;******************************************************************************* ; MSP430G2xx2 Demo - Timer_A, PWM TA1, Up Mode, 32kHz ACLK ; ; Description: This program generates one PWM outputs on P1.2 using ; Timer_A configured for up mode The value in CCR0, 512-1, defines the PWM ; period and the value in CCR1 the PWM duty cycle Using 32kHz ; ACLK as TACLK, the timer period is 15.6ms with a 75% duty cycle on P1.2 ; Normal operating mode is LPM3 ; ACLK = TACLK = LFXT1 = 32768Hz, MCLK = default DCO ~800kHz ; //* External watch crystal on XIN XOUT is required for ACLK *// ; ; MSP430G2xx2 ; ; /|\| XIN|; | | | 32kHz ; |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 outputs bis.b #00Ch,&P1SEL ; P1.2 and P1.3 TA1/2 option SetupC0 mov.w #512-1,&CCR0 ; PWM Period SetupC1 mov.w #OUTMOD_7,&CCTL1 ; CCR1 reset/set mov.w #384,&CCR1 ; CCR1 PWM Duty Cycle SetupTA mov.w #TASSEL_1+MC_1,&TACTL ; ACLK, upmode ; Mainloop bis.w #LPM3,SR ; Remain in LPM3 nop ; Required only for debugger ; ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; end