Most appropriate RTSC platform for the C6a816x DDR2 EVM?

Hi Lee,

The DM8168 device got renamed to C6A8168. The corresponding platforms evmDM8168 and evmC6A8168  are functionally equivalent - meaning they both define the same memory map  Only the device names referred in these platforms are different. We ship both  the platforms in the product to preserve compatibility.

You can use anyone of these platforms in your project. 

The evmTI816X platform refers to the higher end TI816X family of devices. This platform is not relevant for developers on the C6A8168.

Can you attach  the log file - <your_workspace_dir>/.metadata/.log - from your windows 7 workspace to this post?

Regards

Amit

AmitMookerjee said:

The evmTI816X platform refers to the higher end TI816X family of devices. This platform is not relevant for developers on the C6A8168.

Are you sure of this?  Have you seen the memory map shown on the EZSDK FAQ:

http://processors.wiki.ti.com/index.php/EZ_SDK_FAQ

From the Spectrum Digital Hardware doc I know the EVM has 1GB of DDR2 ram.  Here is the C6a8168 platform (from XP):

Besides appearing incomplete (where are the memory holes?), it only shows 256MB of external Ram.  The TI816x platform is closer:

and how I have modified it:

Are some of the DDR segmens incorrect of the C6a8168 EVM?

Lee Holeva

Lee,

Lee Holeva said:

Are you sure of this?  Have you seen the memory map shown on the EZSDK FAQ:

There is indeed 1GB of DDR3 memory available on the EVM. The question here is how you will partition the shared memory between the ARM and the DSP for use for running DSP side code, Linux and CMEM. I do not know the details of  the Integra SDK but I believe you will use the RTSC platform to define the memory map of your DSP side application running SYS/BIOS. The SDK FAQ suggests a value of 32MB reserved for the DSP. However this is customizable and will really depend on your application requirements. The RTSC platform that we ship has selected a default of 256MB.  Again this is a typical value and maybe changed by using the RTSC platform wizard. Note that any change you make to the memory on the DSP side will need a corresponding change to the memory available on the Linux side.  You need to refer to the SDK docs on figuring out how to change the memory available to Linux  and the CMEM driver.

In summary if you want to use the memory map as defined in the SDK FAQ you need to change the DDR3 length from 256MB to 32MB using the platform wizard. You may also want to read http://rtsc.eclipse.org/docs-tip/Memory_Management for an overview of memory management in RTSC and take a look at the platform wizard demos at http://rtsc.eclipse.org/docs-tip/Demo_of_the_RTSC_Platform_Wizard_in_CCSv4

The TI816X is a different device and the platform memory map has been defined for  different application usecases. I would suggest starting with C6A8168 platform and then customize it according to your requirements.

Regards

Amit 

AmitMookerjee said:

I believe you will use the RTSC platform to define the memory map of your DSP side application running SYS/BIOS. The SDK FAQ suggests a value of 32MB reserved for the DSP. However this is customizable and will really depend on your application requirements. The RTSC platform that we ship has selected a default of 256MB.  Again this is a typical value and maybe changed by using the RTSC platform wizard. Note that any change you make to the memory on the DSP side will need a corresponding change to the memory available on the Linux side.

I did not know that I could change the predefined segments of the DDR memory.  Where is the 256MB documented, or better yet, where in the EZSDK will I find the RTSC platform files?

Lee Holeva