TMS320F28386S: CM CPUTIMER delays issue

Tool/software:

Good afternoon!

Please help me understanding:

I need a milliseconds delay routine for my project using CM core.

When I use DEVICE_DELAY_US(milliSeconds * 1000), the result seems to be reasonable. 

But when I am trying to use cpu timer to have more accurate delays, like this:

    CPUTimer_setPeriod(CPUTIMER2_BASE, (CM_CLK_FREQ / 1000) * milliSeconds - 1);
    CPUTimer_setPreScaler(CPUTIMER2_BASE, 0);
    CPUTimer_stopTimer(CPUTIMER2_BASE);
    CPUTimer_reloadTimerCounter(CPUTIMER2_BASE);
    CPUTimer_setEmulationMode(CPUTIMER2_BASE, CPUTIMER_EMULATIONMODE_RUNFREE);
    CPUTimer_startTimer(CPUTIMER2_BASE);
    CPUTimer_clearOverflowFlag(CPUTIMER2_BASE);
    while(!CPUTimer_getTimerOverflowStatus(CPUTIMER2_BASE));
    CPUTimer_stopTimer(CPUTIMER2_BASE);

The actual delay seems to be significantly shorter.

Where is the error?

UPDATE: I found the cause.

The SysConfig tool has an error, it ignores the CM CLK divider and alwais places the code in device.c:

    //
    // Set up CMCLK to use AUXPLL as the clock source and set the
    // clock divider to 1.
    //
    SysCtl_setCMClk(SYSCTL_CMCLKOUT_DIV_1,SYSCTL_SOURCE_AUXPLL);

regardless of the designated divider value.

So the CM core surprizingly runs at 250MHz.