The HAL Port

Overview

This documentation explains how the eCos HAL specification has been mapped onto the MCB2387 board hardware, and should be read in conjunction with that specification. The LPC2387 platform HAL package complements the ARM architectural HAL and the LPC2xxx variant HAL. It provides functionality which is specific to the target board.

Startup

Following a hard or soft reset the HAL will initialize or reinitialize many of the on-chip peripherals. There is an exception for RAM startup applications which depend on a ROM monitor to do most of this and for JTAG startup, where some initialization will be done by the JTAG device.

For ROM startup, the HAL will perform additional initialization, programming the various internal registers including PLL (for the clocks); Memory Mapping control registers to map SRAM to 0x0 and the Memory Acceleration Module (MAM). The details of the early hardware startup may be found in the header cyg/hal/hal_platform_setup.h.

Linker Scripts and Memory Maps

The platform HAL package provides the memory layout information needed to generate the linker script. The key memory locations are as follows: