文件名称:IIC______EEPROM
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IIC 往EEPROM 存取数据 并在二极管上显示
ORG 0000H
LJMP MAIN
SDA BIT P2.0
SCL BIT P2.1
MTD EQU 30H
MRD EQU 31H
读的总子程序
I2CREAD:
LCALL STA 起始
MOV A,#0A0H
LCALL WRBYT 发送芯片地址数据
LCALL CACK 接收ACK
MOV A,MRD
LCALL WRBYT 发送RAM地址数据
LCALL CACK 接收ACK
LCALL STA 起始
MOV A,#0A1H
LCALL WRBYT 发送地址数据
LCALL CACK 接收ACK
LCALL RDBYT 接收数据
SETB C 读一个字节C=1
LCALL MACK 发送NAK
LCALL STOP 读取完成
RET
- IIC EEPROM access to the data and the diode display ORG 0000H LJMP MAIN SDA BIT P2.0 SCL BIT P2.1 MTD EQU 30H MRD EQU 31H reading the total subprogram I2CREAD: LCALL STA starting MOV A,# 0A0H LCALL WRBYT send the chip address data LCALL CACK receiving ACK MOV A, MRD LCALL WRBYT send data RAM address LCALL CACK receiving ACK LCALL STA starting MOV A,# 0A1H LCALL WRBYT sending address data LCALL CACK receiving ACK LCALL RDBYT receiving data SETB C reading a byte C = 1 LCALL MACK send NAK LCALL STOP RET read completion
ORG 0000H
LJMP MAIN
SDA BIT P2.0
SCL BIT P2.1
MTD EQU 30H
MRD EQU 31H
读的总子程序
I2CREAD:
LCALL STA 起始
MOV A,#0A0H
LCALL WRBYT 发送芯片地址数据
LCALL CACK 接收ACK
MOV A,MRD
LCALL WRBYT 发送RAM地址数据
LCALL CACK 接收ACK
LCALL STA 起始
MOV A,#0A1H
LCALL WRBYT 发送地址数据
LCALL CACK 接收ACK
LCALL RDBYT 接收数据
SETB C 读一个字节C=1
LCALL MACK 发送NAK
LCALL STOP 读取完成
RET
- IIC EEPROM access to the data and the diode display ORG 0000H LJMP MAIN SDA BIT P2.0 SCL BIT P2.1 MTD EQU 30H MRD EQU 31H reading the total subprogram I2CREAD: LCALL STA starting MOV A,# 0A0H LCALL WRBYT send the chip address data LCALL CACK receiving ACK MOV A, MRD LCALL WRBYT send data RAM address LCALL CACK receiving ACK LCALL STA starting MOV A,# 0A1H LCALL WRBYT sending address data LCALL CACK receiving ACK LCALL RDBYT receiving data SETB C reading a byte C = 1 LCALL MACK send NAK LCALL STOP RET read completion
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