CrossStudio's New Project Wizard simplifies the creation of projects for the OKI ML674000 evaluation board by creating a project with the appropriate project settings, memory map files and startup files. See Creating a New Project for more information on creating projects.
CrossStudio for ARM supports the OKI ML674000 Evaluator running applications from both RAM and FLASH.
Warning: Downloading to FLASH on the OKI ML674000 evaluation board can erase and overwrite the firmware. See Restoring the OKI ML674000 Evaluator Firmware for details of how CrossStudio can be used to restore the firmware.
The following sections describe the OKI ML674000 Evaluator support in more detail. See ARM Target Support for more information.
The default memory map file $(StudioDir)/targets/OKI_ML674000_Evaluator7T/OKI_ML674000_Evaluator_MemoryMap.xml has been provided. This file is used to describe the memory layout of the target and is used for linking and debugging. The placement of program sections within the memory map for both RAM and FLASH configurations is described by the non-target-specific default memory maps $(StudioDir)/targets/flash_placement.xml and $(StudioDir)/targets/sram_placement.xml.
The memory segment layout for both configurations is the same and is described in the following table:
Type | Description | Start Address | End Address |
FLASH | External FLASH | 0xC8000000 | 0xC81FFFFF |
SDRAM | External SDRAM | 0xC0000000 | 0xC01FFFFF |
SRAM | Internal SRAM | 0x10000000 | 0x10001FFF |
SRAM | External SRAM | 0x00000000 | 0x000FFFFF |
The default startup code is in $(StudioDir)/targets/OKI_ML674000_Evaluator/OKI_ML674000_Evaluator_Startup.s. It contains the exception vectors and the default exception handlers. The FLASH version of the code (specified by defining BUILD_FLASH) is also responsible for configuring memory to match the above memory map and copying the exception vectors into RAM.
The FLASH memory on the OKI ML674000 evaluation board is divided into two 1MByte banks which can be swapped using the BANK switch on SW1. The default bank (ON position) is shipped with a basic loader firmware. If CrossStudio downloads an application using the FLASH configuration with either the BANK switch set to ON or if the application is larger in size than 0x100000 bytes, the firmware will be overwritten. This is reversible as CrossStudio can be used to re-program the firmware image into FLASH.