剛寫(xiě)的一個(gè)PCF8563匯編程序，請(qǐng)教高手！！！
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;PCF8563時(shí)鐘程序，不帶設(shè)置采用RT1602C液晶顯示??????????????????????????
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;????????????????? 地址分配
;===============================================================
BITCNT DATA 30H???? //I2C位計(jì)數(shù)器地址
BYTECNT DATA 31H???? //I2C字節(jié)計(jì)數(shù)器地址
RTCADR DATA 32H????? //RTC（PCF8563）在I2C上的地址
RTCREGADR DATA 33H??? //RTC 單元地址（16個(gè)寄存器地址）
RECVDATBUF DATA 40H?? //接收數(shù)據(jù)緩沖區(qū)
SENDDATBUF DATA 50H?? //發(fā)送數(shù)據(jù)緩沖區(qū)
RT1602CBUF DATA 60H?? //液晶顯示緩沖區(qū)
ACK BIT 20H????????????? //接收數(shù)據(jù)非應(yīng)答標(biāo)志
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;???????????????? 端口位定義
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SDA BIT P3.6??????????? //PCF8563
SCL BIT P3.7
;---------------------------------------------------------------
RS BIT P2.5???????????? //RT1602C
RW BIT P2.6
E? BIT P2.7
;---------------------------------------------------------------
;===============================================================
;名稱：主程序
;描述：初始化程序，寫(xiě)入時(shí)鐘，液晶顯示，讀出時(shí)鐘，報(bào)警設(shè)置，循環(huán)
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???? ORG 0000H
???? AJMP MAIN
???? ORG 000BH?????????? //定時(shí)器0的入口地址
???? AJMP TIME0
???? ORG 0013H?????????? //INT1的入口地址
???? AJMP ALARMINT
???? ORG 0020H
MAIN:
???? MOV SP,#70H???????? //堆棧指針
???? MOV IP,#04H???????? //設(shè)置INT1中斷優(yōu)先級(jí)高
???? LCALL SENDTIME???????? //寫(xiě)入時(shí)鐘
;---------------------------------------------------------------
;????????? 報(bào)警設(shè)置
;---------------------------------------------------------------
???? MOV 50H,#10H??????? //10分鐘報(bào)警時(shí)刻送發(fā)送緩沖區(qū)
???? MOV RTCADR,#0A2H???? //送PCF8563在I2C的寫(xiě)的地址
???? MOV RTCREGADR,#09H? //取小時(shí)報(bào)警控制字節(jié)地址
???? MOV BYTECNT,#1
???? LCALL SENDDATA????? //送報(bào)警信息????
???
GOAHEAD:
???? LCALL READTIME????? //讀出時(shí)鐘
???? LCALL RT1602CDISP???? //顯示時(shí)鐘
???? LCALL D10MS
???? AJMP GOAHEAD