我使用CCS V6.2 编译一个Sinewave 波形,在TI 组语手册中未查阅到查表(Look Up Table)相关指令及Data 安排正确表示法,(Look Up Table 数据区)
我将程序附录于下,请帮我指证错误地方及正确语法, 谢谢您的协助,
Thanks your help.
;-------------------------------------------------------------------------------
; MSP430 Assembler Code Template for use with TI Code Composer Studio
;
;
;-------------------------------------------------------------------------------
.cdecls C,LIST,"msp430.h" ; Include device header file
;-------------------------------------------------------------------------------
.def RESET ; Export program entry-point to
; make it known to linker.
;-------------------------------------------------------------------------------
.text ; Assemble into program memory.
.retain ; Override ELF conditional linking
; and retain current section.
.retainrefs ; And retain any sections that have
; references to current section.
;-------------------------------------------------------------------------------
; Main loop here
;-------------------------------------------------------------------------------
RESET mov.w #0280h,SP ; Initialize stackpointer
mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT
bis.b #066h,&P1DIR ; P1.2 and P1.3 output
bis.b #066h,&P1SEL ; P1.2 and P1.3 TA1/2 otions
mov.w R4,#0C00H ;Initial R4
mov.w #1024-1,&CCR0 ; PWM Period
mov.w #OUTMOD_7,&TA0CCTL1 ; CCR1 reset/set
mov.w R4,&TA0CCR1 ; CCR1 PWM Duty Cycle
mov.w #ID_2,&TA0CTL ; ID_0 input clock
mov.w #TASSEL_2+MC_1,&TA0CTL ; SMCLK, upmode
mov.w #510,&CCR2 ; CCR2 PWM Duty Cycle
bis.b #CCIE,&TACCTL1 ; SMCLK, upmode
;
Mainloop bis.w #CPUOFF,SR ; CPU off
nop ; Required only for debugger
;-------------------------------------------------------------------------------
TA0_ISR; ISR for TACCR0
;-------------------------------------------------------------------------------
mov.w R4, CCR1 ; change PWM output value.
clr.w &TACTL ; Clear Timer_A control registers
mov.w #384,&CCR1 ; CCR1 PWM Duty Cycle
bis.b #CCIE ,&TACCTL1 ; Exit LPM0 on reti
inc.w R4
cmp.w R4,#0FFFh
jnz Lp1
mov.w #0C00h,R4
LP1 reti ;
;--------------------------------------------------------------------------------------------------
;Look Up Table Start Address &0FFC0 .
data
0C00H: 1024
0C02H: 1023
0C04H: 1021
0C06H: 1025
0C08H: 1026
0C0AH: 1020
0C0CH: 1021
0C0EH: 1029
0C10H: 1025
0C12H: 1016
0C14H: 1025
.
0FFFh: 0000.
;-------------------------------------------- End of data.
