;******************************************************************************* ; MSP430G2xx2 Demo - Timer_A, Toggle P1.0, CCR0 Up Mode ISR, 32kHz ACLK ; ; Description: Toggle P1.0 using software and the 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 1000-1 ; ACLK = TACLK = LFXT1 = 32768Hz, MCLK = SMCLK = default DCO ; //* An external watch crystal on XIN XOUT is required for ACLK *// ; ; MSP430G2xx2 ; ; /|\| XIN|; | | | 32kHz ; |RST XOUT|; | | ; | P1.0| >LED ; ; D Dang ; Texas Instruments Inc ; December 2010 ; Built with Code Composer Essentials Version: 4.2.0 ;******************************************************************************* cdecls C,LIST, "msp430g2452.h" ; -.text ; Progam Start ; -RESET mov.w #0280h,SP ; Initialize stackpointer StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT SetupP1 bis.b #001h,&P1DIR ; P1.0 output SetupC0 mov.w #CCIE,&CCTL0 ; CCR0 interrupt enabled mov.w #1000-1,&CCR0 ; CCR0 counts to 1000 SetupTA mov.w #TASSEL_1+MC_1,&TACTL ; ACLK, upmode ; Mainloop bis.w nop #LPM3+GIE,SR ; Enter LPM3, interrupts enabled ; Required for debugger ; ; TA0_ISR; Toggle P1.0 ; xor.b #001h,&P1OUT ; Toggle P1.0 reti ; ; ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; sect ".int09" ; Timer_A0 Vector short TA0_ISR ; end