Different Duty Cycle Clocks

[chulen 0]

Hi all, this is my first post in this forum. I am new to C programming and I managed to produce a variable frequency - variable duty cycle. I did it with the following code.

 

#include 

void main(void)
{
WDTCTL = WDTPW + WDTHOLD;  	// Stop WDT

BCSCTL1 = CALBC1_16MHZ;     // Set DCO to 16MHz
DCOCTL  = CALDCO_16MHZ;

P1DIR |= BIT2;             	// P1.2 to output
P1SEL |= BIT2;             	// P1.2 to TA0.1

CCR0 = 16-1;             	// PWM Period
CCTL1 = OUTMOD_7;          	// CCR1 reset/set
CCR1 = 1;                	// CCR1 PWM duty cycle
TACTL = TASSEL_2 + MC_1;   	// SMCLK, up mode

_BIS_SR(LPM0_bits);        	// Enter LPM0
}

 

However, I can't understand how to produce different duty cycle in different ends (same frequency). I will need about 5 different duty cycles.

Any ideas on how to solve this? Thanks in advance.

[Rickta59 589]

http://www.ti.com/lit/an/slaa513/slaa513.pdf

[chulen 0]

Thank you very much.

[chulen 0]

Hi again.

 

I'm having trouble with my MSP430G2553, as I want to have 6 different outputs. They all have to work at the same frequency, but the times at which they are on are different.

 

For instance, what I want is described in the attachment.

 

Is this possible? I have read that there are three registers for Timer A, but I have read that there are more timers such as Timer A1, and Timer B. Can I use these? If not, is there any possible way to get six signals out of the MSP?

 

Thanks a lot for your time.

[jsolarski-backup 22]

yes you can get 6 outputs, you can use a software pwm, or use a shift register. but look on this forum for controlling multiple servos. i would.link to it but I'm on my phone.

[gordon 229]

viewtopic.php?f=10&t=2207

viewtopic.php?f=10&t=2240

[pabigot 355]

And viewtopic.php?f=10&t=2274, just for completeness. The referenced bug in mspgcc has long been fixed.