Bücher veröffentlicht von Micrium

USB is likely the most successful communication interface in the history of computer systems, and is the de-facto standard for connecting computer peripherals.Micri¿m's ¿C/USB-Device is a USB device stack designed specifically for embedded systems. Built from the ground up with Micri¿m's quality, scalability and reliability, it has gone through a rigorous validation process to comply with the USB 2.0 specification.The first part of this book describes the inner-workings of USB using Micri¿m's ¿C/USB-Device stack as a reference. The second part demonstrates how the Renesas YRDKRX63N Demonstration Kit (sold separately) and Micri¿m's ¿C/USB-Device stack can be used as the foundation to build a USB device that relies on a combination of proven hardware and software platforms.Renesas' ultra-low-power RX63N MCU is at the core of the YRDKRX63N board, which incorporates communication functions such as USB 2.0 full-speed (host or device) among others.The examples featured in this book include USB devices with the most basic functionality that will allow you to understand the USB concepts covered in the first part of the book and at the same time, they provide a framework to quickly build devices such as:- USB-to-serial adapter (Communications Device Class)- Mouse or keyboard (Human Interface Device Class)- Removable storage device (Mass Storage Class)- USB medical device (Personal Healthcare Device Class)- Custom device (Vendor Class)

Billions of microcontrollers are sold each year to create embedded systems for a wide range of products. An embedded system is an application-specific computer system which is built into a larger system or device. Using a computer system offers many benefits such as sophisticated control, precise timing, low unit cost, low development cost, high flexibility, small size, and low weight. These basic characteristics can be used to improve the overall system or device in various ways:¿ Improved performance¿ More functions and features¿ Reduced cost¿ Increased dependabilityThis book uses the Renesas RX62N family of processors to demonstrate concepts with hands-on examples complete with source code targeting the YRDKRX62N evaluation board. The 32-bit RX processor core provides remarkable instruction throughput, with high clock rates and hardware support for floating-point and digital-signal processing instructions. The core is also quite agile, responding to fast interrupts in 5 clock cycles. These processors offer a wide range of sophisticated peripherals to simplify interfacing with and controlling external devices.

This book puts the spotlight on how a real-time kernel works using Micrium s C/OS-III as a reference. The book consists of two complete parts. The first describes real-time kernels in generic terms. Part II provide examples for the reader, using Texas Instruments EVM-EVALBOT, a small, robotic evaluation board. The board is based on the Stellaris LM3S9B92 which combines the popular ARM Cortex-M3(r) architecture with Ethernet MAC+PHY, USB OTG (On-The-Go), and I2S. Together with the IAR Systems Embedded Workbench for ARM development tools, the evaluation board provides everything necessary to enable the reader to be up and running quickly, as well as a fun and educational experience, resulting in a high-level of proficiency in a short time.This book is written for serious embedded systems programmers, consultants, hobbyists, and students interested in understanding the inner workings of a real-time kernel. C/OS-III is not just a great learning platform, but also a full commercial-grade software package, ready to be part of a wide range of products. C/OS-III is a highly portable, ROMable, scalable, preemptive real-time, multitasking kernel designed specifically to address the demanding requirements of today s embedded systems. C/OS-III is the successor to the highly popular C/OS-II real-time kernel but can use most of C/OS-II s ports with minor modifications. Some of the features of C/OS-III are: Preemptive multitasking with round-robin scheduling of tasks at the same priority Supports and unlimited number of tasks and other kernel objects Rich set of services: semaphores, mutual exclusion semaphores with full priority inheritance, event flags, message queues, timers, fixed-size memory block management, and more. Built-in performance measurements