Средства и методы разработки

CMSIS - это первая ссылка в гугле http://www.arm.com/products/CPUs/CMSIS.html
As part of the CMSIS ARM provides the following software layers that are available for various compiler implementations: Core Peripheral Access Layer: contains name definitions, address definitions and helper functions to access core registers and peripherals. It defines also a device independent interface for RTOS Kernels that includes debug channel definitions. Middleware Access Layer: provides common methods to access peripherals for the software industry. The Middleware Access Layer is adapted by the Silicon Vendor for the device specific peripherals used by middleware components. The middleware access layer is currently in development and not yet part of this release. These software layers are expanded by Silicon partners with: Device Peripheral Access Layer: provides definitions for all device peripherals Access Functions for Peripherals (optional): provides additional helper functions for peripherals