[KEAZN64] Configuring RTC always causing "HardFault" exception

[mohammedaboelna]

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 */

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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.

[Robin_Shen]

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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[mohammedaboelna]

Hi Robin,

Thank you for your clarification.

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

[mjbcswitzerland]

Hi

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

Regards

Mark

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

[mohammedaboelna]

Hi Mark,

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