TMDSDOCK28335: Communication Issue

May,

Please take a look at the flash example in C2000Ware here C:\ti\c2000\C2000Ware_4_01_00_00\device_support\f2833x\examples\flash_f28335\.  This takes a previous example that is linked to RAM and has the deltas needed to make it run from flash.

The other step here would be to change your boot mode to Flash, so that on power up the code will branch to the correct locations.  The boot pins are detailed in the device datasheet, but first you need to use the above example as a template to port your code to boot to flash.

We also have a F2833x workshop that goes into more depth on the topic as well as has a lab example/soln on the above.

https://dev.ti.com/tirex/explore/node?node=Ae-QPe2n1irgj1a.Fw-zPA__jEBbtmC__LATEST

Best,

Matthew

Hi Matthew,

Just received response from customer, please see details below.

Thanks for the information about the flash, I looked to the examples and read the documentation, however, I have not been able to make it work. I´m using the Lab_10.cmd as the linker, and also added the Lab_10.h, Flash.c, written the memcpy as it indicates in the example, but until now the program doesn´t work. I tried to run the Lab_10 project and it works correctly, even without the jumpers on the boot pins. I´m not sure what I´m doing wrong or missing here, I would really appreciate if you can provide me with more help.

Regards,
May

May,

I don't think this is something we will be able to debug on the E2E generically.  Would it be possible for customer to provide their original and new .cmd(linker file) as well as the code they are invoking the memcpy, etc?

Best,

Matthew

Hi Matthew,

Just received response from customer, please see details below.

I'm trying to use the .cmd of the workshop, as I explained in the previous message.

DAB_PWM3.rarIQmath.rar

I was thinking that TI has a lot of linker command files in the c2000 folder. There are named for specific microcontroller model, some models have RAM and Flash, however for the f28335 there is only RAM I believe. Do you think is possible to obtain a generic linker command file that works?

Thank you.

Regards,
May

May,

I didn't have time today to review the files the customer sent.  In terms of trying to re-use an existing file, I think if they looked at the 2806x device, it will have similar memory map they can try to re-use.  If anything they can just look at that structure and change the memory addresses to match the F2833x.  I'll try my best to look at this more closely tomm.

Best,

Matthew