HT48R50A的 AT24C02 IIC 示例程序

                         MOV      A,OFFSET DEC_TO_HEX_TABLE
                         MOV      TBLP,A
                         MOV      A,OFFSET KEY_IN_ADD_BUFFER + 2
                         MOV      MP0,A
                         MOV      A,R0
                        ADDM    A,HT_DATA_ADD
                        DEC     MP0
                         MOV      A,R0
                        ADDM    A,TBLP
                        TABRDL  ACC
                        ADDM    A,HT_DATA_ADD
                        DEC     MP0
                         MOV      A,R0
                        SNZ     ACC.0
                        JMP     CHECK_ZERO
                         MOV      A,64H
                        ADDM    A,HT_DATA_ADD
                        JMP     CHECK_ERROR
CHECK_ZERO:
                         MOV      A,R0
                        SZ      ACC
                        JMP     DEC_TO_HEX_ERROR
                        JMP     DEC_TO_HEX_OK
CHECK_ERROR:
                         MOV      A,7FH
                        SUB     A,HT_DATA_ADD
                        SNZ     ACC.7
                        JMP     DEC_TO_HEX_OK
DEC_TO_HEX_ERROR:
                         MOV      A,ADDRESS_REGISTER
                         MOV      HT_DATA_ADD,A
                         MOV      A,ERROR
                        JMP     DEC_TO_HEX_END
DEC_TO_HEX_OK:
                         MOV      A,OK
DEC_TO_HEX_END:
                        RET
DEC_TO_HEX              ENDP
;--------------------------------------------------------------------
HEX_TO_HEX              PROC
                        CLR     HT_DATA
                         MOV      A,OFFSET KEY_IN_DATA_BUFFER + 1
                         MOV      MP0,A
                         MOV      A,R0
                        ADDM    A,HT_DATA
                        DEC     MP0
                         MOV      A,R0

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