PWM pic16f877a viết bằng ASM cần giúp

**trungduc** · 19-11-2011, 03:40 PM

Tham khảo đoạn code này nhé!
PWM_ROUTINE

;BANKSEL ADCON1 ;turn off A2D
;MOVLW 0x06
;MOVWF ADCON1

MOVWF CCPR1L
MOVWF CCPR2L

BANKSEL TRISC
MOVLW D'0' ;set PORTC as all outputs
MOVWF TRISC
BANKSEL PORTC
MOVLW 0x0C
MOVWF CCP1CON
MOVLW 0x0C
MOVWF CCP2CON

MOVLW D'63' ;set highest PWM value
BANKSEL PR2 ;over this (63) is permanently on
MOVWF PR2
BANKSEL TMR2

MOVLW 0x00
MOVWF T2CON

BSF T2CON, TMR2ON ;and start the timer running

RETURN

19-11-2011, 03:40 PM	#2
trungduc Đệ tử 2 túi Tham gia ngày: Oct 2008 Bài gửi: 44 :	Tham khảo đoạn code này nhé! PWM_ROUTINE ;BANKSEL ADCON1 ;turn off A2D ;MOVLW 0x06 ;MOVWF ADCON1 MOVWF CCPR1L MOVWF CCPR2L BANKSEL TRISC MOVLW D'0' ;set PORTC as all outputs MOVWF TRISC BANKSEL PORTC MOVLW 0x0C MOVWF CCP1CON MOVLW 0x0C MOVWF CCP2CON MOVLW D'63' ;set highest PWM value BANKSEL PR2 ;over this (63) is permanently on MOVWF PR2 BANKSEL TMR2 MOVLW 0x00 MOVWF T2CON BSF T2CON, TMR2ON ;and start the timer running RETURN