TMS320F28377D: Reconfiguring Boot pins using DCSM section

Sourabh Patil

Part Number: TMS320F28377D
Other Parts Discussed in Thread: C2000WARE, SYSCONFIG, LAUNCHXL-F28379D

Tool/software:

Hi Team,

We have designed a custom board using TMS320f28377D and while testing we encountered an issue - that the uC was not booting properly. After investigation we found out that it was caused due to unconfigured boot pins (Gpio 72 & 84) in our deisgn. They were loft floating initially. Then we pulled up these pins externally to 3v3 with resistors And we observed the uC booted properly (from flash) after POR.

You can refer this thread for some more context.

Now, the problem is, we have already used gpio 84 for some other purpose in our design and wanted to use some different pins by configuring them as boot pins.

So, we tried exploring GPIO 42 and 43 as Boot pins instead of 72 & 84. We are following the dcsm_security_tool example project imported from Resource Explorer tab in the CCs IDE : c2000 real-time microcontrollers/Embedded Software/C2000Ware(6.00.00.00)/English/Devices/F2837XD/F28377D/Examples/Driverlib/cpu1/dcsm/dcsm_security_tool

We have made below changes in the sysconfig file provided in that project:

Now, once we test these changes, In debug mode we observe below error after executing the last line : LB _c_int00

Observe below images:

So, wanted to know why is this happening?

Could you help us resolving this ?

Let us know if we are missing anything that also needs to be configured along with the things mentioned in the sysconfig picture above.

FYI: We are using LAUNCHXL-F28379D to test this reconfiguration of Boot pins change first then planning to implement it on our custom board based on the results. The pins 42, 43 aren't pulled up/high with a resistor to 3.3 yet. And we don't see the code reaching main() hitting the set breakpoint inside main().

2 months ago

0 Sourabh Patil 2 months ago

Prodigy 245 points

Hi Team, following up to know if we could have any update on this ?

0 Sourabh Patil 2 months ago in reply to Sourabh Patil

Prodigy 245 points

Hi team, could we have any update here?

We also need the steps to port/migrate these settings from the example project dcsm_security_tool to our application.

0 Luke Jones 2 months ago in reply to Sourabh Patil

TI__Mastermind 28020 points

Hello,

Apologies for the delayed response. Why are you not pulling GPIO42 and 43 high? This is necessary to select the GET mode (flash boot) upon a device reset.

--Luke

0 Sourabh Patil 2 months ago in reply to Luke Jones

Prodigy 245 points

Hi Luke,

Thank you for your response.

We didn't pull those pins up since we wanted to check the behaviour of program execution in debug mode to verify whether uC doesn't boot up after we program those two pins as boot pins via OTP configuration.

Now, after pulling them up, we observe that uC boots up and hence validated the boot pins configuration.

Now, we want to port/migrate these settings from the example project dcsm_security_tool to our application, could you help us with the steps/procedure to do so.

I see the example project generates 2 files dcsm.asm and dcsm.cmd, how do these files need to be included in our application? Are there any project settings that are needed to be made while doing so?

0 Luke Jones 2 months ago in reply to Sourabh Patil

TI__Mastermind 28020 points

If you are using Sysconfig in your full project, you can open your .syscfg file and add the same DCSM configuration there. If you are not using SysConfig or do not have a SysConfig enabled project (for example a driverlib project), then you can copy the generated dcsm.asm and dcsm.cmd files into your project and the DCSM settings should be included in the .out when you build in FLASH mode.

0 Sourabh Patil 2 months ago in reply to Luke Jones

Prodigy 245 points

Hi Luke,

Thanks for the response.

Our project does have an empty sysconfig file. But it doesn't have DCSM section present in it.

Do I need to add it from somewhere else? Or am I missing anything here ?

0 Luke Jones 2 months ago in reply to Sourabh Patil

TI__Mastermind 28020 points

It looks like your project is not pointing to a C2000Ware SysConfig in the project properties. Here's an example of what your project properties should look like:

0 Sourabh Patil 2 months ago in reply to Luke Jones

Prodigy 245 points

Hi Luke,

Yes, You are right. The empty.sysconfig file in my project does point to C2000Ware SysConfig in the project properties

Is there any way I could link/make it point to it ?

Also, Without using sysconfig, just directly importing the dscm.asm and dcsm.cmd files from the example project should work right ?

0 Luke Jones 2 months ago in reply to Sourabh Patil

TI__Mastermind 28020 points

yes you can directly port the dcsm.asm and dcsm.cmd files

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28377D: Reconfiguring Boot pins using DCSM section