Code Confidencebuild 3.0.0.201402161939
eCos Reference Manual
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Configuration

Name

Configuration -- Platform-specific Configuration Options

Overview

The STM32F4-Discovery platform HAL package is loaded automatically when eCos is configured for an STM32F4-Discovery target. It should never be necessary to load this package explicitly. Unloading of the package should only occur as a result of switching target hardware.

Startup

The STM32F4-Discovery platform HAL package supports two startup types which may be selected using the configuration option CYG_HAL_STARTUP:

JTAG

This is the startup type which is normally used during application development. arm-eabi-gdb is used to download a JTAG startup application into memory via OpenOCD and the ST-LINK/V2 SWD debug interface. eCos startup code will perform all necessary hardware initialization.

ROM

This startup type can be used for finished applications which will be programmed into flash at location 0x08000000. It can also be used for debugging larger applications which do not fit in available SRAM. The application must be programmed to flash using the ST-LINK tool before debugging commences. eCos startup code will perform all necessary hardware initialization.

Flash Driver

The platform HAL package contains flash driver support. This support may be activated by loading the eCos flash I/O infrastructure package CYGPKG_IO_FLASH.

System Clock

By default the system clock interrupts once every 10ms, corresponding to a 100Hz clock. This period can be modified using the configuration option CYGNUM_HAL_RTC_PERIOD.

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