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ISR for signal generation

Ioannis Pallis
Prodigy 170 points

Hello everybody,

I have a single question. In order to generate a sine signal according to the manual is it mandatory to call an interrupt routine (with lets say x kHz frequency)?

In the example folder of the signal generation library, which by the way I could not execute, there is no interrupt routine declared. It seems that the ipcb[i] matrix fills with no interrupt routine. 

So, do I have to declare and execute a timer interrupt in order to fill ipcb matrix with my prefered sine?

  • 0
    Guru 192875 points

    Hi,

    I have a single question. In order to generate a sine signal according to the manual is it mandatory to call an interrupt routine (with lets say x kHz frequency)?


    This depends on your application. According to me for complex applications timer routine is a must! Though you might've observed in sample codes that ISRs are not used but instead a for ever loop is present; this is because there is no other task other than generating signal.

    Regards,
    Gautam

  • 0 in reply to Gautam Iyer
    Prodigy 170 points

    Gautam Iyer said:

    Though you might've observed in sample codes that ISRs are not used but instead a for ever loop is present; this is because there is no other task other than generating signal.

    This is exactly what I cannot understand: with an absence of an ISR how can it fill the array with the signal's value? Because in the manual it is a obligatory to have an ISR with specific frequency in order to calculate the signal. But in the sample code there is no ISR.

    Thank you in advance for your interest!

  • 0 in reply to Ioannis Pallis
    Prodigy 60 points
    I have the same question, should I declare an isr and map it to the pievect, if so, which interrupts should I use? I saw some called user_isr. Thank you!