TMS320F28P650DK: Reset issue

Jayakrishnan Harikumaran

Prodigy 110 points

Part Number: TMS320F28P650DK

Tool/software:

Hello,

Our code is structured to have a bootloader and application.

When I test the software reset functionality in bootloader, it works.

SysCtl_simulateReset(SYSCTL_SIMRESET_CPU1RSN);

However when I test the same from application code, the cpus get stuck and doesnt get reset.

One of the deltas betweeen bootloader and application is that in bootloader only cpu1 is active while in application both CPUs are active.

I have tried two other options to reset along the one above.

SysCtl_simulateReset(SYSCTL_SIMRESET_XRSN);

SysCtl_resetDevice();

Both display same behaviour. On debugger I can see the following:

Jay

8 months ago

0 Vivek Singh 8 months ago

TI__Guru** 115881 points

Hi,

After reset, on CPU1, does it halt at some place or keep running ? Look like it's getting stuck in the cinit. Please check if device is in continuous reset loop.

Vivek Singh

0 Jayakrishnan Harikumaran 8 months ago in reply to Vivek Singh

Prodigy 110 points

Hi Vivek, Are you suggesting to check the reset pin?

0 Jayakrishnan Harikumaran 8 months ago

Prodigy 110 points

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1390161/tms320f280049c-the-codestart-address

I believe this ticket may have something to do with the reset.

Our flash is configured as follows:

/* SECTIONS OF BOOTLOADER CODE */
      /* Allocating Flash Bank 0 */
      BOOT_BEGIN        : origin = 0x080000, length = 0X400       /* sector 0 jump address */
      BOOTHEADER        : origin = 0x080400, length = 0X400       /* sector 1 bootloader info */
      BOOTFLASH         : origin = 0x080800, length = 0x1F800     /* sector 2 beginning of the bootloader code */

      /* SECTIONS OF APPLICATION CODE - CPU1*/
      /* Allocating Flash Bank 1 */
      BEGIN             : origin = 0x0a0000, length = 2           /* sector 0 CPU1 placeholder for CPU1 application BEGIN section */
      APPHEADER_CPU1    : origin = 0x0a0002, length = 254         /* sector 1 CPU1 application info */
      APPFLASH_CPU1     : origin = 0x0a0100, length = 0x1FF00     /* sector 2 CPU1 application program space */

In application, we set codestart to be BEGIN [for application code start].

codestart        : > BEGIN

Is this the correct linker setting? Or should we set it to be BOOT_BEGIN?

Thanks

Jay

0 Vivek Singh 7 months ago in reply to Jayakrishnan Harikumaran

TI__Guru** 115881 points

I am assuming you are jumping to application from the bootloader. If yes then it should be ok. Can you please confirm the same. If you are expecting CPU to jump to your application directly then that will not work because the ROM code jumps to fixed address which is 0x80000.

Vivek Singh

0 Jayakrishnan Harikumaran 7 months ago in reply to Vivek Singh

Prodigy 110 points

We can start in bootloader and jump to application code.

When we call software reset in application code, it doesnt jump to bootloader.
We were able to do this in F28377D [by triggering a watchdog reset]

0 Vivek Singh 7 months ago in reply to Jayakrishnan Harikumaran

TI__Guru** 115881 points

That is strange. Would it be possible for you to provide a sample code to replicate this issue on our (TI) control card ?

+1 Jayakrishnan Harikumaran 7 months ago in reply to Vivek Singh

Prodigy 110 points

The issue was due to application allocating D2-D5 rams to CPU2 and upon reset that setting doesnt get cleared[upon a software reset]. CPU1 upon bootup was trying to access D2 Ram [as the flash functions are copied over and run from ram].

Once D2 ram was allocated to CPU1 upon entry to bootloader the issue was resolved.

Thanks

Jay

0 Chris Yorkey 7 months ago in reply to Jayakrishnan Harikumaran

TI__Genius 16035 points

Fantastic, timely support on this to you both ! Thanks all, Chris.

RESOLVED

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TMS320F28P650DK: Reset issue