【文章內(nèi)容簡(jiǎn)介】 / Feb 2008// Built with IAR Embedded Workbench Version: //******************************************************************************include include void main(void){ BoardConfig(0xb8)。 WDTCTL = WDTPW + WDTHOLD。 // Stop watchdog timer P3DIR |= BIT4。 // Set to output direction for (。) { volatile unsigned int i。 P3OUT ^= BIT4。 // Toggle using exclusiveOR i = 50000。 // Delay do (i)。 while (i != 0)。 }}//******************************************************************************// MSPFET430P140 Demo WDT, Toggle , Interval Overflow ISR, DCO SMCLK//// Description: Toggle using software timed by the WDT ISR. Toggle rate// is approximately 30ms based on default ~ 800khz DCO/SMCLK clock source// used in this example for the WDT.// ACLK= n/a, MCLK= SMCLK= default DCO~ 800k//// MSP430F149// // /|\| XIN|// | | |// |RST XOUT|// | |// | |LED//// Dasheng// LiTian Electronic Inc.// Feb 2008// Built with IAR Embedded Workbench Version: //******************************************************************************include include void main(void){ BoardConfig(0xbf)。 //關(guān)閉數(shù)碼管、流水燈和電平轉(zhuǎn)換 WDTCTL = WDT_MDLY_32。 // Set Watchdog Timer interval to ~30ms IE1 |= WDTIE。 // Enable WDT interrupt P3DIR |= BIT4。 // Set to output direction _BIS_SR(LPM0_bits + GIE)。 // Enter LPM0 w/ interrupt}// Watchdog Timer interrupt service routinepragma vector=WDT_VECTOR__interrupt void watchdog_timer(void){ P3OUT ^= BIT4。 // Toggle using exclusiveOR}//******************************************************************************// MSPFET430P140 Demo WDT, Toggle , Interval Overflow ISR, 32kHz ACLK//// Description: Toggle 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 watchcrystal(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|// | |// | |LED//// Dasheng// LiTian Electronic Inc.// Feb 2008// Built with IAR Embedded Workbench Version: //******************************************************************************include include void main(void){ BoardConfig(0xb8)。 WDTCTL = WDT_ADLY_ // WDT 250ms, ACLK, interval timer IE1 |= WDTIE。 // Enable WDT interrupt P3DIR |= BIT4。 // Set to output direction _BIS_SR(LPM3_bits + GIE)。 // Enter LPM3 w/interrupt}// Watchdog Timer interrupt service routinepragma vector=WDT_VECTOR__interrupt void watchdog_timer(void){ P3OUT ^= BIT4。 // Toggle using exclusiveOR}//******************************************************************************// MSPFET430P140 Demo Timer_A, Toggle , CCR0 Cont. Mode ISR, DCO SMCLK//// Description: Toggle using software and TA_0 ISR. Toggles every// 50000 SMCLK cycles. SMCLK provides clock source for TACLK.// During the TA_0 ISR, is toggled and 50000 clock cycles are added to// CCR0. TA_0 ISR is triggered every 50000 cycles. CPU is normally off and// used only during TA_ISR.// ACLK = n/a, MCLK = SMCLK = TACLK = default DCO ~800kHz//// MSP430F149// // /|\| XIN|// | | |// |RST XOUT|// | |// | |LED//// Dasheng// LiTian Electronic Inc.// Feb 2008// Built with IAR Embedded Workbench Version: //******************************************************************************include include void main(void){ WDTCTL = WDTPW + WDTHOLD。 // Stop WDT BoardConfig(0xb8)。 //關(guān)閉數(shù)碼管、流水燈和電平轉(zhuǎn)換 P3DIR |= BIT4。 // output CCTL0 = CCIE。 // CCR0 interrupt enabled CCR0 = 50000。 TACTL = TASSEL_2 + MC_2。 // SMCLK, contmode _BIS_SR(LPM0_bits + GIE)。 // Enter LPM0 w/ interrupt}// Timer A0 interrupt service routinepragma vector=TIMERA0_VECTOR__interrupt void Timer_A (void){ P3OUT ^= BIT4。 // Toggle CCR0 += 50000。 // Add Offset to CCR0}//******************************************************************************// MSPFET430P140 Demo Timer_A, Toggle , CCR0 Up Mode ISR, DCO SMCLK//// Description: Toggle using software and TA_0 ISR. Timer_A is// configured for up mode, thus the timer overflows when TAR counts// to CCR0. In this example, CCR0 is loaded with 20000.// ACLK = n/a, MCLK = SMCLK = TACLK = default DCO ~800kHz//// MSP430F149// // /|\| XIN|// | | |// |RST XOUT|// | |// | |LED//// Dasheng// LiTian Electronic Inc.// Feb 2008// Built with IAR Embedded Workbench Version: //***************************************************************************