cc26xx contiki cpu reset cc26xx-web-demo

mike snyder

Other Parts Discussed in Thread: CC2650

Hi e2e -

I have tried to add a COAP call to the cc26xx web demo to reset the cc26xx CPU.
Neither of the following calls are actually resetting the CPU:

ti_lib_sys_ctrl_system_reset(); // from ti-lib.h
SysCtrlSystemReset(); // from cc26xx driverlib sys_ctl.h

On a normal reset/boot, the green LED blinks rapidly until it joins the mesh.
What I am seeing, is the LED's do not light up, and the CPU is not responsive to button presses or COAP requests.

On the BLE stack for the same platform, I've been using HAL_SYSTEM_RESET reliably.
Unfortunatley, contiki does not have access to the same HAL

Does anybody know a reliable way to reset the cc26xx CPU with contiki?

over 8 years ago

0 Andreas Urke over 8 years ago

Expert 1460 points

Hi Mike,
I have used watchdog_reboot() to reboot the sensortag. Inspired from cc26xx-demo.c. It this what you are looking for?

Regards,
Andreas

0 mike snyder over 8 years ago in reply to Andreas Urke

Intellectual 945 points

I forgot about that one! I can give that a shot. Thanks for the reminder.

0 mike snyder over 8 years ago in reply to mike snyder

Intellectual 945 points

Hm. Same results with the watchdog_reboot(). Something tells me this is wonky, trying to reset from within the context of the coap server.

0 YiKai Chen over 8 years ago in reply to mike snyder

Guru 735455 points

Try to define "#define HAL_SYSTEM_RESET() *((uint32 *)0x40082270) = 1;" and use it to reset CC2650.

0 Mark Solters over 7 years ago

Prodigy 150 points

I have found that each of the following three examples may be equivalently used to reboot the CC2650 in Contiki.

ti_lib_sys_ctrl_system_reset();

SysCtrlSystemReset();

#define HAL_SYSTEM_RESET(...) *((uint32_t *)0x40082270) = 1
HAL_SYSTEM_RESET();

However -- I have found that the presence of a debugger can interrupt the reboot, and produces the problems you cite! For instance, if I use a CC2650 in the srf06 board, and run one of the above reboot commands while using USB power, the CC2650 will shut down but not turn back on!

But, if I disconnect USB and switch to BAT power (2 AAAs), then it works perfectly!

I haven't tested this using the devpack + sensortag but I wouldn't be surprised if there was a similar problem. Looks like debuggers interrupt proper reboot.

0 Mark Solters over 7 years ago in reply to mike snyder

Prodigy 150 points

Despite my previous answer, I too have found that the CoAP feature is somehow specifically interfering with system reboot! All 3 of the syntax representations for a reboot command that I posted fail in the same way -- the CC2650 freezes, but does not reboot. I'm not sure what kind of recourse we have here. Why wouldn't the reset mechanism work when called from within a CoAP server?? The same code works when called from anywhere else (that I could tell). Could it be some sort of oscillator/clock issue?

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cc26xx contiki cpu reset cc26xx-web-demo