#include <msp430f2011.h>
#define _XTAL_FREQ 20000000
unsigned int width=0;
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; //turn off the watch dog timer
DCOCTL = CALDCO_16MHZ; //set internal clock speed to 16 MHz
BCSCTL1 = CALBC1_16MHZ; //set internal clock speed to 16 MHz
P1DIR = BIT6;
P1SEL = BIT6; //TA1
TACCR0 = 40000; //2000000/40000 = 50hz = 20ms
TACCTL1 = OUTMOD_3; //set/reset
TACCR1 = width; //1.5ms pulse
TACTL = TASSEL_2 + MC_1 + ID_3; //up mode, SMCLK/8
while(1)
{
if(width<40000)
{
width = width+1;
}
else
{
width = 0;
}
TACCR1 = width;
__delay_cycles(100);
}
}
I need help with this PWM code,it produces a straight line in proteus simulation, maybe there is a problem with the while loop.
