eCosPro® Reference Manual
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# Hardware definitions

## Name

AT91RM9200 hardware definitions -- Details on obtaining hardware definitions for AT91RM9200

## Register definitions

The file `<cyg/hal/at91rm9200.h>` can be included from application and eCos package sources to provide definitions related to AT91RM9200 subsystems. These include register definitions for the interrupt controller, power management controller, clock generator, memory controller, external bus interface, GPIO, USART, MCI, TWI (I²C®), Ethernet, timer counter, RTC, and SPI subsystems.

## Initialization helper macros

The file `<cyg/hal/at91rm9200_init.inc>` contains definitions of helper macros which may be used by AT91RM9200 platform HALs in order to initialise common AT91RM9200 subsystems without excessive duplication between the platform HALs. Typically this file will be included by the `hal_platform_setup.h` header in the platform HAL, in turn included from the architectural HAL file `vectors.S`.

This file is solely intended to be used by platform HALs. At the same time, it is only present to assist initialization, and platform HALs are not obliged to use it if their startup requirements vary.

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