Kinetis Design StudioのトピックRe: Interrupts, timers and frequency with PE

Interrupts, timers and frequency with PE

alexismaslyczyk — Thu, 28 Jan 2016 17:12:37 GMT

Hi everyone,

as usual I'm confused and not able to find solution on web or datasheet.

I'm using the TWR-KV58F220M with KDS 3.0 and Processor Expert.

I just want to create one interrupt at 1000Hz.

When I look tutorial like this:

http://mcuoneclipse.com/2012/08/13/tutorial-timer-led-with-processor-expert-for-kinetis/

They use the component Timer, but on my project I didn't have any Timer component. What should I use?

I got the component InterruptManager but it's empty in the Inspector:

Second question what should I use if I want to use timers in my code? (like start a timer, do something, stop timer and see how long my code was)

Third question, how can I know that my TWR-KV58F220M is running at 220Mhz? where we can change the frequency

Last question, when I do calculation with float, the floating point unit is directly used in the processor?

Thank you for all these answers.

TWR-KV58F220M

Re: Interrupts, timers and frequency with PE

Alice_Yang — Fri, 29 Jan 2016 02:47:13 GMT

Hello alex,

- You can use the component of "fsl_pit" or "fsl_ftm"

- After you configure the fls_pit or fsl_ftm component, you will find the Methods that

using the timer:

- About the chip clock , please refer to the Reference Manual -> Figure 6-1. Clocking diagram , you can refer to the section to

configure the related register to change the frequency of your chip.

And if you want check the real frequency of the chip , you can check from the PTC3 pin :

from the register of SIM_SOPT2-> CLKOUTSEL to select the clock to output on thePTC3pin , about the detail

you can check the introduce of this register.

Hope it helps

Have a great day,
Alice Yang

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