; MSP430G2xx2 Demo - Timer_A, PWM TA1, Up/Down Mode, DCO SMCLK ; ; Description: This program generates one PWM output on P1.1 using ; Timer_A configured for up/down mode.. Dang ; Texas I
Trang 1; MSP430G2xx2 Demo - Timer_A, PWM TA1, Up/Down Mode, DCO SMCLK
;
; Description: This program generates one PWM output on P1.1 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
; A 75% duty cycle is on P1.2
; SMCLK = MCLK = TACLK = default DCO
;
; MSP430G2xx2
;
-; /|\|
XIN|-; | | |
; |RST
XOUT|-; | |
; | P1.2/TA1| > CCR1 - 75% PWM
;
; 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 #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_2+MC_3,&TACTL ; SMCLK, updown mode
;
Mainloop bis.w #CPUOFF,SR ; CPU off
nop ; Required only for debugger
;
; -; Interrupt Vectors
.sect ".reset" ; MSP430 RESET Vector
short RESET ;
end