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HT1380实时时钟驱动程序
HT1380 EQU 0X06
COUNT0 EQU 0X10
TXBUF EQU 0X11
RXBUF EQU 0X12
DATABUF EQU 0X13
ADDRPOINT EQU 0X14
HT_SDA_IN EQU 0B01001000
HD_SDA_OUT EQU 0B00001000
HT_SCL EQU 0
HT_RST EQU 1
Ht_SDA EQU 2
;
TX_1380: MOV A,@HT_SDA_OUT
IOW HT1380
BC HT1380,HT_SCL
MOV A,@8
MOV COUNT0,A
TX_1380_LP:
BC HT1380,HT_SDA
JBC TXBUF,0
BS HT1380,HT_SDA
BS HT1380,HT_SCL
RRC TXBUF
BC HT1380,HT_SCL
DJZ COUNT0
JMP TX_1380_LP
RET
;读HT1380子程序
READ_HT:
MOV TXBUF,A
BC HT1380,HT_SCL
BS HT1380,HT_RST
MOV A,@HT_SDA_OUT
IOW HT1380
MOV A,@8
MOV COUNT0,A
TX_1_LP:
BC HT1380,HT_SDA
JBC TXBUF,0
BS HT1380,HT_SDA
BS HT1380,HT_SCL
RRC TXBUF
BC HT1380,HT_SCL
DJZ COUNT0
JMP TX_1_LP
MOV A,@HT_SDA_IN
IOW HT1380
MOV A,@8
MOV COUNT0,A
RX_1380_LP:
RRC RXBUF
BC RXBUF,7
JBC HT1380,HT_SDA
BS RXBUF,7
BS HT1380,HT_SCL
BC HT1380,HT_SCL
DJZ COUNT0
JMP RX_1380_LP
BC HT1380,HT_RST
RET
;写HT1380子程序
WRITE_HT:
MOV ADDRPOINT,A
BC HT1380,HT_SCL
BS HT1380,HT_RST
MOV A,@0B1000110
MOV TXBUF,A
CALL TX_1380
CLR TXBUF
CALL TX_1380
BC HT1380,HT_RST
NOP
BS HT1380,HT_RST
MOV A,ADDRPOINT
MOV TXBUF,A
CALL TX_1380
MOV A,DATABUF
MOV TXBUF,A
CALL TX_1380
BC HT1380,HT_RST
NOP
BS HT1380,HT_RST
MOV A,@0B10001110
MOV TXBUF,A
CALL TX_1380
MOV A,@0B10000000
MOV TXBUF,A
CALL TX_1380
BC HT1380,HT_RST
MOV A,HT_SDA_IN
IOW HT1380
RET
END |
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