topic Re: FRDMK22 enable PEE mode in Kinetis Microcontrollers

FRDMK22 enable PEE mode

claudiobrunelli — Mon, 27 Nov 2017 23:47:34 GMT

Hi.

I'd like to move my frdmk22 board, to PEE clock mode but I can't see different clock even changing values

in the below code.

Do I forget something ? Or ther's something wrong in my code ?

Thanks in advance...

Claudio

void PEE_InitMode(void)
{
   MCG->C2 = 0x2C;
   MCG->C1 = 0x98;
   while ((MCG->S & MCG_S_OSCINIT0_MASK) == 1)   ;
   while ((MCG->S & MCG_S_IREFST_MASK) == 0);
   while ((MCG->S & MCG_S_CLKST(10)) == 0x10);

   MCG->C5 = 0x03; // /4
   MCG->C6 = 0x41; // *25
   while ((MCG->S & MCG_S_PLLST_MASK) == 1);
   while ((MCG->S & MCG_S_LOCK0_MASK) == 1);

MCG->C1 = 0x01;
while ((MCG->S & MCG_S_CLKST(01)) == 0x01);

SIM->SOPT2 |= SIM_SOPT2_PLLFLLSEL_MASK;
}

Re: FRDMK22 enable PEE mode

kerryzhou — Tue, 28 Nov 2017 03:27:30 GMT

Hi Claudio Brunelli,

Enable the PEE mode need to follow this diagram.

I use the KDS PE create a project which is configuring the PEE mode,

I attach the project for your reference.

Have a great day,
Kerry

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Re: FRDMK22 enable PEE mode

claudiobrunelli — Wed, 29 Nov 2017 20:05:35 GMT

Hi Kerry.

Sorry the delay in answering you. I prefer don't use PE. But I'm going to try your suggestion to use PE generated code. I will write soon as I can try.

Thanks.

Claudio

Re: FRDMK22 enable PEE mode

kerryzhou — Thu, 30 Nov 2017 09:20:52 GMT

Hi Claudio,

PE code is just for your reference, you can don't use it, but just follow the code process write your own code.

Have a great day,
Kerry