Where can I find the NVIC registers to use interrupts with the MK53DN512xxx10?

[kev1504]

Hi there,

I am currently developing a little program to toggle GPIO pins. I am using KDS 3.0 and KSDK 1.2 with the TWR-K53N512 board. I am quite new in working with Freescale's MCUs. To toggle a GPIO pin is no problem but to time it with an interrupt is more complex. I want to use the LPTMR0 for this purpose.

My colleague gave me some code he used with another Freescale MCU and CW. Here is the part that makes problems:

static void IRQ_enable(uint32_t irq)

{

uint32_t div;

// Enable IRQ in NVIC

div = irq / 32u;

switch(div)

{

  case 0u:

      NVIC_ICPR0 |= 1 << (irq % 32u);

      NVIC_ISER0 |= 1 << (irq % 32u);

      break;

  case 1u:

      NVIC_ICPR1 |= 1 << (irq % 32u);

      NVIC_ISER1 |= 1 << (irq % 32u);

      break;

  case 2u:

      NVIC_ICPR2 |= 1 << (irq % 32u);

      NVIC_ISER2 |= 1 << (irq % 32u);

      break;

}

}

The problem is I do not find the NVIC registers. I know they are there according to the ARM website but they are not in the MK53D10.h file and there is no sysinit.h. The compiler, of coarse, says NVIC_ISER0 etc. are not declared. Anyone can help me? I guess its a simple solution. Thanks in advance!

Regards,

Kevin

[ZhangJennie]

Hi,

Nested Vectored Interrupt Controller( NVIC) is ARM register.

you can find the definition in attached document. search the doc with keyword "NVIC" you will know.

if you use KDS3.0, you can also view NVIC in debugger:

can this help?

Have a great day,
Zhang Jun

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[kev1504]

Hi,

thanks for your answer! But that is the problem. Look at my embsys table:

Its missing and I dont know why :smileysad:

Regards,

Kevin

[ZhangJennie]

hi

1. are you sure your KDS version is 3.0. please check

is your side the same as below?

please make sure you use the latest version

Kinetis Design Studio Integrated Development |Freescale

2. did you do the same setting as below?

Have a great day,
Zhang Jun

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[ZhangJennie]

In Eclipse, use the menu Help > Install New Software and use the following update site:

http://embsysregview.sourceforge.net/update

Have a great day,
Zhang Jun

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[kev1504]

Everything is the same except I have a newer Version of embsys (0.2.5). And that is not the problem.

The problem is not that I cannot see it in embsys but its missing in my header files (MK53D10.h etc.). They dont exist. Neither NCIVISER2 nor NVIC_ISER2 are declared, you know?

Maybe I have manipulated files but they are from KSDK...

Thanks for all your help.

Kevin

[ZhangJennie · Accepted solution]

in KDS, NVIC related core registers are defined in core_cm4.h.

by default, it is under project\SDK\platform\CMSIS\Include

can you please take a look at it?

Have a great day,
Zhang Jun

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[kev1504]

Finally I solved the problem. You were right. I am just using the declared NVIC_IRQenable/disable functions from core_cm4.h now.

Thanks for all your support!

Have a nice weekend,

Kevin

[kev1504]

They are there but in a different way. I gonna try these functions. Anyway the whole thing is mysterious.

Thanks!

Kevin