Hi all,
I try to test the watchdog functionnality coupled with the lmp3.
here my code. I would like to have the maximum time that i can sleep in a msp430. I’m new to this micro. Here what i have up to now.
#include <msp430.h>
void main(void)
{
DCOCTL = 0x00;
BCSCTL1 = 0x00 | (XT2OFF | DIVA_3); // ACLK/8
BCSCTL2 = 0x00 | (SELM_3 | SELS);
BCSCTL3 = 0x00 | (XCAP_3);
WDTCTL = WDT_MDLY_32; // WDT 32768 with SMCLK as source
IE1 |= WDTIE; // Enable WDT interrupt
P1DIR = 0xFF; // All P1.x outputs
P1OUT = 0; // All P1.x reset
P2DIR = 0xFF; // All P2.x outputs
P2OUT = 0; // All P2.x reset
int i;
while(1)
{
P1OUT |= 0x01; // Set P1.0 LED on
for (i = 5000; i>0; i–); // Delay
P1OUT &= ~0x01;
_BIS_SR(LPM3_bits + GIE); // Enter LPM3
}
}
#pragma vector=WDT_VECTOR
__interrupt void watchdog_timer (void)
{
_BIC_SR_IRQ(LPM3_bits); // Clear LPM3 bits from 0(SR)
}
With this code, the watch dog is not fired. But i use
WDTCTL = WDT_ADLY_1000; (ACLK) it’s work.
I have plugged an 32K oscillator to external pins.
what is wrong with this code.
Jonathan