msp430g2xx1 p1 04 asm

;******************************************************************************* ; MSP430G2xx1 Demo - P1 Interrupt from LPM4 with Internal Pull-up ; ; Description: A hi/low transition on P1.4 will trigger P1_ISR which, ; toggles P1.0 Normal mode is LPM4 ~ 0.1uA ; Internal pullup enabled on P1.4 ; ACLK = n/a, MCLK = SMCLK = default DCO ; ; MSP430G2xx1 ; ; /|\| XIN|; | | | ; |RST XOUT|; /|\ | R | ; o | P1.4-o 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 ; Progam Start ; -RESET mov.w #0280h,SP ; Initialize stackpointer StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT SetupP1 mov.b #001h,&P1DIR ; P1.0 output, else input mov.b #010h,&P1OUT ; P1.4 set, else reset bis.b #010h,&P1REN ; P1.4 pullup bis.b #010h,&P1IE ; P1.4 Interrupt enabled bis.b #010h,&P1IES ; P1.4 hi/low edge bic.b #010h,&P1IFG ; P1.4 IFG Cleared ; Mainloop bis.w #LPM4+GIE,SR ; LPM4, enable interrupts nop ; Required only for debugger ; ; P1_ISR; Toggle P1.0 Output ; xor.b #001h,&P1OUT ; P1.0 = toggle bic.b #010h,&P1IFG ; P1.4 IFG Cleared reti ; Return from ISR ; ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; sect ".int02" ; P1.x Vector short P1_ISR ; end