CC2642R: SysCtrlSystemReset() is not working sometimes

Mehul Dalal

Part Number: CC2642R
Other Parts Discussed in Thread: UNIFLASH,

I have an application firmware in place where it calls SysCtrlSystemReset() in certain condition. The expectation after this function is called it to have the firmware boot up again.

However, sometimes we are observing that the firmware boots up after this API is called but sometimes it does not.

Just to add on to this, we have JTAG connection always present in the board from TI LP XDS debugger to our custom board. We are also observing similar issue while using UniFlash where after connecting to the board, upon issuing "Board Reset" or "CPU Reset", the firmware doe not boot sometimes. Also, there is no debug session in place. The JTAG connection is there only to download the firmware into the board having CC2642.

over 3 years ago

+1 Clément over 3 years ago

TI__Guru** 100070 points

Hi Mehul,

I hope you are doing well.

When the debugger is connected, the ICEPick can stop the device after a warm reset in order to allow the user to debug the device. You can found more details about the Halt In Boot in the CC13x2, CC26x2 SimpleLink Wireless MCU Technical Reference Manual (Section JTAG Interface, part 6.6).

Could you please verify if the device perform the reset as expected when no debugger is attached?

If it is not possible for you to remove the debugger, you could let the device reboot (with the debugger attached) then follow the steps here to connect the debugger to a running target. That way you will manage to identify where the code hangs.

I hope this will help,

Best regards,

0 Ryan Brown1 over 3 years ago

TI__Guru**** 208707 points

Hello Mehul,

Are you aware of the Halt In Boot (HIB) feature of the CC2642R? This is the common reason behind the inability to boot after a software reset, please see the "Similar topics" E2E posts for relevant issues. You can reference the BLE5-Stack User's Guide or Section 6.6 of the Technical Reference Manual for more information. Please monitor your JTAG lines and submit your hardware design to SIMPLELINK-2-4GHZ-DESIGN-REVIEWS if you would like additional implementation feedback or advice.

Regards,
Ryan

0 Mehul Dalal over 3 years ago in reply to Clément

Expert 2180 points

Thanks Clement.

The reference in the section 6.6 makes sense to me. I will test the behavior by disconnecting the board and JTAG. I will let you know about the same in next couple of days.

Thanks,
Mehul

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CC2642R: SysCtrlSystemReset() is not working sometimes