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MSP430 Launchpad

d0v
Prodigy 50 points

Other Parts Discussed in Thread: MSP430G2553

Hi All,

Can I get 3 PWM output with this launchpad :http://www.ti.com/ww/en/launchpad/launchpads-msp430-msp-exp430g2.html#tabs using the timers?

How may timers do I need to get 3 PWM outputs?

Are there some code examples how to do that?

And what about that uC http://www.ti.com/product/msp430l092 , it hat 2 timers is that enough to generate 3 PWM signals to control 3 LED diodes?

Regards.

 

  • 0
    Guru 46710 points

    Current G2 launchpad have msp430g2553. If we take in account this, then answer is yes, on g2553 you can have not only 3 LED PWM channels but 6 :)

    Here's product in action :)

  • 0 in reply to Ilmars
    Guru 227245 points

    Ilmars said:
    on g2553 you can have not only 3 LED PWM channels but 6 :)

    Make that 4 (2*2) if you want to have some control over the PWM frequency (for each pair separately then). Else you are stuck to a full 65536 timer ticks cycle length.

  • 0 in reply to Jens-Michael Gross
    Guru 46710 points

    Jens-Michael Gross said:
    Make that 4 (2*2) if you want to have some control over the PWM frequency (for each pair separately then). Else you are stuck to a full 65536 timer ticks cycle length.

    That's my point that they made 6 channels out of hardware that seemingly have limited hardware resources. Key here is "just enough" PWM resolution and calculated compromises, if any. You can run software PWM without CCR PWM output, using CCR IRQ with GPIO output wisely

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