MCUXpressco - FTM0 for delay function doesn't work

[tonytao]

Hi,

I am doing a project with MCUXpressco IDE and MK22FN512VLH12 MCU. and the FTM0 for delay function doesn't work.

please see attached Clock setting, FTM0 setting and Code.

Did I missing something?

thanks for the help.

[tonytao]

So far, at least base on my knowledge, the SDK for MK22F family MCU doesn't support CPP well. I can use SDK examples to learn to make my C project, but I can't make my CPP project in a similar way.

[Hui_Ma]

Hi,

Please check if FTM0 counter start working. There missing FTM0 initialization code and start timer called：

 FTM_StartTimer(BOARD_FTM_BASEADDR, kFTM_SystemClock);

Wish it helps.

Have a great day,
Mike

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[tonytao]

Hi Mike,

Please see attached pictures, there are cames from two project, one is FTM working and another one not.

All hardware condition are same. Clock seting are same.

Hope this information may help.

Kind regards,

Tony Tao

Engineering Technician

AXYZ Automation Inc.

(905) 634-4940 Ext. 262

[Hui_Ma]

Hi Tony,

Please check the FTM0_SC register value for working project vs. non-working project.

best regards,

Mike

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[tonytao]

Hi Mike,

Please see attached pictures.

Kind regards,

Tony Tao

Engineering Technician

AXYZ Automation Inc.

(905) 634-4940 Ext. 262

[Hui_Ma]

Hi,

From FTM0 register, the counter starts working and TOF(timer overflow flag) is set. Then, the interrupt should be entered.

In general, I checked the SDK demo FTM0 interrupt service routine default named is FTM0_IRQHandler.

So, please check the project and make sure using below two interrupt definitions:

FTM0_IRQn  &  FTM0_IRQHandler

Otherwise, the FTM0 interrupt service routine will never entered.

Below is an example for your reference:

/* Interrupt number and interrupt handler for the FTM instance used */
#define BOARD_FTM_IRQ_NUM FTM0_IRQn
#define BOARD_FTM_HANDLER FTM0_IRQHandler

Have a great day,
Mike

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[tonytao]

Hi Mike,

Appreciate your effort, that is the tough part.

Please see the attached pictures. All those pictures come from a non-working project.

FTM0 Registers.JPG: FTM0 is working.

Main.jpg: Interrupt handler is not working.

Peripherals Head file.jpg: it defined FTM0_IRQn & FTM0_IRQHANDLER already. But I used FTM0_IRQHandler directly.

Interrupt print.jpg: Add the printf in the interrupt handler, to make sure the code does not get in the handler at all.

#define added.jpg: even I added the define in the code, it still not working.

I imported the SDK example code, and it is working!

But any new project I created had a problem with FTM0. I do want to create a CPP project, but the example code is a C project……

Kind regards,

Tony Tao

Engineering Technician

AXYZ Automation Inc.

(905) 634-4940 Ext. 262

[Hui_Ma]

Hi,

For you could run SDK demo without any problem, there shows the hardware working.

Then it need to check the software code.

I think that could be registers setting difference cause the issue.

I abstracted the working projects FTM0 registers and core NVIC registers values for your reference:

Please check if your C++ project also has the similar values of those registers.

Wish it helps.

Have a great day,
Mike

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[tonytao]

Hi Mike,

Thanks for your responding.

Unfurturnly, the FTM0 still not working. Detail please see attached screen captures.

Kind regards,

Tony Tao

Engineering Technician

AXYZ Automation Inc.

(905) 634-4940 Ext. 262