topic Re: MKE15 Stop Mode in Kinetis Microcontrollers

MKE15 Stop Mode

David_94 — Thu, 22 Apr 2021 07:22:44 GMT

Hi,

I'm trying to make the MKE15 enter STOP mode. I found this code on the forum

void stop (void)
{
 /* Set the SLEEPDEEP bit to enable deep sleep mode (STOP) */
 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; 

 /* WFI instruction will start entry into STOP mode */
#ifndef KEIL
        // If not using KEIL's uVision use the standard assembly command
 asm("WFI");
#else
        // If using KEIL's uVision, use the CMSIS intrinsic
 __wfi();
#endif
}

Is it enough?

How do I have to set registers in order that the micro wake up from stop mode if I have an active edge on the UART?

Re: MKE15 Stop Mode

mjbcswitzerland — Thu, 22 Apr 2021 15:51:31 GMT

STOP mode is controlled by the Cortex core so doesn't need any more registers configured (the various low leakage modes require additional setup).

STOP mode will exit whenever there is a pending interrupt so any peripheral (whose clock is not stopped in STOP mode) configured with an interrupt is adequate.

The asynchronous UART rx edge wake up is not needed in STOP mode - it is only needed in VLPS.

Regards

Mark
[uTasker project developer for Kinetis and i.MX RT]
Contact me by personal message or on the uTasker web site to discuss professional training, solutions to problems or rapid product development requirements

For professionals searching for faster, problem-free Kinetis and i.MX RT 10xx developments the uTasker project holds the key: https://www.utasker.com/kinetis/FRDM-KE15Z.html

Re: MKE15 Stop Mode

nxf56274 — Fri, 23 Apr 2021 01:45:19 GMT

Hi,

We have the example about power manage in directory '2.9.0_FRDM-KE15Z\boards\frdmke15z\demo_apps\power_mode_switch'.

Have a great day,
TIC

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