#BEAGLE DRIVER HOW TO#
#BEAGLE DRIVER DRIVER#

When a process performs a system call, a software interrupt is sent to the kernel, which turns on privileged mode so that the process can run in kernel space. User space code runs with lower priority. Some of these are read, write, open, close, mmap, and so on. The only way for a user app to run in the kernel space is through system calls. In user mode, the CPU can only access memory tagged with user space access rights. You may consider it a sandbox or a jail, so that a user program can't mess with memory or any other resource owned by another program. User space: This is a set of addresses (locations) where normal programs (such as gedit and so on) are restricted to run in. In kernel mode, the CPU can access the whole memory (both kernel space and user space). On the other hand, the kernel can access the whole system memory, since it runs with the higher priority on the system. Kernel memory (or kernel space) is a memory range, owned by the kernel, protected by access flags, preventing any user apps from messing with the kernel (un)knowingly. Kernel space: This is a set of addresses where the kernel is hosted and where it runs.

Network device drivers: network devices (ethernet, wifi, bluetooth.).

Block device drivers: storage devices (mmc, eeproom, flash, harddisk.).

Character device drivers: character devices (RTC, keyboard, sensor.).

There are three types of device drivers:.

#BEAGLE DRIVER HOW TO#

Without the device driver, the OS/Application will not have a clear picture of how to deal with a device.

#BEAGLE DRIVER DRIVER#

When the device driver code is loaded into the operating system such as Linux, it exposes interfaces to the user-space so that the user application can communicate with the device.

The device driver code knows, how to configure the device, sending data to the device, and it knows how to process requests which originate from the device.

Device driver is a piece of code that configures and manages a device.Linux Device Driver Using BeagleBone Black 1.

Beagle driver