topic Re: Combined PWM Generation on FTM2 in Motor Control and Smart Energy

Combined PWM Generation on FTM2

_daniel_ — Sat, 05 Nov 2016 21:00:15 GMT

Hello, please;

How I could do to configure FTM2 module of the MKE02Z64 microcontroller to generate a combined PWM signal (complementary + deadtime) in channels 0 and 1, approximately 25kHz? So many registrars who I got confused, do not know where to start. There is a "cake recipe"/tutorial of the following steps one-a-one, or a component for Processor Expert?

Thank you.

Re: Combined PWM Generation on FTM2

xiangjun_rong — Fri, 11 Nov 2016 08:08:55 GMT

Hi, Daniel,

If you do not need asymmetric PWM signal, you do not need the COMBINED mode, it is okay to use just complementary mode to generate the complementary PWM signals with deadtime..

You can download FTM example from the link based on KE family.

ARM Cortex-M0+|Kinetis KE02 40 MHz 32-bit 5V MCUs|NXP

at the end of the web page, pls download "PExDrv 10.3 Kinetis KE02 40MHz Service pack", you can see the FTM example.

XiangJun Rong

Re: Combined PWM Generation on FTM2

tommyliu — Mon, 14 Nov 2016 15:17:57 GMT

Dear Mr. Rong,

I can't find the FTM example. could you help add a .Zip file of FTM example.

Many thanks.

Re: Combined PWM Generation on FTM2

_daniel_ — Mon, 14 Nov 2016 22:26:59 GMT

Hello; Unfortunately I could not install the package, an error is displayed.

Details:
Can not complete the install because one or more required items could not be found.
Software being installed: Microcontrollers Driver Suite for Kinetis 48MHz KE02 1.0.0 (com.freescale.processorexpert.ke02.sp.feature.group 1.0.0)
Missing requirement: Microcontrollers Driver Suite for Kinetis 48MHz KE02 1.0.0 (com.freescale.processorexpert.ke02.sp.feature.group 1.0.0) requires 'com.freescale.processorexpert.standalone.feature.group 10.3.0' but it Could not be found

Where could I find him?

Installed Products:
- CodeWarrior for MCU
Version: 10.7
Build Id:160721

Re: Combined PWM Generation on FTM2

xiangjun_rong — Tue, 15 Nov 2016 07:08:50 GMT

Hi,

I attach the driver, the example is located at:C:\DriverE\Freescale\kexx_drv_lib\build\cw\ke02\FTM_EPWM_demo

Hope it can help you.

Xiangjun Rong

Re: Combined PWM Generation on FTM2

tommyliu — Tue, 15 Nov 2016 15:46:55 GMT

Dear Mr. Rong,

:C:\DriverE\Freescale\kexx_drv_lib\build\cw\ke02\FTM_EPWM_demo

this example is not based on PE or PDD. Could you give us some FTM example based on PE?

I remember PE for DSC products can provide PWMMC. PWMMC is very useful for motor control.

but in Kenitis, i can't use PWMMC component :smileysad:

Many thanks

Re: Combined PWM Generation on FTM2

kerryzhou — Mon, 21 Nov 2016 07:15:57 GMT

Hi Tommy,

If you want to use the PE component, you can use the init_FTM component.

I already help you to create a project based on CW PE, please find my project on the attachment.

The PTC0 and PTC1 is the combined FTM pin, these pin can output 25Khz PWM wave.

Wish it helps you!

Have a great day,
Kerry

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Re: Combined PWM Generation on FTM2

Jiandong_li — Mon, 21 Nov 2016 10:14:07 GMT

Dear Kerry,

Many thank:smileyhappy:

Re: Combined PWM Generation on FTM2

tommyliu — Mon, 21 Nov 2016 16:16:40 GMT

Dear Kerry，

万分感谢。

此外，贵司的一个例程里面，channel value为负值，不是很理解。计数时，是由负数->0->正数这样吗？

还望多多指点！

uint32_t ChanValTop = (-1800 / 2) + ((-1800 * torque) / 200);
uint32_t ChanValBottom = -(-1800 / 2) - ((-1800 * torque) / 200) - 1;

FTM_PDD_WriteChannelValueReg(FTM0_DEVICE, FTM_PDD_CHANNEL_0, ChanValTop);
FTM_PDD_WriteChannelValueReg(FTM0_DEVICE, FTM_PDD_CHANNEL_1, ChanValBottom);
FTM_PDD_WriteChannelValueReg(FTM0_DEVICE, FTM_PDD_CHANNEL_2, ChanValTop);
FTM_PDD_WriteChannelValueReg(FTM0_DEVICE, FTM_PDD_CHANNEL_3, ChanValBottom);
FTM_PDD_WriteChannelValueReg(FTM0_DEVICE, FTM_PDD_CHANNEL_4, ChanValTop);
FTM_PDD_WriteChannelValueReg(FTM0_DEVICE, FTM_PDD_CHANNEL_5, ChanValBottom);
FTM_PDD_WritePwmLoadReg(FTM0_DEVICE, 0x200);

Re: Combined PWM Generation on FTM2

kerryzhou — Tue, 22 Nov 2016 01:17:43 GMT

Hi Tommy,

请问你的这个例程是从哪里下载的？

请给我个链接，我去看看。

Kerry