Setting FBI mode with SDK

[pietrodicastri]

Good morning

I try to execute this call with different values of fcrdivVal, the fourth parameters in the function.

    CLOCK_HAL_SetFbiMode(MCG_BASE, kMcgDcoRangeSelMid, kMcgInternalRefClkSelFast, 5, CLOCK_FllStableDelay, &outClkFreq );

It execute correctly with values from 0 to 5. The clock is 125 KHz with a value of 5.

If the fcrdivVal is 6 the clock is updated (32KHz), I see on the scope as CLOCKOUT, but the debugger looses the control.

Is it normal???

Solutions???

Thank You

[pietrodicastri]

Hi ..

I am still interested in some assistance.

Thank You

Pietro

[ivadorazinova · Accepted solution]

Hi Pietro,

Why do you change the divider when you use the FBI?

If you go to Reference Manual, page 593

http://cache.freescale.com/files/microcontrollers/doc/ref_manual/K64P144M120SF5RM.pdf

so, the value for fcrdivVal = 6, output frequency cannot be 32KHz.

Because when the value is 5, 4MHz and Divide Factor is 32, is 125KHz. It is right.

BUT: when is the value 6, 4MHz and Divide Factor is 64, it is 62,5KHz, not 32KHz.

(4MHz : 64 = 62,5KHz)

As it is written in the Reference Manual : you have not change the divider when the Fast IRC is enabled. 

Please, look to SIM Module, Register SIM_CLKDIV1->OUTDIV4 what is your frequency divider for flash memory.

Best Regards,

Iva

[pietrodicastri]

Hi Iva

Yes I should not divide in such condition. That's a good point.

Thank You

[pietrodicastri]

Hi Iva

Sorry. I will detail..

KDS Version: 2.0.0

SDK 1.1.0

Thank You

[xiangjun_rong]

Hi, Pietro,

Can you tell me the part number of the Kinetis and the version of SDK?

BR

XiangJun Rong

[pietrodicastri]

Thank You for assistance

I am using the FRDM K64. I am debugging with the JTAG, in reduced version with only the two pins, as in the schematic.

I use the KDS.

I am suspicious the slow clock is not handled in this reduced JTAG connection...

Let me know

Best Regards

Pietro di Castri

[ivadorazinova]

Hi Pietro,

like Rong said, we need exact information about versions, which you use.

KDS is IDE, Kinetis Design Studio and KSDK is Kinetis Software Development Kit.

You can find it on C:\Freescale and folders KDS_2.0.0 and KSDK_1.1.0.

Iva