Normal operating mode is LPM3.. Dang ; Texas Instruments Inc.
Trang 1; MSP430G2xx1 Demo - Timer_A, PWM TA1-2, Up/Down Mode, 32kHz ACLK
;
; Description: This program generates one PWM output on P1.2 using
; Timer_A configured for up/down mode The value in CCR0, 128, defines
; the PWM period/2 and the value in CCR1 the PWM duty cycle
; Using 32kHz ACLK as TACLK, the timer period is 7.8ms with a 75% duty
; cycle on P1.2 Normal operating mode is LPM3
; ACLK = TACLK = LFXT1 = 32768Hz, MCLK = default DCO
; //* External watch crystal on XIN XOUT is required for ACLK *//
;
; MSP430G2xx1
;
-; /|\|
XIN|-; | | | 32kHz
; |RST
XOUT|-; | |
; | P1.2/TA1| > CCR1 - 75% PWM
;
; 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 bis.b #00Ch,&P1DIR ; P1.2 and P1.3 output
bis.b #00Ch,&P1SEL ; P1.2 and P1.3 TA1/2 otions
SetupC0 mov.w #128,&CCR0 ; PWM Period/2
SetupC1 mov.w #OUTMOD_6,&CCTL1 ; CCR1 toggle/set
mov.w #32,&CCR1 ; CCR1 PWM Duty Cycle
SetupTA mov.w #TASSEL_1+MC_3,&TACTL ; ACLK, updown mode
;
Mainloop bis.w #LPM3,SR ; Enter LPM3
nop ; Required only for debugger
;
; -; Interrupt Vectors
.sect ".reset" ; MSP430 RESET Vector
short RESET ;
end