Character Device Driver Development

Modules and Projects

in

Embedded Systems Software Engineering

Module 9: Character Device Drive Development:

Abstract:

A character device driver is one that transfers data directly to and from a user process. This is the most common type of device driver and there are plenty of simple examples in the source tree. Character device drivers may transfer data between a user-level process and the device using any scheme other than the system buffer cache. Character drivers control devices such as network cards, terminal devices, printers, and specialized devices such as robots, medical devices, and retail sales devices.

Training Contents for Module 8:Character Device Driver Development

• Introduction to Device Driver Architecture
• Device RegistrationIn and itialization
• Device IO Operations
  • Writing, Reading and Trimming
• Device Operations
  • Seeking
• Device Access and Synchronization
  • Semaphores,
  • Completion,
  • Spinlocks,
  • wait Queues,
  • Blocking IO,
  • Atomic Variables,
  • Bit Manipulators
• IO Control using IOCTL
• IO Prefectchins using Sequential Files
• Software Implemented, Pseudo File System. /proc
• Timing Measurements
  • Delays
  • Timers
  • Tasklets
• Introcduction To Interrupts
• Interrupt Handling
  • IRQs
  • ISRs
  • Top half
  • Bottom Half
• sysfs
• A Complete Device Driver should be Implemented From Scratch

Other Modules in ESSE Training are as follows.

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