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Author Archives: Sumit

Serial port start bit and stop bit transmission

As RS-232 protocol says , frame consists of start , data , parity and stop bit , How Transmitter Transmits and Reciever  recieves start , stop and parity bit if 8 bit data is sent from transmitter to reciever , … Continue reading

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Doubt with LCR Register

I am unable to understand , how to use stick parity and set break bit of LCR Register ? How parity error bit of LSR of Reciever machine will check the parity of data , sent by Transmitter device ,

Posted in Serial Port Driver | 1 Comment

Touchpad driver

Sir , I want to know which touchpad driver has been there in my laptop , is it a generic driver which has been used for different laptops ?

Posted in Character Driver | 1 Comment

ioctl capability implementations

Wants to add ability to load and remove kernel module from user space in user mode , to check whether application have permissions or not for load and remove kernel modules macro CAP_SYS_MODULE is used (if(!capable(CAP_SYS_MODULE)) , if this is … Continue reading

Posted in Character Driver | 1 Comment