// To illustrate the speed of the reset time the LED flashes in accordance // of the selected interval.. Grewal // Texas Instruments Inc.
Trang 1//****************************************************************************** // MSP430G2xx1 Demo - WDT+ periodic reset
//
// Description; Various reset intervals are configured in watchdog mode
// To illustrate the speed of the reset time the LED flashes in accordance // of the selected interval
//
// ACLK = 32khz, MCLK = SMCLK = default DCO
//
//
-// /|\|
XIN|-// | | |
// |RST
XOUT|-// | |
// | P1.0| >LED
//
// R B Elliott / H Grewal
// Texas Instruments Inc
// April 2010
// Built with IAR Embedded Workbench Version: 3.42A
//******************************************************************************
#include <msp430g2231.h>
void main(void)
{
// WDT is clocked by fSMCLK (1MHz) WDTCTL = WDT_MRST_32; // ~32ms interval (default)
//WDTCTL = WDT_MRST_8; // ~8ms
//WDTCTL = WDT_MRST_0_5; // ~0.5ms
//WDTCTL = WDT_MRST_0_064; // ~0.064ms
// WDT is clocked by fACLK (32KHz) //WDTCTL = WDT_ARST_1000; // 1000ms
//WDTCTL = WDT_ARST_250; // 250ms
//WDTCTL = WDT_ARST_16; // 16ms
//WDTCTL = WDT_ARST_1_9; // 1.9ms
P1DIR |= 0x01;
P1OUT ^=0x01;
_BIS_SR(LPM0_bits + GIE); // Enter LPM3 w/interrupt
}