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PS7219的PIC单片机接口程序
;Copyright (c)1998,MICROCHIP Technology Inc
;*************************************************
TITLE"PS7219TEST"；标题
LIST P=16C711；处理器为PIC16C711
#INCLUDE P16c711.INC
TIMER1EQU H'000C'；定义延时寄存器
TIMER2EQU H'000D'
SENT_ADDRESS EQU H'000E'；定义发送地址寄存器
SENT_DATA EQU H'000F'；定义发送数据寄存器
LED1EQU H'0010'
LED2EQU H'0011'
LED3EQU H'0012'
LED4EQU H'0013'
LED5EQU H'0014'
LED6EQU H'0015'
LED7EQU H'0016'
LED8EQU H'0017'
COUNT EQU H'0018'
NO_OP EQU0X00；定义控制寄存器
DIGIT1EQU0X01
DIGIT2EQU0X02
DIGIT3EQU0X03
DIGIT4EQU0X04
DIGIT5EQU0X05
DIGIT6EQU0X06
DIGIT7EQU0X07
DIGIT8EQU0X08
DECODE EQU0X09
INTSEN EQU0X0A
SCAN EQU0X0B
SHUT EQU0X0C
FLASH EQU0X0D
DISPLAY EQU0X0F
LOAD EQU0；通讯引脚定义
DOUT EQU1
CLK EQU2
ORG0
GOTO START；程序开始
ORG H'0010'
;*************************
;延时子程序
;*************************
T1
MOVLW33；延时子程序T1
MOVWF TIMER1
DEL_LOP
CLRWDT
DECFSZ TIMER1,1
GOTO DEL_LOP
RETURN
T2
MOVLW0X04；延时子程序T2
MOVWF TIMER1
MOVLW0XFF
LOOP2
MOVWF TIMER2
LOOP1
CLRWDT
DECFSZ TIMER2,1
GOTO LOOP1
DECFSZ TIMER1,1
GOTO LOOP2
RETURN
SEND
MOVLW8；数据传送子程序SEND
MOVWF COUNT
BCF PORTA,LOAD；初始化LOAD引脚
CALL T1
SET_LP1
BCF STATUS,C；发送8位地址
BSF PORTA,CLK
RLF SENT_ADDRESS,1
BCF PORTA,DOUT
BTFSC STATUS,C
BSF PORTA,DOUT
BCF PORTA,CLK
CALL T1；调用延时子程序T1
DECFSZ COUNT,1；COUNT减一为1零则结束传送
GOTO SET_LP1
BSF PORTA,CLK
MOVLW8
MOVWF COUNT
BSF PORTA,LOAD
SET_LP2
BCF STATUS,C；发送8位数据
BSF PORTA,CLK
RLF SENT_DATA,1
BCF PORTA,DOUT
BTFSC STATUS,C
BSF PORTA,DOUT
BCF PORTA,CLK
CALL T1；调用延时子程序T1
DECFSZ COUNT,1；COUNT减一为零则结束传送
GOTO SET_LP2
BSF PORTA,CLK
CALL T1
BSF PORTA,LOAD
BSF PORTA,DOUT
RETURN；子程序返回
START
BSF STATUS,RP0；主程序
MOVLW0X18
MOVWF TRISA
MOVLW0XFF
MOVWF TRISB
BCF STATUS,RP0
CALL T1
CALL T1
MOVLW0X12
MOVWF PORTA
BCF PORTA,LOAD
CON_COM
CALL T1；初始化PS7219内部RAM
MOVLW0X0A；设置亮度为最亮
MOVWF SENT_ADDRESS
MOVLW0X0F
MOVWF SENT_DATA
CALL SEND；调用串行通讯子程序
CALL T1
MOVLW0X0B；设置扫描界线为8位
MOVWF SENT_ADDRESS
MOVLW0X07
MOVWF SENT_DATA
CALL SEND；调用串行通讯子程序
CALL T1
MOVLW0X09；设置每位译码方式为BCD译码
MOVWF SENT_ADDRESS
MOVLW0XFF
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X0C；设置工作方式为正常
MOVWF SENT_ADDRESS
MOVLW0X01
MOVWF SENT_DATA
CALL SEND
LED_CON
CALL T1；LED显示控制部分
MOVLW0X01；LED1显示为1
MOVWF SENT_ADDRESS
MOVLW0X01
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X02；LED2显示为2
MOVWF SENT_ADDRESS
MOVLW0X02
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X03；LED3显示为3
MOVWF SENT_ADDRESS
MOVLW0X03
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X04；LED4显示为4
MOVWF SENT_ADDRESS
MOVLW0X04
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X05；LED5显示为5
MOVWF SENT_ADDRESS
MOVLW0X05
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X06；LED6显示为6
MOVWF SENT_ADDRESS
MOVLW0X06
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X07；LED7显示为7
MOVWF SENT_ADDRESS
MOVLW0X07
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X08；LED8显示为8
MOVWF SENT_ADDRESS
MOVLW0X08
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X0F；进入测试模式
MOVWF SENT_ADDRESS
MOVLW0X01
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X0F；退出测试模式
MOVWF SENT_ADDRESS
MOVLW0X00
MOVWF SENT_DATA
CALL SEND
CALL T1
MOVLW0X0D；使能8位LED闪烁
MOVWF SENT_ADDRESS
MOVLW0XFF
MOVWF SENT_DATA
CALL SEND
FINISH CLRWDT；清Watch Dog
GOTO FINISH
END；结束
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