Maxim Integrated Secure Microcontroller - Manual (Page 174)

Secure Microcontroller User’s Guide
174 of 187
ADD A, #7
HEX_OK:
ADD A, #30H
LCALL CHAR_OUT
POP ACC
DJNZ B, OUT_LP
RET
;
TEXT_OUT:
PUSH ACC
WT1:
CLR A
MOVC A, @A+DPTR
INC DPTR
JZ WT2
LCALL CHAR_OUT
SJMP WT1
WT2:
POP ACC
RET
;
CHAR_IN:
JNB RI, CHAR_IN
MOV A, SBUF
CLR RI
RET
;
CHAR_OUT:
JNB TI, CHAR_OUT
MOV SBUF, A
CLR TI
RET
;
RBYTE:
PUSH MCON ; Save MCON register.
ORL MCON, #4 ; Switch to PES.
MOVX A, @R0 ; Read the register.
DEC R0 ; Decrement the pointer.
POP MCON ; Restore MCON register.
RET ; Return.
;
WBYTE:
PUSH MCON ; Save MCON register.
ORL MCON, #4 ; Switch to PES.
MOVX @R0, A ; Read the register.
DEC R0 ; Decrement the pointer.
POP MCON ; Restore MCON register.
RET ; Return.
;
YEAR:
DB CR,LF,’YEAR (0 – 99) : ’,0
MONTH:
DB CR,LF,’MONTH (1 – 12) : ’,0
DAY:
DB CR,LF,’DAY OF MONTH : ’,0
DAYW:
DB CR,LF,’DAY OF WEEK : ’,0
HOUR:
DB CR,LF,’HOUR (0 – 23) : ’,0
MINUTE:
DB CR,LF,’MINUTE (0 – 59) : ’,0