PIC16F84產(chǎn)生兩組PWM輸出的實(shí)例源程序

時間：2011-05-06 16:15:53

關(guān)鍵字：源程序 PWM輸出 PIC16F BSP

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[導(dǎo)讀]PIC16F84產(chǎn)生兩組PWM輸出的實(shí)例源程序;********************************************************************** list p=16F84 ; list directive to define processor ＃i nclude <p16F84.inc

PIC16F84產(chǎn)生兩組PWM輸出的實(shí)例源程序

;**********************************************************************
list p=16F84 ; list directive to define processor
＃i nclude <p16F84.inc> ; processor specific variable definitions

__CONFIG _CP_OFF & _WDT_OFF & _PWRTE_OFF & _RC_OSC

; '__CONFIG' directive is used to embed configuration data within .asm file.
; The lables following the directive are located in the respective .inc file.
; See respective data sheet for additional information on configuration word.

;********************** CONST DEFINITIONS******************************
FULL_WORK = 10 ; 程???㏄戳箇砞?
DEF_WORK1 = 2 ; PWM1??㏄戳箇砞?
DEF_WORK2 = 8 ; PWM2??㏄戳箇砞?
PORT_OUT = PORTB           ; PWM塊?梆
PIN_PWM1 = 0               ; PWM1塊?竲?
PIN_PWM2 = 1               ; PWM2塊?竲?
;********************** VARIABLE DEFINITIONS***************************
CBLOCK 0x0C
w_temp ; variable used for context saving
status_temp ; variable used for context saving
PWM_FULL ; 程???㏄戳璸計竟(?計)
PWM_WORK_CFG1 ; PWM1 ??㏄戳砞﹚既?竟
PWM_WORK_CFG2 ; PWM2 ??㏄戳砞﹚既?竟
PWM_WORK_CNT1 ; PWM1 ??㏄戳璸計竟(?計)
PWM_WORK_CNT2 ; PWM2 ??㏄戳璸計竟(?計)
ENDC
;**********************************************************************
;******************      垂??竚?祘Α秈?翴   ***********************
;**********************************************************************
ORG     0x000   ; processor reset vector
ResetStart
    goto    main   ; go to beginning of program
;**********************************************************************
;******************      い耞狝叭祘Α秈?翴   *************************
;**********************************************************************
ORG     0x004   ; interrupt vector location
movwf   w_temp   ; save off current W register contents
movf STATUS,w ; move status register into W register
movwf status_temp ; save off contents of STATUS register

bsf STATUS,RP0
bcf INTCON,T0IF ; 睲埃璸?竟い耞篨腹
bcf STATUS,RP0

decfsz PWM_FULL,F ; 浪琩琌?ЧΘ??㏄戳
goto ISR_PWM1
bsf PORT_OUT,PIN_PWM1 ; PWM1/PWM2?確High筿?
bsf PORT_OUT,PIN_PWM2
movlw FULL_WORK               ; ?穝砞﹚???㏄戳璸計竟
movwf PWM_FULL
movf PWM_WORK_CFG1,W
movwf PWM_WORK_CNT1
movf PWM_WORK_CFG2,W
movwf PWM_WORK_CNT2
goto ISR_EXIT
ISR_PWM1
decfsz PWM_WORK_CNT1,F         ; 浪琩PWM1??㏄戳
goto ISR_PWM2
bcf PORT_OUT,PIN_PWM1       ; ??㏄戳擋??盢塊?砞?Low筿?
ISR_PWM2
decfsz PWM_WORK_CNT2,F         ; 浪琩PWM2??㏄戳
goto ISR_EXIT
bcf PORT_OUT,PIN_PWM2       ; ??㏄戳擋??盢塊?砞?Low筿?
ISR_EXIT
movf    status_temp,w ; retrieve copy of STATUS register
movwf STATUS   ; restore pre-isr STATUS register contents
swapf   w_temp,f
swapf   w_temp,w ; restore pre-isr W register contents
retfie    ; return from interrupt
;**********************************************************************
;******************      ?﹍てPWM      *******************************
;**********************************************************************
InitPWM
bsf     STATUS,RP0 ; 砞﹚PWM1/PWM2竲?塊?
                bcf     PORT_OUT,PIN_PWM1
                bcf     PORT_OUT,PIN_PWM2
bcf     STATUS,RP0
                bsf     PORT_OUT,PIN_PWM1       ; 箇砞PWM1/PWM2塊?藹筿?
                bsf     PORT_OUT,PIN_PWM2
movlw FULL_WORK               ; 砞﹚?既?竟ぇ箇砞?
movwf PWM_FULL
movlw DEF_WORK1
movwf PWM_WORK_CFG1
movwf PWM_WORK_CNT1
movlw DEF_WORK2
movwf PWM_WORK_CFG2
movwf PWM_WORK_CNT2
retlw 0
;**********************************************************************
;******************      ?﹍て璸?竟   *******************************
;**********************************************************************
InitTimer
bsf     STATUS,RP0
bsf OPTION_REG,T0CS ; 氨ゎ?歷竟?猧塊?
bsf OPTION_REG,PSA ; 砞﹚ぃㄏノ?猧箇埃竟
bsf INTCON,GIE ; ゴ秨?辦い耞秨閩(い耞羆秨閩)
bcf INTCON,T0IF ; 睲埃璸?竟い耞篨腹
bcf     STATUS,RP0
retlw 0
;**********************************************************************
;******************      幣笆璸?竟     *******************************
;**********************************************************************
StartTimer
bsf     STATUS,RP0
bcf OPTION_REG,T0CS ; 砞﹚?歷竟?猧塊?(1/4 osc)
bsf INTCON,T0IE ; ゴ秨璸?竟い耞
bcf     STATUS,RP0
retlw 0
;**********************************************************************
;******************      氨ゎ璸?竟     *******************************
;**********************************************************************
StopTimer
bsf     STATUS,RP0
bsf OPTION_REG,T0CS ; 氨ゎ?歷竟?猧塊?
bcf INTCON,T0IE ; 閩?璸?竟い耞
bcf     STATUS,RP0
retlw 0
;**********************************************************************
;******************      ?祘Α秈?翴   *******************************
;**********************************************************************
main
bcf     STATUS,RP0 ; select Page 0 for Port Access
call InitPWM
call InitTimer
call StartTimer
goto $
;**********************************************************************
END    ; directive 'end of program'