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TIMER A (engl)
Gast
#40238
interrupt(TIMERA0_VECTOR) TMR0int(void){
P1OUT = 0x01;
}
void main(void){
TACTL = TAIE | TACLR | ID_3 | TASSEL_SMCLK;
TACCR0 = 0xFF0;
TACCTL0 = CCIE;
TACTL |= MC_CONT;
for(;;){
P1OUT = 0x0;
}
}
In above code the LED (P1.pin1) should flash off almost all the time.
Why in my case it is ON.
I ahve no idea
robert
rseku@poczta.onet.pl
Gast
#40239
Hi Robert, how is the LED connected to MSP430? Lightning on L-signal at P1.1? What MCLK/SMCLK is used for operation? Do you have debuged the application? Is TMR0int called from time to time? If you only want to flash the LED, try PWM-Output of timer A. No interrupt service routine will be needed for this. Greetings, Claus
Gast
#40240
Thanks! The code is an simplified example of large piece. I already figured out one thing which is wrong: TAIE is overflow interrupt, which is unnessasary in this case. (We need only compare). Also MC_CONT should be changed to MC_UP mode. It is not said in documentation, but looks, that OVERFLOW interrupt bit should be cleared by software, as well as CCIFG1 and 2 Antwort schreiben |
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