CCS/TMS320C6457: Cannot load programs into DSP through HPI interface with Big Endian setting but works with little endian.

user6243981

Prodigy 20 points

Part Number: TMS320C6457

Tool/software: Code Composer Studio

Hi everyone,

Our team is trying to load and run a program on DSP through the HPI interface with the ARM core of a Zynq FPGA.

We have made it done when we set both CCS project and DSP hardware(pull up the pin GPIO[0] A5) to little endian.

But when we switch all the settings to big endian, it doesn 't work at all.

The test programs, both big and little endian, are the same HelloWorld program. And they all work well if we load and run them through the emulator.

Because lots of our low level codes are written for big endian target, we need to solve this problem.

Could anyone help us to sort it out?

Thanks in advance!

PS: We are located in Guangzhou, China and if a FAE can give advice in person would be best.

over 4 years ago

0 Sahin Okur over 4 years ago

TI__Mastermind 27355 points

Hello,

Is the ARM core big endian or little endian? If little endian, you may want to look at the discussion here: https://e2e.ti.com/support/processors/f/791/t/782229

Also, please see if the following documents help.

TMS320C6457 DSP Host Port Interface (HPI) User's Guide

Bootloader User's Guide for the TMS320C645x/C647x (Rev. G)

Creating a DSP Boot Image for Host Boot

Regards,
Sahin

0 user6243981 over 4 years ago in reply to Sahin Okur

Prodigy 20 points

Hi Sahin,

Thanks for your reply.

The ARM core is little endian and we have gone through the article and documents you mentioned above before I sent this post, but still no luck.

And the HPI interface is 16-bit width.

We have been working on this for several days, and desperate for an idea to locate the problem and solve it.

Could I ask a simple question:

Assume that I have a platform works when both the CCS project and hardware are set to little endian, what if I just simply change the settings of the CCS project and the hardware configuration pin to big endian, will it work as well?

Thank you very much!

Best Regards,

Li Xuan

Processors

Processors forum

CCS/TMS320C6457: Cannot load programs into DSP through HPI interface with Big Endian setting but works with little endian.