msp430f149_WatchDog.zip_MSP430 例程_MSP430 看门狗_eww 5151淫_eww937_m

//****************************************************************************** // MSP-FET430P140 Demo - WDT, Toggle P3.4, Interval Overflow ISR, 32kHz ACLK // // Description: Toggle P3.4 using software timed by WDT ISR. Toggle rate is // exactly 250ms based on 32kHz ACLK WDT clock source. In this example the // WDT is configured to divide 32768 watch-crystal(2^15) by 2^13 with an ISR // triggered @ 4Hz. // ACLK= LFXT1= 32768, MCLK= SMCLK= DCO~ 800kHz // //* External watch crystal installed on XIN XOUT is required for ACLK *// // // MSP430F149 // ----------------- // /|\| XIN|- // | | | 32kHz // --|RST XOUT|- // | | // | P3.4|-->LED // // Dasheng // LiTian Electronic Inc. // Feb 2008 // Built with IAR Embedded Workbench Version: 3.42A //****************************************************************************** #include <msp430x14x.h> void main(void) { P6DIR |= BIT2;P6OUT |= BIT2; //关电平转换 WDTCTL = WDT_ADLY_250; // WDT 250ms, ACLK, interval timer IE1 |= WDTIE; // Enable WDT interrupt P3DIR |= BIT4; // Set P3.4 to output direction _BIS_SR(LPM3_bits + GIE); // Enter LPM3 w/interrupt } // Watchdog Timer interrupt service routine #pragma vector=WDT_VECTOR __interrupt void watchdog_timer(void) { P3OUT ^= BIT4; // Toggle P3.4 using exclusive-OR }