fet140_tb_10.s43

MSP430F135的TB操作代码,绝对的真实可行.放心下载

;******************************************************************************
;   MSP-FET430P140 Demo - Timer_B, PWM TB1-6, Up Mode, DCO SMCLK
;
;   Description: This program generates six PWM outputs on P4.1-6 using
;   Timer_B configured for up mode. The value in CCR0, 512-1, defines the PWM
;   period and the values in CCR1-6 the PWM duty cycles. Using ~800kHz SMCLK
;   as TBCLK, the timer period is ~640us.
;   ACLK = n/a, SMCLK = MCLK = TBCLK = default DCO ~800kHz.
;
;                MSP430F149
;             -----------------
;         /|\|              XIN|-
;          | |                 |
;          --|RST          XOUT|-
;            |                 |
;            |         P4.1/TB1|--> CCR1 - 75% PWM
;            |         P4.2/TB2|--> CCR2 - 25% PWM
;            |         P4.3/TB3|--> CCR3 - 12.5% PWM
;            |         P4.4/TB4|--> CCR4 - 6.25% PWM
;            |         P4.5/TB5|--> CCR5 - 3.125% PWM
;            |         P4.6/TB6|--> CCR6 - 1.5625% PWM
;
;   M. Buccini
;   Texas Instruments Inc.
;   Feb 2005
;   Built with IAR Embedded Workbench Version: 3.21A
;******************************************************************************
#include  <msp430x14x.h>
;------------------------------------------------------------------------------
            ORG     01100h                  ; Program Start
;------------------------------------------------------------------------------
RESET       mov.w   #0A00h,SP               ; Initialize stackpointer
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
SetupP4     bis.b   #007Eh,&P4DIR           ; P4.1-P4.6 output
            bis.b   #007Eh,&P4SEL           ; P4.1-P4.6 TB1-6 otions
SetupC0     mov.w   #512-1,&TBCCR0          ; PWM Period
SetupC1     mov.w   #OUTMOD_7,&TBCCTL1      ; CCR1 reset/set
            mov.w   #384,&TBCCR1            ; CCR1 PWM Duty Cycle	
SetupC2     mov.w   #OUTMOD_7,&TBCCTL2      ; CCR2 reset/set
            mov.w   #192,&TBCCR2            ; CCR2 PWM duty cycle	
SetupC3     mov.w   #OUTMOD_7,&TBCCTL3      ; CCR3 reset/set
            mov.w   #96,&TBCCR3             ; CCR3 PWM duty cycle	
SetupC4     mov.w   #OUTMOD_7,&TBCCTL4      ; CCR4 reset/set
            mov.w   #48,&TBCCR4             ; CCR4 PWM duty cycle	
SetupC5     mov.w   #OUTMOD_7,&TBCCTL5      ; CCR5 reset/set
            mov.w   #24,&TBCCR5             ; CCR5 PWM duty cycle	
SetupC6     mov.w   #OUTMOD_7,&TBCCTL6      ; CCR6 reset/set
            mov.w   #12,&TBCCR6             ; CCR6 PWM duty cycle	
SetupTB     mov.w   #TBSSEL_2+MC_1,&TBCTL   ; SMCLK, upmode
                                            ;					
Mainloop    bis.w   #CPUOFF,SR              ; CPU off
            nop                             ; Required only for debugger
                                            ;
;------------------------------------------------------------------------------
;           Interrupt Vectors
;------------------------------------------------------------------------------
            ORG     0FFFEh                  ; MSP430 RESET Vector
            DW      RESET                   ;
            END