;******************************************************************************* ; MSP430G2xx1 Demo - Poll P1 With Software with Internal Pull-up ; ; Description: Poll P1.4 in a loop, if hi P1.0 is set, if low, P1.0 reset ; 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 Mainloop bit.b jc #010h,&P1IN ON ; P1.4 hi/low? ; jmp > P1.4 is set ; OFF bic.b #001h,&P1OUT ; P1.0 = / LED OFF jmp Mainloop ; ON bis.b #001h,&P1OUT ; P1.0 = / LED ON jmp Mainloop ; ; ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; end