Are there any more examples of PWM on the TWR-KV58F?

edgardnetz — Sun, 28 Jul 2019 08:56:20 GMT

I'm using Mcuxpresso and have downloaded the corresponding SDK for this board,

when loading the PWM driver example all I get is three pwm outputs with 25 50 and 75 duty cycle all in phase, which is curious since the example says 3ph PWM.

I understand that I have to modify the VALx registers, but in the example no matter what you do all of these registers are always set to zero.

This is the only page in the reference manual about phase shifted PWMs

Can someone please point me to a good reference on this?

Thank you.

Re: Are there any more examples of PWM on the TWR-KV58F?

xiangjun_rong — Mon, 29 Jul 2019 06:09:51 GMT

Hi,

Unfortunately, I have not the phase-shift code for eFlexPWM module based on KV58, but i have the code for DSC, I think you can refer to it.

But you have to modify the code. Before you write any eFlexPWM registers, you have to enable the gated clock of eFlexPWM.

//enable PWM0 clock
SIM_SCGC4|=0xF000000;

write the pin assignment

void pinsAssignment(void)
{
   //PTD14:PWM0_A0
   //PTD15:PWM0_B0
   //PTD12:PWM0_A1
   //PTD13:PWM0_B1
   //PTD10:PWM0_A2
   //PTD11:PWM2_B2

   //enable PORTD gated clock
   SIM_SCGC5|=0x1000;
   //set PTE MUX ALT5
   PORTD_PCR14&=~(0xF00);
   PORTD_PCR14|=(ALT6);

PORTD_PCR15&=~(0xF00);
PORTD_PCR15|=(ALT6);

PORTD_PCR12&=~(0xF00);
PORTD_PCR12|=(ALT6);

PORTD_PCR13&=~(0xF00);
PORTD_PCR13|=(ALT6);

PORTD_PCR10&=~(0xF00);
PORTD_PCR10|=(ALT6);

PORTD_PCR11&=~(0xF00);
PORTD_PCR11|=(ALT6);
}

For the PWM initialization, I attach the main.c which is based on the DSC, but the registers are the same.

Kinetis Microcontrollers中的主题 Are there any more examples of PWM on the TWR-KV58F?

Are there any more examples of PWM on the TWR-KV58F?

Re: Are there any more examples of PWM on the TWR-KV58F?