CrossStudio's New Project Wizard simplifies the creation of projects for the Revely RMS101 SBC
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.
To create a new Revely RMS101 SBC project
- Select the File | New | New Project menu item.
- Select Revely RMS101 SBC Projects from the Project Type list.
- Select the required project template type from the Templates list.
- Set the required project name and location directory.
- Click OK.
CrossStudio for ARM supports the Revely RMS101 SBC running applications from
both RAM and FLASH.
To build and debug an application
- Select the project to work on by using the Project | Set Active Project
menu option.
- Select the
configuration you require by using the Build | Set Active
Build Configuration menu option.
- Build the project by using the Build | Build Project menu option.
- If downloading a FLASH application, connect the board's Write Enable
jumper to permit writes to the FLASH.
Warning: Be aware that this will overwrite the bootloader code
shipped with the board. See Installing
the Revely RMS101 SBC Bootloader for a description of how you re-install
the bootloader using CrossWorks. It is also possible to for the program
downloaded to FLASH to cause the JTAG interface to stop responding, see the Toubleshooting
section for more information.
- Please note that this will overwrite
the bootloader code shipped with the board.
- Connect to the appropriate target in the target window.
- Download and start debugging the current project by using Debug | Start
Debugging.
The following sections describe the Revely RMS101 SBC support in more detail.
See ARM Target Support for more
information.
Memory Map Files
The default memory map file $(StudioDir)/targets/Revely_RMS101_SBC/Revely_RMS101_SBC_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 |
SDRAM |
External SDRAM |
0x20000000 |
0x200FFFFF |
FLASH |
External FLASH |
0x40000000 |
0x400FFFFF |
SRAM |
Internal SRAM |
0x60000000 |
0x00007FFF |
The external SDRAM is also mapped to address 0x00000000 in both RAM and FLASH
configurations in order to allow the exception vectors to be modified at
runtime.
Target Startup Code
The default startup code is in $(StudioDir)/targets/Revely_RMS101_SBC/Revely_RMS101_SBC_Startup.s.
It contains the exception vectors, target specific startup code and the default exception handlers.
To install the bootloader using CrossWorks for ARM:
- Load the samples/Revely_RMS101_SBC/kick/kick.hzp
project.
- Open CrossWorks terminal emulator window by clicking View | Terminal
Emulator.
- Set the terminal emulator properties to 115000 baud, 8 bits, no parity, 1
stop bit.
- Download and execute the kick application by clicking Debug | Start
Without Debugging.
- Download the bootloader by clicking Send File from the terminal
emulator's menu and selecting the boot.s19 file.
- It appears to be possible for a program to get the LH79520 into a state
where the JTAG will not respond. If you have a program in FLASH that does
this it can appear that the board or target is malfunctioning as the code
that effects the JTAG will always be run, even after reset. If you are
unable to connect to a target in this state, disable the Identify Target
target property, this will allow you to connect to the target even if the
JTAG interface is not responding. You should then be able to erase the
program in FLASH that is causing the problem by either Installing
the Revely RMS101 SBC Bootloader or running the samples/Revely_RMS101_SBC/flash_erase/flash_erase.hzp
example. Please note that because of the way the nSRST signal is connected
on this board it is possible for the FLASH program to run after reset prior
to download. The successful download of the FLASH erasing program is
therefore reliant on being able to stop the processor before the code that
effects the JTAG is executed. It may therefore take a number of attempts to
download the program and in the worse case be impossible using this scheme.