topic Re: [KEAZN64] Configuring RTC always causing "HardFault" exception in Kinetis Microcontrollers

[KEAZN64] Configuring RTC always causing "HardFault" exception

mohammedaboelna — Mon, 27 Aug 2018 11:07:54 GMT

Hello,

I am trying to configure RTC in target cortex-M0 KEAZN64 as follows;

SIM_PINSEL |= SIM_PINSEL_RTCPS_MASK; /* To get the toggled pin on PTC5 */

RTC_MOD = 16000; /* Setting MOD value by 16000 */

---------------------------

After debugging, I found out that any write any of RTC registers configuration causes "hardfault" exception (HardFault_Handler)

Any help or advice please ?

Thank you inn advance.

Re: [KEAZN64] Configuring RTC always causing "HardFault" exception

mjbcswitzerland — Mon, 27 Aug 2018 22:05:46 GMT

You need to first enable the clock to the RTC module - see the SIM_SCGC register.

Regards

Mark

http://www.utasker.com/services.html

Re: [KEAZN64] Configuring RTC always causing "HardFault" exception

Robin_Shen — Tue, 28 Aug 2018 01:57:33 GMT

Hi Mohammed Aboelnasr,

As Mark said, you need to enable the clock gate SIM_SCGC[RTC] of RTC module first.

You can direct refer the Lab3_Blinky_RTC_KEA64 example of SDK-DRIVER-FRDM-KEA-S32DS.(...\SDK-DRIVER-FRDM-KEA-S32DS\KEAZ64 Driver testcode and Examples (for S32DS)\KEAZ64_Lab Code Examples\Lab3_Blinky_RTC_KEA64\src)

Best Regards,

Robin

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Re: [KEAZN64] Configuring RTC always causing "HardFault" exception

mohammedaboelna — Tue, 28 Aug 2018 05:23:25 GMT

Hi Mark,

Thank you for this note. I don't know how I missed the clock gating control !! :smileygrin:

Re: [KEAZN64] Configuring RTC always causing "HardFault" exception

mohammedaboelna — Tue, 28 Aug 2018 05:24:45 GMT

Hi Robin,

Thank you for your clarification.

I don't know how I missed this point :smileygrin: