Clock Problem on MKV58

softwaretestsof — Thu, 26 Sep 2019 12:18:39 GMT

Hello,

I am having a trouble with MKV58 clock configuration.

I have a TWR Board and MCU expresso IDE.I simply running "lwip tcp/echo bare metal" example
without an issue.

However,In my custom board,the example simply stucks in

" BOARD_BootClockRUN();"
-CLOCK_BootToPeeMode(kMCG_OscselOsc,
kMCG_PllClkSelPll0,
&mcgConfig_BOARD_BootClockRUN.pll0Config);
-CLOCK_SetPbeMode(pllcs, config);
-while ((MCG->S & (MCG_S_IREFST_MASK | MCG_S_CLKST_MASK)) !=
(MCG_S_IREFST(kMCG_FllSrcExternal) | MCG_S_CLKST(kMCG_ClkOutStatExt)))

I ve tried to run "Engaded Internal Clock Modes" without an issue,but when it comes to
run "Engaded External Clock" modes it simply stucks.

In my custom board I have a 50Mhz oscillator which is connected to EXTAL Pin of mcu.
I observed TWR board and my custom board oscillator inputs,both are the same.

if i comment

-while ((MCG->S & (MCG_S_IREFST_MASK | MCG_S_CLKST_MASK)) !=
(MCG_S_IREFST(kMCG_FllSrcExternal) | MCG_S_CLKST(kMCG_ClkOutStatExt)))

and

/* Disable PLL first, then configure PLL. */
MCG->C6 &= ~MCG_C6_PLLS_MASK;
while (MCG->S & MCG_S_PLLST_MASK)
{
}

application gives error in my custom board at

- MCG->C6 |= MCG_C6_PLLS_MASK;

However, it doesnt happen on TWR Board at all!

So,my questions are,

-Do i miss something to make clock configuration using Clock Config Tools ?
-What could be the issue ?
-What else do i need to check ?

King Regards.

Re: Clock Problem on MKV58

nxf56274 — Fri, 27 Sep 2019 02:21:02 GMT

Hi,

I suggest you should use oscilloscope to measure if the external crystal oscillator has the normal wave.

Re: Clock Problem on MKV58

softwaretestsof — Thu, 03 Oct 2019 13:07:10 GMT

Hi Da Li

We found the problem.We have measured the clock signal and it was Ok.

We have spot that the MKV58 EXTAL Pin was not soldered properly.

Thanks.

King Regards

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