Kinetis MicrocontrollersのトピックRe: Re: How to use the FTM for CPWM output?

How to use the FTM for CPWM output?

changkenta — Thu, 19 Dec 2013 08:59:01 GMT

Hello,

I want to use the FTM for 6 channel CPWM output for 3-phase motor control, and on the MK60DN512VLL10 datasheet and reference manual do not show it. Is there any document for me to know How to setting the FTM to generate 6 channel CPWM output?

Regards,

Kenta

Re: How to use the FTM for CPWM output?

kerryzhou — Thu, 19 Dec 2013 09:37:32 GMT

Hi Kenta,

Please find the application note in the attachments, maybe it is useful to you!

By the way, there has another post:K60 PWM phase? for your reference!

Wish it helps you!

Best regards!

Jing

Re: How to use the FTM for CPWM output?

changkenta — Fri, 20 Dec 2013 07:53:52 GMT

Hi Jingjing,

Thanks.

by the way, I hope to setting FTM generate 6 channel CPWM output by Processor Expert, but do not succeed.

please let me know How to do it?

Regards,

kenta

Re: Re: How to use the FTM for CPWM output?

kerryzhou — Fri, 20 Dec 2013 09:22:45 GMT

Hi Kenta,

I create a project base on TWR-K60D100M, and use the PE, choose init_FTM component .

Now in my project, I configure 2 channels, and test OK, you can refer to it, and create the other 4channels.

My configuration is as follows, please find my project from the attachments.

The test result is :

Wish it helps you!

If you still have question, please contact me!

Thank you and best regards!

Jing

Re: How to use the FTM for CPWM output?

changkenta — Mon, 23 Dec 2013 01:57:21 GMT

hi Jingjing,

thanks. I can setting FTM to generate CPWM output.

next, I want to study hot to update the PWM-duty for Sine PWM algorithm?

Regards,

Kenta

Re: How to use the FTM for CPWM output?

kerryzhou — Mon, 23 Dec 2013 03:10:53 GMT

Hi Kenta,

About how update the PWM-duty for sine PWM algorithm, please find it in the AN3729 which I already give you!

chapter 3.2 sine wave generation.

By the way, this AN maybe help you too, the link is :

http://cache.freescale.com/files/microcontrollers/doc/app_note/AN4429.pdf?fromsite=zh-Hans

Best regards!

Jing

Re: How to use the FTM for CPWM output?

changkenta — Mon, 23 Dec 2013 07:34:01 GMT

hi Jingjing,

thanks for your share.

I found, I can not update the FTM0_CnV in PE_ISR(FTM_OVER). could you please let me know: How to update the FTM0_C0V, FTM0_C1V?

Regards,

Kenta

Re: Re: How to use the FTM for CPWM output?

kerryzhou — Tue, 24 Dec 2013 01:54:32 GMT

Hi Kenta,

I already try it, the PWM-duty can be changed in the interrupt function. Of course, this method is not work in PWM synchronization.

I don't know how you to update the FTM0_C0V. I use the following code. you can try it!

/* User includes (#include below this line is not maintained by Processor Expert) */

PE_ISR(FTM_OVER)

{

// NOTE: The routine should include actions to clear the appropriate

// interrupt flags.

FTM0_SC &= ~FTM_SC_TOF_MASK;

FTM0_C0SC &= ~FTM_CnSC_CHF_MASK ;

FTM0_C1SC &= ~FTM_CnSC_CHF_MASK ;

/* FTM0_C0V: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,VAL=0x05DC */

FTM0_C0V = FTM_CnV_VAL(0x05DC);

/* FTM0_C1V: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,VAL=0x05DC */

FTM0_C1V = FTM_CnV_VAL(0x07D0);

}

In this code, I just change the FTM0_C1V from 1500(0x05DC) to 2000(0x07D0), and the result is as follows, you will find the duty of C1 is changed.

If you still have question, please contact with me!

I wish my answer is useful to you!

Best regards!

Jingjing

Re: How to use the FTM for CPWM output?

changkenta — Tue, 24 Dec 2013 02:47:48 GMT

hi Jingjing,

Yes, do not work in PWM sync.

I follow your code, and FTM0_C0V is updated.

thank you.

another Question is: I Do not know How to setting K60 after power on reset, immediately Run the code?

please let me know ...

Regards,

Kenta

Re: How to use the FTM for CPWM output?

kerryzhou — Tue, 24 Dec 2013 03:48:20 GMT

Hi Kenta,

Could you describe your question in details?

What do you want to setting?

Regards,

Jingjing

Re: How to use the FTM for CPWM output?

changkenta — Tue, 24 Dec 2013 04:37:00 GMT

hi Jingjing,

I found that after I download the code into K60, and power Off the K60 board, then re-power On the K60 board, the K60 do not Run the code.

is this the power On reset setting issue ?

Regards,

Kenta

Re: Re: How to use the FTM for CPWM output?

kerryzhou — Tue, 24 Dec 2013 05:13:54 GMT

Hi Kenta,

Please configure like this picture:

make sure in Flash, not in RAM.

Then download the code.

Wish it helps you!

Best regards!

Jingjing

Re: How to use the FTM for CPWM output?

changkenta — Tue, 24 Dec 2013 06:28:37 GMT

hi Jingjing,

follow the Flash configure, ... the code is Running after power On.

thank you so much.

Regards,

Kenta

Re: How to use the FTM for CPWM output?

kerryzhou — Wed, 25 Dec 2013 01:07:41 GMT

Hi Kenta,

If your question is solved, could you mark your question as solved?

Thank you very much!

Jingjing

Re: How to use the FTM for CPWM output?

changkenta — Wed, 25 Dec 2013 09:07:44 GMT

hi Jingjing,

Yes, but I am a new guy, please let me know How to mark my question is solved?

Regards,

Kenta

Re: How to use the FTM for CPWM output?

kerryzhou — Thu, 26 Dec 2013 01:05:11 GMT

Hi Kenta,

You already done it!

Just mark the correct answer!

Thank you very much!

Best regards!

Jingjing