topic Re: KL25z LLS Wake-Up - Reactivating PORT in Kinetis Microcontrollers

KL25z LLS Wake-Up - Reactivating PORT

Bergma — Wed, 27 Apr 2022 21:00:17 GMT

I am having some trouble getting the KL25z to wake up fully after LLS. By that i mean that I am unable to utilize the I/O pins, i.e. the PORT module, after wakeup.

I gather that i need to reactivate something, but I have been unable to find the documentation regarding this.

Below is the LLWU IRQ Handler

void LLWU_IRQHandler() { if (LLWU->F2 & LLWU_F2_WUF14_MASK) { // Clear Wake-up flag for pin LLWU->F2 |= LLWU_F2_WUF14_MASK; // Disable sleep on exit SCB->SCR &= ~SCB_SCR_SLEEPONEXIT_Msk; } else if (LLWU->F3 & LLWU_F3_MWUF0_MASK) { // write 1 to TCF to clear the LPT timer compare flag LPTMR0->CSR |= LPTMR_CSR_TCF_MASK; PTB->PTOR |= MASK(0); } //PMC->REGSC &= ~PMC_REGSC_ACKISO_MASK; }

I am using MCUXpresso with NXP SDK.

I'm kinda banging my head against the wall here.

Mathias

Re: KL25z LLS Wake-Up - Reactivating PORT

Robin_Shen — Thu, 28 Apr 2022 05:24:27 GMT

Hi Mathias,

Please refer the frdmkl25z_demo_apps_power_mode_switch SDK example:

Best Regards,
Robin
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Re: KL25z LLS Wake-Up - Reactivating PORT

Bergma — Thu, 28 Apr 2022 06:48:21 GMT

Hi Robin.

I could have sworn that i already tried that. Nevertheless i worked!!!

Thanks alot

Mathias