Buenas Gente del Foro
me he comprado una pic trainer ql200
esta me trajo varios programas examples. estoy usando un pic 16f877a
bueno cargue unprograma de display 7 segmentos pero aun no entiendo como logran mostrar del 1 al 6. paso esquema y el programa.
me gustaria aprender a hacerlo pero en pic basic pro
;experiment purpose: familiar some LED dynamic scan display
;six LED display 0123456 six numbers from left to right
;hardware request:SW S5,S6 all set ON,the other SW all set OFF
#include<p16f877A.inc> ;include MCU head file
__CONFIG _DEBUG_OFF&_CP_ALL&_WRT_HALF&_CPD_ON&_LVP_OFF&_BODEN_OFF&_PWRTE_ON&_WDT_OFF&_HS_OSC
;THE configure of MCU,watchdog OFF,electrify delay OPEN,power down check OFF,
;LOW power programme OFF,encrypt,4M crystal HS surge.
ORG 00H ;reset entrance address
NOP ;the nop instruction of ICD require
MOVLW 0FFH
MOVWF PORTA
MOVWF PORTD ;clear all display
BSF STATUS,RP0 ;select BANK1
CLRF TRISA ;set A PORT OUTPUT
CLRF TRISD ;set D PORT OUTPUT
MOVLW 06H
MOVWF ADCON1 ;set A PORT general I/O PORT
BCF STATUS,RP0 ;BANK0
LOOP
MOVLW 0 ;display 0
CALL TABLE
MOVWF PORTD
BCF PORTA,0
CALL DELAY
BSF PORTA,0
MOVLW 1 ;display 1
CALL TABLE
MOVWF PORTD
BCF PORTA,1
CALL DELAY
BSF PORTA,1
MOVLW 2 ;display 2
CALL TABLE
MOVWF PORTD
BCF PORTA,2
CALL DELAY
BSF PORTA,2
MOVLW 3 ;display 3
CALL TABLE
MOVWF PORTD
BCF PORTA,3
CALL DELAY
BSF PORTA,3
MOVLW 4 ;display 4
CALL TABLE
MOVWF PORTD
BCF PORTA,4
CALL DELAY
BSF PORTA,4
MOVLW 5 ;display 5
CALL TABLE
MOVWF PORTD
BCF PORTA,5
CALL DELAY
BSF PORTA,5
GOTO LOOP ;circle display
;**************check table subprogram*******************
TABLE
ADDWF PCL,1 ;instruction register add excursion address
RETLW 0C0H ;the code of 0( the common LED is anode)
RETLW 0F9H ;the code of 1
RETLW 0A4H ;the code of 2
RETLW 0B0H ;the code of 3
RETLW 99H ;the code of 4
RETLW 92H ;the code of 5
;**************delay subprogram*****************************
DELAY
MOVLW 0FFH
MOVWF 20H
DECFSZ 20H,1
GOTO $-1
RETURN
END ;program end
aqui una foto de como se ve
aqui el esquema
muchas gracias de antemano
