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MSP430FR2476: MSP430FR2476

Michael Kegler
Prodigy 60 points
Part Number: MSP430FR2476


Tool/software:

Hello,

I would like to use the TIMER A3.0 as a PWM output. I have defined the following for this purpose:

void pwmTempLuefter(real outpwm) {

real vCCR0;

P4DIR |= BIT1;
P4SEL0 |= BIT1;

PM5CTL0 |=LOCKLPM5;

vCCR0 = 65500;
TA3CCR0 = (uint16)vCCR0;
TA3CCTL1 = OUTMOD_6; // CCR1 reset/set
TA3CCR1 = (uint16)(vCCR0*outpwm); // CCR1 PWM duty cycle ...Code

The PWM on TIMERB0, for example, works. What is different with TIMER A3.0?

Can anyone help me here?

  • 0
    Guru 100405 points

    You haven't set OUTMOD in TA3CCTL0, so you won't get a signal on TA3.0. It appears you're actually trying to generate PWM on TA3.1, which is on P4.0 [Ref Data Sheet (SLASEO7C) Table 9-26].

    TAx.0 is not very useful for PWM, since you're limited to 50% duty (OUTMOD=4) at half the frequency. [Ref User Guide (SLAU445I) Sec 13.2.5.1]

    --------------

    Unsolicited:

    > PM5CTL0 |=LOCKLPM5;

    This should be:

    > PM5CTL0 &= ~LOCKLPM5;

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