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A device driver is a specialized software component (usually considered "system software") which allows a system to interact with a particular type or class of hardware device, such as a keyboard, serial port, disk drive, video display, memory controller, or other peripheral.

2 votes

Processing text messages from a GSM module

Avoid overlapping strings with strncpy() I can't speak to the correctness of your algorithm because I don't know why you need to read the same message up to 4 times. But I did spot something non-sta …
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2 votes

7-segment 4-digit display

Use an array instead of functions Instead of using multiple functions, you can encode your digit segments into a single array. For example: // Define this array at the top of your program. static con …
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4 votes

Callback in Linux kernel driver in order to hide device's low-level protocol

Pass arg instead of lcd Right now, you are passing lcd to your callback function, but the callback function doesn't need lcd. What it needs is the callback argument that you stored in lcd->raw_callb …
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