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Device Drivers & Interrupts

Device Drivers & Interrupts. By: Prof. Mahendra B. Salunke Asst. Prof., Department of Computer Engg, SITS, Pune-41. Email: msalunke@gmail.com URL: microsig.webs.com. Contents. Device Drivers Device Servicing without using an ISR Device Servicing using an ISR

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Device Drivers & Interrupts

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  1. Device Drivers & Interrupts By: Prof. Mahendra B. Salunke Asst. Prof., Department of Computer Engg, SITS, Pune-41 Email: msalunke@gmail.com URL: microsig.webs.com

  2. Contents • Device Drivers • Device Servicing without using an ISR • Device Servicing using an ISR • Writing Physical Device Driving ISRs • Device drivers in a system • Interrupts • Interrupt servicing mechanism • Context, Latency and Deadline

  3. Device Drivers • Device Servicing without using an ISR • Device Driver using ISR • Writing Physical Device Driving ISRs

  4. Device Servicing without using an ISR

  5. Device Driver using an ISR

  6. Writing Physical Device Driving ISRs • It is important to understand different points before writing device driver

  7. Device drivers in a system • Parallel port device driver • Serial port device driver • Device drivers for internal programmable timing devices

  8. Interrupts • It is a signal to the processor generated by software or hardware, which may lead interruption to current program execution. • Maskable and Non-maskable interrupt • Interrupt Enable bit • Interrupt mask bit • Interrupt flag • Interrupt vector • Interrupt vector table • Interrupt pending regsiter

  9. Interrupt servicing mechanism • Hardware and software related interrupt sources • Software error related hardware interrupts • Software instruction related interrupt sources • Hardware interrupts related to internal devices • Interrupt vector • Classification: Maskable and non-maskable • Interrupt pending register or status register

  10. Context, Latency and Deadline

  11. Happy Learning Contact Details: Email: msalunke@gmail.com URL: microsig.webs.com

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