Timer_A is configured ; for up mode with CCR0 defining period, TA0 also output on P1.1.. No CPU or ; software resources required.. Dang ; Texas Instruments Inc.
Trang 1; MSP430G2xx2 Demo - Timer_A, Toggle P1.1/TA0, Up Mode, DCO SMCLK
;
; Description: Toggle P1.1 using hardware TA0 output Timer_A is configured
; for up mode with CCR0 defining period, TA0 also output on P1.1 In this
; example, CCR0 is loaded with 500 and TA0 will toggle P1.1 at TACLK/500
; Thus the output frequency on P1.1 will be the TACLK/1000 No CPU or
; software resources required
; As coded with TACLK = SMCLK, P1.1 output frequency is ~1000000/1000
; SMCLK = MCLK = TACLK = default DCO
;
; MSP430G2xx2
;
-; /|\|
XIN|-; | | |
; |RST
XOUT|-; | |
; | P1.1/TA0| > SMCLK/1000
;
; 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 #002h,&P1DIR ; P1.1 output
bis.b #002h,&P1SEL ; P1.1 option slect
SetupC0 mov.w #OUTMOD_4,&CCTL0 ; CCR0 toggle, upmode
mov.w #500-1,&CCR0 ;
SetupTA mov.w #TASSEL_2+MC_1,&TACTL ; SMCLK, clear TAR
;
Mainloop bis.w #CPUOFF,SR ; CPU off
nop ; Required only for debugger
;
; -; Interrupt Vectors
.sect ".reset" ; MSP430 RESET Vector
short RESET ;
end