• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 79 subscribers
  • Views 152 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP-EXP430FR2433: why multiply to 0.97

Yale Li 李耀先
Expert 4660 points
Part Number: MSP-EXP430FR2433

Hi Team,

https://dev.ti.com/tirex/content/msp_academy_msp430_1_00_06_29/modules/msp430/msp430_timer_capture_training/msp430_timer_capture.html

signalFreq = (1000000 / sum) * 0.97; //calculate frequency (SMCLK/difference)

In this code, why multiply to 0.97?

Thanks & Regards

Yale Li

  • +1
    TI__Genius 10070 points

    Hi Yale,

    It looks like the multiplication by 0.97 was added in order to bring the achieved signal frequency value closer to the real frequency value of the input signal. Lots of small things with using the debugger can cause slight inaccuracies, and the developer of the example likely just included it for the sake of making the result in the demonstration more accurate. In my opinion the multiplication by 0.97 is not something that needs to be taken into account or utilized in your designs. If anything, you may want to insert a different  adjustment factor in order to end with the most accurate reading.

  • 0 in reply to Dylan OBrien
    TI__Expert 4660 points

    Hi Dylan,

    Thanks for your answer.

    Best Regards,

    Yale Li

**Attention** This is a public forum