topic Re: entering and exiting low power-modes in Kinetis Microcontrollers

entering and exiting low power-modes

pradyumnakammar — Wed, 05 Jun 2013 10:06:34 GMT

do i have to set MCG settings again after exiting VLPR mode?

before going into VLPR, MCG is set to BLPI . in VLPR i run some Calculations, UART communications.

further i want to put the processor to VLLS1 mode and wake up the processor from reset flow to VLPR

how do i do it ? having problemsin waking up processor from VLLS1 with LLWU interrupts

Re: entering and exiting low power-modes

Paul_Tian — Thu, 06 Jun 2013 03:54:50 GMT

Hi, Kammardi

Yes, you need to set it back. For all lower power mode, you can reference this link http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KL2&nodeId=01624698C9E3EC&fpsp=1&tab=Design_Tools_Tab, in item "Simulation and Models-BSDL". After you installing, you can find demo code in path ...\KL05-SC\klxx-sc-baremetal\build\iar\low_power_demo.

Hope my reply can help you.

Best Regards

Pau;

Re: entering and exiting low power-modes

pradyumnakammar — Thu, 06 Jun 2013 08:26:05 GMT

Hi Tian,

yes i have already seen this example!!

in the example they exit VLPR through reset not with ant exiting routine!! with the help of the document AN4503 which the Freescale has provided i have written the exiting routine but still LLWU does not work.

things i have done and tried :

1. RUN mode (FEE) --> VLLS1 wakes to RUN for LLWU pin and module interrupt through reset-flow

2. RUN (FEE) --> VLPR(BLPE) for comunication --> Exit VLPR routine --> VLLS1 . Now LLWU interrupt does not work but RTC interrupt works

tried the workaround in eratta still LLWU not working (e5472)