MSP430F2013测试程序

//****************************************************************************** // MSP430F20xx Demo - Software Toggle P1.0, MCLK = VLO/8 // // Description; Pulse P1.0 with a 1/100 active duty cycle using software. // Ultra-low frequency ~ 1.5kHz, ultra-low power active mode demonstrated. // ACLK = VL0, MCLK = VLO/8 ~1.5kHz, SMCLK = n/a // // MSP430F20xx // ----------------- // /|\| XIN|- // | | | // --|RST XOUT|- // | | // | P1.0|-->LED // // M.Buccini / L. Westlund // Texas Instruments, Inc // October 2005 // Built with IAR Embedded Workbench Version: 3.40A //****************************************************************************** #include <msp430x20x3.h> void main(void) { volatile unsigned int i; // Volatile to prevent removal WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer BCSCTL3 |= LFXT1S_2; // LFXT1 = VLO IFG1 &= ~OFIFG; // Clear OSCFault flag __bis_SR_register(SCG1 + SCG0); // Stop DCO BCSCTL2 |= SELM_3 + DIVM_3; // MCLK = LFXT1/8 P1DIR = 0xFF; // All P1.x outputs P1OUT = 0; // All P1.x reset P2DIR = 0xFF; // All P2.x outputs P2OUT = 0; // All P2.x reset for (;;) { P1OUT |= 0xFF; // P1.0 set for (i = 10; i > 0; i--); // Delay 1x P1OUT &= ~0xFF; // P1.0 reset for (i = 10; i > 0; i--); // Delay 100x } }