Real-time Operating System Design: customize An Os For A Powerful Embedded Mcu

摘要

Naubert's ArmExe is an RTOS for the Luminary Micro Stellaris ARM Cortex-M3 family of microcontrollers and Keil's uVision environment. The multitasking preemptable executive uses task priorities, separate task and kernel stacks, and execution privileges. It handles all interrupts with priorities, supports nested interrupts, and implements binary semaphores and events as the resource-sharing mechanisms. When I first received my Luminary Micro evaluation board for the Luminary Micro Designstellaris2006 contest, I couldn't believe how much power the little Stellaris chip had. The demonstration program that came with the LM3S811 evaluation board displayed an impressive game in a low-cost, 32-bit platform. Thirty-two bits? Yes, 32 bits in a microcontroller! The Luminary Micro Stellaris ARM with its first implementation of ARM's new Cortex-M3 and its Thumb-2 instruction set is a 32-bit core designed to substitute for 8- or 16-bit microcontrollers in embedded applications.