Overview

Description

This document covers the configuration and usage of the Hardware Abstraction Layer (HAL) for the TI OMAP L1xx processor family. It is expected to be read in conjunction with platform HAL-specific documentation, as well as the eCos HAL specification. This processor HAL package complements the ARM architectural HAL, ARM9 variant HAL and the platform HAL. It provides functionality common to all OMAP L1xx-based board implementations.

This support is found in the eCos package located at packages/hal/arm/arm9/omap-l1xx within the eCos source repository.

The OMAP L1xx processor HAL package is loaded automatically when eCos is configured for an OMAP-based platform. It should never be necessary to load this package explicitly. Unloading the package should only happen as a side effect of switching target hardware.

Supported Hardware

Supported features of the TI OMAP processor within this processor HAL package include:

• OMAP L1xx-specific hardware definitions

• Interrupt controller

• Timers

• Serial UARTs

• MultiMedia Card Interface (MMC/SD)

• I2C two wire interface

• Pin Configuration and GPIO Support

• Peripheral Power Control

• DMA Support

Support for the on-chip SPI device, SPI NOR flash, interrupt-driven serial, watchdog and wallclock (RTC) features of the OMAP L1xx are also present and can be found in separate packages, outside of this processor HAL.