EmbLogic » Sumit https://www.emblogic.com/blog Embedded System and ARM Training Tue, 03 Mar 2020 13:00:06 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.1 Serial port start bit and stop bit transmission https://www.emblogic.com/blog/07/serial-port-start-bit-and-stop-bit-transmission/ https://www.emblogic.com/blog/07/serial-port-start-bit-and-stop-bit-transmission/#comments Tue, 10 Jul 2012 08:46:41 +0000 http://emblogic.org/blog/?p=3854 Continue reading →]]> 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 , as THR containes 8 bits and that should be data .

]]> https://www.emblogic.com/blog/07/serial-port-start-bit-and-stop-bit-transmission/feed/ 0 Doubt with LCR Register https://www.emblogic.com/blog/07/doubt-with-lcr-register/ https://www.emblogic.com/blog/07/doubt-with-lcr-register/#comments Mon, 09 Jul 2012 17:04:55 +0000 http://emblogic.org/blog/?p=3844 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 ,

]]> https://www.emblogic.com/blog/07/doubt-with-lcr-register/feed/ 1 Touchpad driver https://www.emblogic.com/blog/06/touchpad-driver/ https://www.emblogic.com/blog/06/touchpad-driver/#comments Fri, 29 Jun 2012 13:09:49 +0000 http://emblogic.org/blog/?p=3672 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 ?

]]> https://www.emblogic.com/blog/06/touchpad-driver/feed/ 1 ioctl capability implementations https://www.emblogic.com/blog/06/ioctl-capability-implementations/ https://www.emblogic.com/blog/06/ioctl-capability-implementations/#comments Mon, 25 Jun 2012 08:49:43 +0000 http://emblogic.org/blog/?p=3529 Continue reading →]]> 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 true application doesn’t have permissions  ,how to provide these permissions to application ,

All of this has been done in IOCTL.

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