topic S12G128 Overflow Interrupt Timer in S12 / MagniV Microcontrollers

S12G128 Overflow Interrupt Timer

rayhall — Mon, 15 Jun 2015 07:08:14 GMT

I have set up TIM with a overflow interrupt. The prescaler is set to precision. I want to set the overflow to exactly 10 msec. The prescaler does not give me a way to set to this time. It also seems that I cannot write to TCNT in the interrupt to control the next overflow time. How can I get the 10 msec I require.

Ray.

Re: S12G128 Overflow Interrupt Timer

ZhangJennie — Mon, 15 Jun 2015 08:33:52 GMT

Hi Ray,

attached is processor expert demo code for 10ms overflow interrupt.

in the sample, system clock is 6.25M

interrupt frequency is 6.25M/65536=95.367Hz that is around 10ms

can this help you?

Have a great day,
Zhang Jun

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Re: S12G128 Overflow Interrupt Timer

rayhall — Fri, 19 Jun 2015 09:16:01 GMT

Zhang Jun

Thank you.

Ray.

Re: S12G128 Overflow Interrupt Timer

ZhangJennie — Fri, 19 Jun 2015 09:19:47 GMT

Hi Ray,

you are welcome!

Have a great day,
Zhang Jun