MSP430FR2355: How to generate PWM?

ArTzy

Mastermind 19050 points

Part Number: MSP430FR2355

Hi Experts,

Asking assistance for this query from Cx:

The code below fails to produce a PWM output on P5.1

What have I got wrong please?

/* MSP430FR2355 Setup PWM output on P5.1 which is assigned Timer B2.2 */

P5DIR |= (BIT1);

P5SEL0 |= (BIT1);

P5SEL1 &= ~(BIT1);

/*** Timer_B Set-Up ***/

TB2CCR0 |= 1000;

TB2CCR1 |= 500; // 50% duty cycle

TB2CCTL1 |= OUTMOD_7;

TBCTL |= TBSSEL_1 + MC_1;

This was wrong, but still no PWM output:
P5SEL0 = 1;
P5SEL1 = 0;

Thank you.

Regards,
Archie A.

over 3 years ago

0 Kyle Holub over 3 years ago

TI__Prodigy 570 points

Hi Archie,

Can I see your main and source files? You can email them to me at k-holub@ti.com if that is easier.

Sincerely,

Kyle Holub

0 Bruce McKenney over 3 years ago

Guru 100785 points

TB2CCR1 |= 500; // 50% duty cycle

TB2CCTL1 |= OUTMOD_7;

TB2.2 refers to TB2CCR2/CCTL2. Try:

TB2CCR2 |= 500; // 50% duty cycle

TB2CCTL2 |= OUTMOD_7;

+1 Kyle Holub over 3 years ago

TI__Prodigy 570 points

Hi Archie,

I sent you an email, I unfortunately wasn't able to see your code. However, I believe that this example code will be super helpful for the customer, with trying to produce a PWM output. They should be able to adapt the code as they see fit. Let me know if this is helpful, or if you have any other questions.

https://dev.ti.com/tirex/explore/node?devices=MSP430FR2355&node=AMJg2x6HYh8v9B2JqWFkKw__IOGqZri__LATEST

Sincerely,

Kyle Holub

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MSP430FR2355: How to generate PWM?