;******************************************************************************
;   MSP-FET430P140 Demo - Timer_B Toggle P1.0, TBCCR0 upmode ISR, DCO SMCLK
;
;   Description; This program will toggle P1.0 using software and 
;   the TB_0 ISR. Timer_B is configured in upmode, thus the the timer
;   will overflow when TAB counts to TBCCR0.  In this example, TBCCR0 is 
;   loaded with 20000. 
;   ACLK = n/a, MCLK = SMCLK = TBCLK = default DCO ~ 800k 
;
;                MSP430F149
;             -----------------
;         /|\|              XIN|-  
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;            |             P1.0|-->LED
;
;   M.Buccini
;   Texas Instruments, Inc
;   June 2004
;******************************************************************************
#include  "msp430x14x.h"
;------------------------------------------------------------------------------ 
            ORG     01100h                  ; Progam Start 
;------------------------------------------------------------------------------ 
RESET       mov.w   #0A00h,SP               ; Initialize 'x1x9 stackpointer
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
SetupP1     bis.b   #001h,&P1DIR            ; P1.0 output 
SetupC0     mov.w   #CCIE,&TBCCTL0          ; TBCCR0 interrupt enabled
            mov.w   #20000,&TBCCR0          ; 
SetupTB     mov.w   #TBSSEL_2+MC_1,&TBCTL   ; SMCLK, upmode
                                            ;						  
Mainloop    bis.w   #CPUOFF+GIE,SR          ; CPU off, interrupts enabled
            nop                             ; Required only for debugger
                                            ;
;------------------------------------------------------------------------------ 
TB0_ISR;    Toggle P1.0
;------------------------------------------------------------------------------ 
            xor.b   #001h,&P1OUT            ; Toggle P1.0
            reti                            ;		 
                                            ;
;------------------------------------------------------------------------------ 
;           Interrupt Vectors Used MSP430x13x/14x/15x/16x         
;------------------------------------------------------------------------------ 
            ORG     0FFFEh                  ; MSP430 RESET Vector
            DW      RESET                   ; 
            ORG     0FFFAh                  ; Timer_B0 Vector
            DW      TB0_ISR                 ; 
            END