.cdecls C,LIST,"msp430.h"

            .def    RESET
            .text
            .retain
            .retainrefs

RESET:      mov.w   #__STACK_END, SP            ; Initialize stackpointer
StopWDT:    mov.w   #WDTPW | WDTHOLD, &WDTCTL   ; Stop watchdog timer
SetupP1:    bis.b   #1b, &P1DIR                 ; P1.0 output
SetupC0:    mov.w   #CCIE, &CCTL0               ; CCR0 interrupt enabled
            mov.w   #50000, &CCR0
SetupTA:    mov.w   #TASSEL_2 | MC_2, &TACTL    ; SMCLK, continuous

Mainloop:   bis.w   #CPUOFF + GIE, SR           ; CPU off, interrupts on
            nop

TA0_ISR:
            xor.b   #1b, &P1OUT                 ; Toggle P1.0
            add.w   #50000, &CCR0               ; Add offset to CCR0
            reti

            .global __STACK_END
            .sect   .stack

            .sect   ".reset"                    ; MSP430 RESET Vector
            .short  RESET
            .sect   ".int09"                    ; Timer_A0 Vector
            .short  TA0_ISR
            .end