MC_PMSM :: /* initial value of the FTM counter */

[amerzater]

Can I ask what is the meaning of the minus operator (-)at defining the initial value of FTM0 for generating 3phase PWM signals at MC_PMSM library?

what does it mean?

Simply, the initial value of FTM0 should be assigned to  ui16PwmModulo / 2 ...not to (-ui16PwmModulo / 2 )

/* initial value of the FTM counter */
FTM0->CNTIN = (uint32_t)(-g_sClockSetup.ui16PwmModulo / 2);

[Hui_Ma]

Hi,

I debug the PMSM demo with FRDM-KV10Z board and get below result:

The FTM0 CnV registers value is:

You could find the function of  '-' is to bit inversion of variable value.

0xF8AE is bit inversion of 0x752 of 16 bit variable.

Wish it helps.

Have a great day,
Mike

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