Kinetis MicrocontrollersのトピックRe: COP in KL16

COP in KL16

amitmehta — Fri, 25 May 2018 11:28:44 GMT

I tried configuring COP for KL16 using SDK example but COP was not able to reset system.

One thing that i noticed is SDK drivers files are for MKL26Z4 not MKL16Z4. So does this make any difference.

i also tried setting Clock source to bus clock from Low Power Clock Source.

Re: COP in KL16

kerryzhou — Mon, 28 May 2018 04:33:00 GMT

Hi Mehta,

Please check your COPC register, do you disable the watchdog in your code?

All of the bits in COPC register can be written only once after a reset.

So, if you disable the watchdog after reset, then it won't work.

Please check your COPC register at first, if you disable the watchdog, please comment:

SIM->COPC = (uint32_t)0x00u;

The watchdog in KL16 and KL26 is the same.

I think it still the code's problem.

Have a great day,
Kerry

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Re: COP in KL16

amitmehta — Mon, 28 May 2018 06:15:12 GMT

Hi Kerry,

Yeah i have set preprocessor DISABLE_WDOG=0, and have check in debugging mode code is not going inside that condition.

I'll once more time try, earlier i have tried using demo code and even tried setting SIM->COPC = (uint32_t)0x06u;//COPCLKS

in SystemInit before

#if (DISABLE_WDOG)
/* SIM_COPC: COPT=0,COPCLKS=0,COPW=0 */
SIM->COPC = (uint32_t)0x00u;
#endif /* (DISABLE_WDOG) */

condition and even in main.c

But if put resisters in to watch, not values were writen in to SIM's COPC resister.

I'll once more time try and check if any other place i can set these bits

Re: COP in KL16

amitmehta — Mon, 28 May 2018 11:52:00 GMT

Hi Kerry,

Regarding last update it was issue due to debugger, which was disabling watchdog while programming, so to test i have to program and then reset controller.

Thanks for help.

Re: COP in KL16

kerryzhou — Tue, 29 May 2018 08:55:43 GMT

Hi Amit,

Thanks for your updated information.

As I know, the JLINK won't disable the watchdog, if you want to debug the watchdog, you also can use JLINK.

Wish it helps you!

Have a great day,
Kerry