. Contrast and compare interrupts versus polling Explain the purpose of the ISR List the 6 interrupts of the 8051 Explain the purpose of the interrupt vector table Enable or disable 8051 interrupts Program the 8051 timers using interrupts

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Chapter 11 INTERRUPTS PROGRAMMING

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  1. Chapter 11INTERRUPTS PROGRAMMING Microcomputers and Microprocessors

  2. Outlines • Contrast and compare interrupts versus polling • Explain the purpose of the ISR • List the 6 interrupts of the 8051 • Explain the purpose of the interrupt vector table • Enable or disable 8051 interrupts • Program the 8051 timers using interrupts • Describe the two external hardware interrupts of the 8051

  3. Contrast edge-triggered with level-triggered interrupts • Program the 8051 for interrupt-based serial communication • Define the interrupt priority of the 8051

  4. Six interrupts in the 8051

  5. Step in enabling an interrupt

  6. PROGRAMMING TIMER INTERRUPTS

  7. Roll-over timer flag and interrupt JNB TF, target

  8. Programming external hardware interrupts

  9. Sampling the low level-triggered interrupt

  10. Edge-triggered interrupts

  11. Sampling the edge-triggered interrupt

  12. RI and TI flags and interrupts

  13. Use of serial COM in the 8051

  14. Clearing RI and TI before the RETI instruction CLR TI ; CLR RI

  15. Interrupt priority upon reset

  16. Setting interrupt priority with the IP register

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