Firmware is a type of software that is embedded into a device’s hardware and controls its basic operations.
Firmware is the instructions given to a device to allow it to function effectively, interact with other devices, and complete its intended use. Unlike general-purpose software, firmware is usually stored in non-volatile memory and cannot be easily updated or modified.
What Does Firmware Do?
Firmware is essential to device function, and it is responsible for a number of key tasks when using a device.
Controlling the hardware
Firmware helps a device to start up and interact with other devices, as well as performing basic input and output tasks.
Provides low-level control over a device
Firmware handles the basic operations of a device, such as booting and managing hardware resources.
Communication
Firmware also enables components of hardware to communicate with each other effectively and to interact successfully with high-level software.
Allows updates to be performed on a device
Usually embedded, firmware can be updated in order to fix bugs, improve security and add or extend features. Historically the difference was “firm” ware as opposed to “hard” ware.
Why Is Firmware Important?
There are many reasons why firmware is essential to device operations, for example:
Reliable functionality
Firmware helps to ensure that hardware is operating efficiently, reliably, safely and as intended for use.
Essential operations
Firmware allows devices to perform their intended use and interact successfully with other systems and devices.
Security and protection
Firmware updates can help to address security vulnerabilities within a system and help to protect devices from malicious systems.
Types Of Firmware
There are also different kinds of firmware to consider, these are as follows:
High-level firmware
Algorithmic computations might be handled in a higher level language, or use a framework, or be more complicated. High level tends to specify algorithmic requirements rather than low level device functionality.
Low-level firmware
Low-level firmware is considered a vital part of a device’s hardware set up. It will define the interaction between the CPU and its surroundings. This might include a modem driver, for instance.
Sub-system firmware
Sub-systems may be delivered in an undefined state, with the feature set loaded at startup. This is common in embedded Linux and Android products, where a radio feature set is defined by the firmware loaded into it at startup. Until this firmware is loaded, the radio is in a generic state. The firmware loaded into it enables features, like adding security algorithms or line coding.
Examples Of Firmware
Now we know of various types of firmware, here are some examples of how firmware may be used:
BIOS (Basic Input/Output System)
BIOS is a type of firmware that is found in computers. It initiates hardware when the device is turned on.
Printer firmware
Printer firmware aids the interactions between a printer, and its various components such as the ink cartridge or receiving data from another device.
Boot firmware
Smartphones use boot firmware to start up and load the operating system.
Router firmware
Router firmware controls how a router operates, manages network traffic and provides security.
What Are The Key Differences Between Firmware And Software
Firmware is a type of software, but there are clear distinctions between the two:
Firmware is software that provides basic machine instructions that allow the hardware to function and communicate with other software running on a device.
Firmware provides low-level control for the various basic aspects of a specific piece of hardware such as its startup, communication, interaction with the operating system and other hardware devices.
Another key difference between software and firmware is that firmware is not generally designed to be user-friendly because end users don’t interact with it directly. Firmware isn’t updated frequently. Most device manufacturers release firmware updates to address critical issues i.e. related performance or security or to add a new function to a device.
Software is designed for users to interact with on a device and carry out specific tasks with. Software sits above firmware and uses it to communicate with the hardware. Software is much more complex and not as bound to hardware as firmware is.
Software can usually be updated and changed without having to replace other components of the hardware. This isn’t possible with firmware, as it is embedded and has permanent storage within the hardware.
What Is Firmware Security?
Hardware devices are often vulnerable to firmware attacks, which could lead to hackers embedding malware into the firmware. Because a variety of devices share the same code, this allows hackers to exploit common vulnerabilities.
Laptops, for example, are full of firmware that helps to power the hardware such as batteries and webcams. This is a security risk as they could be more vulnerable to firmware hacking.
A lack of firmware security can lead to attackers spying on users’ devices, intercepting online activity or even stealing their data or gaining remote control of the device.
Best Practices For Firmware Security
You can prevent firmware attacks by maintaining best practices, including:
Keeping firmware updated
Firmware updates are usually released to help to fix vulnerabilities or to keep the firmware current and updated. Automatic firmware updates will regularly update the firmware to its latest version. Regular updates help to close any gaps in security quickly and allow the firmware to function correctly.
Protecting against malicious firmware
The best defence against firmware attacks is to have hardware with built-in firmware security. Lots of manufacturers now provide devices that constantly update to prevent vulnerabilities, such as an enhanced BIOS or a hardware shield installed on the device as a default.
Device registration
When you register your device you will receive all firmware update notifications as soon as they become available helping you to keep your hardware device updated and current and helping to close any gaps in security.
Firmware & IoT Devices
Internet-of-things (IoT) devices are vulnerable to attacks, as they may present a large number of connected devices, making them a juicy target. Because of this, IoT devices are popular targets for attackers to launch malware attacks on in an attempt to compromise the system.
To combat this, manufacturers tend to address IoT security via over the air (OTA) updates to firmware, which is a process that helps to reduce disruption and increases the reliability and security of IoT firmware. These OTA updates also aid in patching bugs and generally keeping the systems updated.
Firmware Solutions At Bermondsey Electronics
At Bermondsey Electronics, we specialize in developing embedded systems, software and firmware solutions, which are tailored to your specific application needs, as well as software testing. Whether you’re building IoT devices or industrial automation systems, whatever your industry,
