Problem waking from VLLS

chrissolomon — Thu, 27 Nov 2014 21:27:40 GMT

Hi,

I am using MQX4.1 on a K70 (part of our product).

We have been working on getting our product updated from MQX4.0.2 on and off for a while now, and I only have a few issues remaining.

One of the things I have been struggling with is getting the unit to wake from VLLS3.

Here is the configuration:

At the point we go to sleep we are running from the internal reference oscillator, with OSC0 configured but not used:

MCG_C1 0x44

MCG_C2 0x27

MCG_C3 0x45

MCG_C4 0x14

MCG_C5 0x0

MCG_C6 0x0

MCG_S 0x17

MCG_SC 0x2

MCG_ATCVH 0x0

MCG_ATCVL 0x0

MCG_C7 0x1

MCG_C8 0x0

MCG_C10 0x0

MCG_C11 0x0

MCG_C12 0x0

MCG_S2 0x0

OSC0_CR 0xA0

Cannot access memory at address 0x400e5000

OSC1_CR 0x

(OSC1 is not accessible because it is not clocked)

SIM_SOPT1 0x80089010

SIM_SOPT1CFG 0x0

SIM_SOPT2 0x40471004

SIM_SOPT4 0x0

SIM_SOPT5 0x7F7F7F00

SIM_SOPT6 0x0

SIM_SOPT7 0x0

SIM_SDID 0x31DE

SIM_SCGC1 0x800

SIM_SCGC2 0x0

SIM_SCGC3 0xB425010

SIM_SCGC4 0xF00430B0

SIM_SCGC5 0x47F8F

SIM_SCGC6 0x78440007

SIM_SCGC7 0x7

SIM_CLKDIV1 0x13770000

SIM_CLKDIV2 0x2

SIM_FCFG1 0xD000F00

SIM_FCFG2 0x20A00000

SIM_UIDH 0x320000

SIM_UIDMH 0x29C67801

SIM_UIDML 0x4E452589

SIM_UIDL 0x200F001A

SIM_CLKDIV3 0x0

SIM_CLKDIV4 0x0

SIM_MCR 0x10024

before we try to go to sleep we set the deepsleep functionality:

SCB_SCR = SCB_SCR_SLEEPDEEP_MASK | SCB_SCR_SLEEPONEXIT_MASK;

and we configure the SMC:

SMC_PMPROT 0x2A

SMC_PMCTRL 0x4

SMC_VLLSCTRL 0x3

SMC_PMSTAT 0x1

The LLWU module is configure to wake up on RTC alarm, several port pins, or on reset pin:

LLWU_PE1 0x0

LLWU_PE2 0xFC

LLWU_PE3 0x3F

LLWU_PE4 0x0

LLWU_ME 0x60

LLWU_F1 0x0

LLWU_F2 0x0

LLWU_F3 0x0

LLWU_FILT1 0x0

LLWU_FILT2 0x0

LLWU_RST 0x2

The unit seems to 'stop', but doesn't wake up again.

This used to work in MQX4.0.2, so I am assuming I have missed some register or peripheral that needs clocking. Any assistance would be greatly appreciated, I have been struggling with this one for a full week now.

Thanks

Chris

Re: Problem waking from VLLS

soledad — Thu, 04 Dec 2014 00:52:00 GMT

Hi Chris,

I think you can find useful the below application note. I hope this helps

http://cache.freescale.com/files/32bit/doc/app_note/AN4447.pdf

Have a great day,
Sol

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Problem waking from VLLS

Re: Problem waking from VLLS