;******************************************************************************* ; MSP430G2xx1 Demo - WDT, Toggle P1.0, Interval Overflow ISR, DCO SMCLK ; ; Description: Toggle P1.0 using software timed by the WDT ISR Toggle rate ; is approximately 30ms based on default DCO/SMCLK clock source ; used in this example for the WDT ; ACLK = n/a, MCLK = SMCLK = default DCO ; ; MSP430G2xx1 ; ; /|\| XIN|; | | | ; |RST XOUT|; | | ; | P1.0| >LED ; ; D Dang ; Texas Instruments Inc ; October 2010 ; Built with Code Composer Essentials Version: 4.2.0 ;******************************************************************************* cdecls C,LIST, "msp430g2231.h" ; -.text ; Program Start ; -RESET mov.w #0280h,SP ; Initialize stackpointer SetupWDT mov.w #WDT_MDLY_32,&WDTCTL ; WDT ~30ms interval timer bis.b #WDTIE,&IE1 ; Enable WDT interrupt SetupP1 bis.b #001h,&P1DIR ; P1.0 output ; Mainloop bis.w #CPUOFF+GIE,SR ; CPU off, enable interrupts nop ; Required only for debugger ; ; WDT_ISR; Toggle P1.0 ; xor.b #001h,&P1OUT ; Toggle P1.0 reti ; ; ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; sect ".int10" ; WDT Vector short WDT_ISR ; end