Спосибо за информацию Verifi,
Вот и моя проблемма - нужно подключить RTC ( DS1307 ) к ADuC831, вводит дату и время и потом читать дату и время.
Проработал прогу, но не хочет записибать в 1307, вот прикреплю и асемблерскии фаѝлчик, посмотрите пожалуѝста и сказите где моя ошибка.
.....................................
; Program DS1307.ASM
;
; This program responds to commands received over the serial
; port to set the date/time as well as RAM data on the DS1307
; using a ADuC831 as a controller
;
$MOD831 ;use ADuC831 predefined symbols
;
; definitions
CR EQU 0DH
LF EQU 0AH
MCON EQU 0C6H
TA EQU 0C7H
SCL BIT P0.4
SDA BIT P0.3
TRIG BIT P0.2
DS1307W EQU 0D0H
DS1307R EQU 0D1H
FLAGS DATA 20H
LASTREAD BIT FLAGS.0
_12_24 BIT FLAGS.1
PM_AM BIT FLAGS.2
OSC BIT FLAGS.3
SQW BIT FLAGS.4
ACK BIT FLAGS.5
BUS_FAULT BIT FLAGS.6
_2W_BUSY BIT FLAGS.7
BITCOUNT DATA 21H
BYTECOUNT DATA 22H
BYTE DATA 23H
;____________________________________________________________________
; DEFINE VARIABLES IN INTERNAL RAM
BITCNT DATA 30h ; bit counter for I2C routines
SLAVEADD DATA 31h ; slave address for I2C routines
INPUT DATA 32h ; data recieved from the slave
OUTPUT DATA 33h ; data to be transmitted to slave
NOACK BIT 00h ; I2C no acknowledge flag
ERR BIT 00h ; I2C error flag
;
;____________________________________________________________________
; BEGINNING OF CODE
CSEG
ORG 0000h
AJMP START
;
;____________________________________________________________________
; INT0 ISR
ORG 0003h
INC OUTPUT
RETI
;
CSEG AT 30H
;*************************************************************
;*** RESET GOES HERE TO START PROGRAM ****
;*************************************************************
ORG 0060h
START:
; configure the UART ADuC831
MOV SCON,#52h ; configure UERT for 9600 baud
MOV TMOD,#20h ; assumihg 11.0592 MHz crystal
MOv TH1,#-3
SETB TR1
; configure & enable interrupts
SETB EX0 ; enable INT0
SETB IT0 ; INT0 edge triggered
SETB EA ; allow all the interrupts
; initialise settings
MOV SLAVEADD,#88H ; clear RW bit
MOV I2CCON,#0A8h ; sets SDATA & SCLOCK, and
; selects master mode
MOV OUTPUT,#0 ; TX 0 as default
CLR NOACK
CLR ERR
;-----------------------------------------------------------------------
; THIS IS THE MASTER CONTROLLER LOOP
;-----------------------------------------------------------------------
MASTER_CONTROLLER:
MOV BYTECOUNT,#10H
FORM_FEED: MOV A,#LF ; CLEAR SCREEN FOR MAIN MENU
LCALL WRITE_DATA
DJNZ BYTECOUNT,FORM_FEED
MOV DPTR, #TEXT0 ; PUT MAIN MENU ON SCREEN
LCALL WRITE_TEXT
MOV DPTR, #TEXT3
LCALL WRITE_TEXT
LCALL READ_DATA
CLR ACC.5 ; CONVERT ACC TO UPPER CASE
CJNE A,#'A',NOTA ; CALL SET CLOCK FUNCTION
LCALL SET_CLOCKM
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTA: CJNE A,#'B',NOTB ; CALL SET RAM FUNCTION AND
LCALL SET_RAM ; CALL READ RAM FUNCTION
LCALL READ_RAM
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTB: CJNE A,#'C',NOTC ; CALL READ CLOCK FUNCTION
LCALL READ_CLOCK
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTC: CJNE A,#'D',NOTD ; CALL READ RAM FUNCTION
LCALL READ_RAM
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTD: CJNE A,#'E',NOTE ; CALL OSC CONTROL FUNCTION
CLR OSC ; CLR OSC FLAG - ON
LCALL OSC_CONTROL
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTE: CJNE A,#'F',NOTF ; CALL OSC CONTROL FUNCTION
SETB OSC ; SET OSC FLAG - OFF
LCALL OSC_CONTROL
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTF: CJNE A,#'G',NOTG ; CALL SWQ CONTROL FUNCTION
CLR SQW ; CLR SQW FLAG - ON
LCALL SQW_CONTROL_1HZ
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTG: CJNE A,#'H',NOTH ; CALL SWQ CONTROL FUNCTION
CLR SQW ; CLR SQW FLAG - ON
LCALL SQW_CONTROL_4KHZ
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTH: CJNE A,#'I',NOTI ; CALL SWQ CONTROL FUNCTION
CLR SQW ; CLR SQW FLAG - ON
LCALL SQW_CONTROL_8KHZ
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTI: CJNE A,#'J',NOTJ ; CALL SWQ CONTROL FUNCTION
CLR SQW ; CLR SQW FLAG - ON
LCALL SQW_CONTROL_32KHZ
JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
NOTJ: CJNE A,#'K',NOTK ; CALL SWQ CONTROL FUNCTION
SETB SQW ; SET SQW FLAG - OFF
LCALL SQW_CONTROL_1HZ
JMP MASTER_CONTROLLER
NOTK: CJNE A,#'L',NOTL
LCALL SET_RAM_UNQ
LCALL READ_RAM
NOTL: JMP MASTER_CONTROLLER ; RETURN TO MAIN MENU
;-----------------------------------------------------------------------
; THIS SUB SENDS THE START CONDITION
;-----------------------------------------------------------------------
SEND_START: ; Sends the start bit to initiate an I2C communication
SETB MDE ; enable SDATA pin as an output
CLR NOACK
CLR MDO ; low O/P on SDATA
CLR MCO ; start bit
RET
;
;-----------------------------------------------------------------------
; THIS SUB SENDS THE STOP CONDITION
;-----------------------------------------------------------------------
SEND_STOP: ; Sends the stop bit to end an I2C transmission
SETB MDE ; to enable SDATA pin as an output
CLR MDO ; get SDATA ready for stop
SETB MCO ; set clock for stop
SETB MDO ; this is the stop bit
RET
;
;-----------------------------------------------------------------------
; THIS SUB SENDS ONE BYTE OF DATA TO THE DS1307
;-----------------------------------------------------------------------
SEND_BYTE: ; Send 8-bits in ACC to the slave
MOV BITCNT,#8 ; 8 bits in a byte
SETB MDE ; to enable SDATA pin as an output
CLR MCO ; make sure that the clock line is low
SENDBIT:
RLC A ; put data bit to be sent into carry
MOV MDO,C ; put data bit on SDATA line
SETB MCO ; clock to send bit
CLR MCO ; clear clock
DJNZ BITCNT,SENDBIT ; jump back and send all eight bits
CLR MDE ; release data line for acknowledge
SETB MCO ; send clock for acknowledge
JNB MDI,NEXT ; this is a check for acknowledge
SETB NOACK ; no acknowledge, set flag
NEXT: CLR MCO ; clear clock
RET
;
;-----------------------------------------------------------------------
; THIS SUB READS ONE BYTE OF DATA FROM THE DS1307
;-----------------------------------------------------------------------
READ_BYTE: ; receives one byte of data from an I2C slave device. Returns it in A
MOV BITCNT,#8 ; Set bit count.
CLR MDE ; to enable SDATA pin as an input
CLR MCO ; make sure the clock line is low
RCVBIT:
SETB MCO ; clock to recieve bit
CLR MCO ; clear clock
MOV C,MDI ; read data bit into carry.
RLC A ; Rotate bit into result byte.
DJNZ BITCNT,RCVBIT ; Repeat until all bits received.
; recieved byte is in the accumulator
SETB MDE ; Data pin =Output for NACK
SETB MDO ; Send NACK (always send NACK for
; last byte in transmission)
SETB MCO ; Send NACK clock.
CLR MCO
RET
;
;----------------------------------------------------------------------- ;
; THIS SUB SETS THE CLOCK LINE HIGH
;-----------------------------------------------------------------------
SCL_HIGH:
SETB SCL ; SET SCL HIGH
JNB SCL,$ ; LOOP UNTIL STRONG 1 ON SCL
RET
;----------------------------------------------------------------------- ;
; THIS SUB DELAY THE BUS
;-----------------------------------------------------------------------
; DELAY
; DELAY ROUTINE FOR THE ADuC812/ADuC816/ADuC824
DELAY: ; Delays by 100ms * A
; ADuC812 100ms based on 11.0592MHz Core Clock
; ADuC824 100ms based on 1.573MHz Core Clock
MOV R2,A ; Acc holds delay variable
DLY0: MOV R3,#200 ; Set up delay loop0
DLY1: MOV R4,#229 ; Set up delay loop1
DJNZ R4,$ ; Dec R4 & Jump here until R4 is 0
; wait here for 131*15.3us=2ms
DJNZ R3,DLY1 ; Dec R3 & Jump DLY1 until R3 is 0
; Wait for 50*2ms
DJNZ R2,DLY0 ; Dec R2 & Jump DLY0 until R2 is 0
; wait for ACC*100ms
RET ; Return from subroutine
;
;-----------------------------------------------------------------------
; THIS SUB DELAYS 4 CYCLES
;-----------------------------------------------------------------------
DELAY_4:
NOP ; DELAY FOR BUS TIMING
NOP
NOP
NOP
RET
;-----------------------------------------------------------------------
; THIS SUB SETS THE CLOCK (MANUAL)
;-----------------------------------------------------------------------
SET_CLOCKM:
MOV R1,#2EH ; SET R1 TO SCRATCHPAD MEMORY FOR DATE/TIME
MOV DPTR, #GODINA ; GET THE DATE/TIME INFORMATION FROM THE
LCALL WRITE_TEXT ; USER. WRITE THE DATE/TIME TO SCRATCHPAD
LCALL READ_BCD ; MEMORY
MOV @R1,A
DEC R1
MOV DPTR, #MESEC
LCALL WRITE_TEXT
LCALL READ_BCD
MOV @R1,A
DEC R1
MOV DPTR, #DATATA
LCALL WRITE_TEXT
LCALL READ_BCD
MOV @R1,A
DEC R1
MOV DPTR, #DEN
LCALL WRITE_TEXT
LCALL READ_BCD
ANL A, #7
MOV @R1,A
DEC R1
MOV DPTR, #CHAS
LCALL WRITE_TEXT
LCALL READ_BCD
MOV @R1,A
DEC R1
MOV DPTR, #MINUTI
LCALL WRITE_TEXT
LCALL READ_BCD
MOV @R1,A
DEC R1
MOV DPTR, #SEKUNDI
LCALL WRITE_TEXT
LCALL READ_BCD
MOV @R1,A
MOV R1,#28H ; POINT TO BEGINNING OF CLOCK DATA IN SCRATCHPAD MEMORY
LCALL SEND_START ; SEND 2WIRE START CONDITION
MOV A,#DS1307W ; SEND DS1307 WRITE COMMAND
LCALL SEND_BYTE
MOV A,#00H ; SET DATA POINTER TO REGISTER 00H ON
LCALL SEND_BYTE ; THE DS1307
SEND_LOOP:
MOV A,@R1 ; MOVE THE FIRST BYTE OF DATA TO ACC
LCALL SEND_BYTE ; SEND DATA ON 2WIRE BUT
INC R1
CJNE R1,#2FH,SEND_LOOP ; LOOP UNTIL CLOCK DATA SENT TO DS1307
LCALL SEND_STOP ; SEND 2WIRE STOP CONDITION
RET
;-----------------------------------------------------------------------
; THIS SUB SETS THE DS1307 USER RAM TO THE VALUE IN 'BYTE'
;-----------------------------------------------------------------------
SET_RAM:
MOV R1,#08H ; POINTER TO BEGINNING OF DS1307 USER RAM
MOV DPTR, #TEXT5 ; MESSAGE TO ENTER DATA BYTE
LCALL WRITE_TEXT ;
LCALL READ_BCD ; READ BYTE FROM KEYBOARD
MOV BYTE,A ; AND STORE IN 'BYTE'
LCALL SEND_START ; SEND 2WIRE START CONDITION
MOV A,#DS1307W ; LOAD DS1307 WRITE COMMAND
LCALL SEND_BYTE ; SEND WRITE COMMAND
MOV A,#08H ; SET DS1307 DATA POINTER TO BEGINNING
LCALL SEND_BYTE ; OF USER RAM - 08H
SEND_LOOP2:
MOV A,BYTE ; WRITE BYTE TO ENTIRE RAM SPACE
LCALL SEND_BYTE ; WHICH IS 08H TO 37H
INC R1
CJNE R1,#040H,SEND_LOOP2 ; LOOP UNTIL RAM FILLED
LCALL SEND_STOP ; SEND 2WIRE STOP CONTION
RET
;-----------------------------------------------------------------------
; THIS SUB SETS THE DS1307 USER RAM TO THE UNIQUE PATTERN
;-----------------------------------------------------------------------
SET_RAM_UNQ:
MOV R1,#08H ; POINTER TO BEGINNING OF DS1307 USER RAM
LCALL SEND_START ; SEND 2WIRE START CONDITION
MOV A,#DS1307W ; LOAD DS1307 WRITE COMMAND
LCALL SEND_BYTE ; SEND WRITE COMMAND
MOV A,#08H ; SET DS1307 DATA POINTER TO BEGINNING
LCALL SEND_BYTE ; OF USER RAM - 08H
SEND_LOOP3:
LCALL SEND_BYTE ; WHICH IS 08H TO 37H
INC R1
INC A
CJNE R1,#040H,SEND_LOOP3 ; LOOP UNTIL RAM FILLED
LCALL SEND_STOP ; SEND 2WIRE STOP CONTION
RET
;-----------------------------------------------------------------------
; THIS SUB READS THE DS1307 RAM AND WRITES IT TO THE SCRATCH PAD MEMORY
;-----------------------------------------------------------------------
READ_RAM:
MOV DPTR,#TEXT4 ; SEND KEY PRESS MSG
LCALL WRITE_TEXT
MOV R1,#30H ; START OF RAM REGS IN SCRATCH PAD
MOV BYTECOUNT,#00H ; COUNTER FOR 56 RAM BYTES
CLR LASTREAD ; FLAG TO CHECK FOR LAST READ
LCALL SEND_START ; SEND 2WIRE START CONDITION
MOV A,#DS1307W ; SEND DS1307 WRITE COMMAND
LCALL SEND_BYTE
MOV A,#08H ; SET POINTER TO REG 08H ON
;DS1307
LCALL SEND_BYTE
LCALL SEND_STOP ; SEND STOP CONDITION
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307R ; SEND DS1307 READ COMMAND
LCALL SEND_BYTE
READ_LOOP2:
MOV A,BYTECOUNT ; CHECK TO SEE OF DOING LAST READ
CJNE A,#37H,NOT_LAST2
SETB LASTREAD ; IF LAST READ SET LASTREAD FLAG
NOT_LAST2:
LCALL READ_BYTE ; READ A BYTE OF DATA
MOV @R1,A ; MOVE DATA INTO SCRATCHPAD MEMORY
INC R1 ; INC POINTERS
INC BYTECOUNT
MOV A,BYTECOUNT
CJNE A,#38H,READ_LOOP2 ; LOOP FOR ENTIRE DS1307 RAM
LCALL SEND_STOP ; SEND 2WIRE STOP CONDITION
LCALL DISP_RAM ; DISPLAY DATA IN SCRATCHPAD MEMORY
JNB RI,$ ;WAIT UNTIL A KEY IS PRESSED
CLR RI
RET
;-----------------------------------------------------------------------
; THIS SUB DISPLAYS THE RAM DATA SAVED IN SCRATCHPAD MEMORY
;-----------------------------------------------------------------------
DISP_RAM:
MOV R1,#30H ;START OF RAM IN SCRATCHPAD
;MEMORY
MOV BITCOUNT,#00H
MOV DPTR,#TEXT6 ;DISPLAY TABLE HEADING
LCALL WRITE_TEXT
DISP_ADDR:
LCALL DISP_LOC ; DISPLAY VALUE OF CURRENT RAM LOCATION
DIS_LOOP:
MOV A,@R1 ; DISPLAY RAM DATA SAVED IN SCRATCHPAD
LCALL WRITE_BCD ; CONVERT TO BCD FORMAT AND DISPLAY
INC R1
INC BITCOUNT
MOV A,#20H ; SPACE BETWEEN DATA BYTES
LCALL WRITE_DATA
MOV A,BITCOUNT
CJNE A,#08H,DIS_LOOP ; LINE FEED AFTER 8 BYTES OF DATA
MOV BITCOUNT,#00H
MOV DPTR,#TEXT3 ; 'CR,LF'
LCALL WRITE_TEXT
CJNE R1,#68H,DISP_ADDR ; DISPLAY DATA FOR 56 BYTES OF RAM
RET
;----------------------------------------------------------------------- ;
; THIS SUB WRITES THE RAM LOCATION OF THE DATA
;-----------------------------------------------------------------------
DISP_LOC:
MOV A,R1 ; DISPLAY THE HEX VALUE FOR THE DATA
ADD A,#-28H ; IN THE DS1307 RAM SPACE
LCALL WRITE_BCD ; CONVERTS SCRATCHPAD ADDRESS
MOV A,#20H ; INTO DS1307 RAM ADDRESS
LCALL WRITE_DATA
MOV A,#20H
LCALL WRITE_DATA
MOV A,#20H
LCALL WRITE_DATA
RET
;-----------------------------------------------------------------------
; THIS SUB READS THE CLOCK AND WRITES IT TO THE SCRATCH PAD MEMORY ;
;-----------------------------------------------------------------------
READ_CLOCK:
MOV DPTR,#TEXT4 ; KEY PRESS MSG
LCALL WRITE_TEXT
READ_AGAIN:
MOV R1,#28H ; START OF CLOCK REG IN SCRATCHPAD
MOV BYTECOUNT,#00H ; COUNTER UP TO 8 BYTES FOR CLOCK
CLR LASTREAD ; FLAG TO CHECK FOR LAST READ
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 00H ON DS1307
LCALL SEND_BYTE
MOV A,#00H
LCALL SEND_BYTE
LCALL SEND_STOP ; SEND STOP CONDITION
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307R ; SEND READ COMMAND TO DS1307
LCALL SEND_BYTE
READ_LOOP:
MOV A,BYTECOUNT ; CHECK TO SEE OF DOING LAST READ
CJNE A,#07H,NOT_LAST
SETB LASTREAD ; SET LASTREAD FLAG
NOT_LAST:
LCALL READ_BYTE ; READ A BYTE OF DATA
MOV @R1,A ; MOVE DATA IN SCRATCHPAD MEMORY
MOV A,BYTECOUNT ; CHECK TO SEE IF READING SECONDS REG
CJNE A,#00H,NOT_FIRST
CLR OSC ; CLR OSC FLAG
MOV A,@R1 ; MOVE SECONDS REG INTO ACC
JNB ACC.7,NO_OSC ; JUMP IF BIT 7 OF IS A 0
SETB OSC ; SET OSC FLAG, BIT 7 IS A 1
CLR ACC.7 ; CLEAR BIT 7 FOR DISPLAY
; PURPOSES
MOV @R1,A ; MOVE DATA BACK TO SCRATCHPAD
NO_OSC:
NOT_FIRST:
INC R1 ; INC COUNTERS
INC BYTECOUNT
MOV A,BYTECOUNT
CJNE A,#08H,READ_LOOP ; LOOP FOR ENTIRE CLOCK REGISTERS
LCALL SEND_STOP ; SEND 2WIRE STOP CONDITION
LCALL DISP_CLOCK ; DISPLAY DATE/TIME FROM SCRATCHPAD
JNB RI,READ_AGAIN ; READ AND DISPLAY UNTIL A KEY IS PRESSED
CLR RI
RET
;-----------------------------------------------------------------------
; THIS SUB DISPLAYS THE DATE AND TIME SAVED IN SCRATCHPAD MEMORY
;-----------------------------------------------------------------------
DISP_CLOCK:
MOV DPTR,#TEXT1 ; DATE:
LCALL WRITE_TEXT
MOV R1,#2DH ; MONTH
MOV A,@R1
LCALL WRITE_BCD
MOV A,#'/'
LCALL WRITE_DATA
MOV R1,#2CH ; DATE
MOV A,@R1
LCALL WRITE_BCD
MOV A,#'/'
LCALL WRITE_DATA
MOV R1,#2EH ; YEAR
MOV A,@R1
LCALL WRITE_BCD
MOV A,#09H ; TAB
LCALL WRITE_DATA
MOV DPTR,#TEXT2 ; TIME:
LCALL WRITE_TEXT
MOV R1,#2AH ; HOURS
MOV A,@R1
LCALL WRITE_BCD
MOV A,#3AH ; COLON
LCALL WRITE_DATA
MOV R1,#29H ; MINUTES
MOV A,@R1
LCALL WRITE_BCD
MOV A,#3AH ; COLON
LCALL WRITE_DATA
MOV R1,#28H ; SECONDS
MOV A,@R1
LCALL WRITE_BCD
RET
;-----------------------------------------------------------------------
; THIS SUB SETS THE OSCILLATOR ACCORDING TO THE OSC BIT
;-----------------------------------------------------------------------
OSC_CONTROL:
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 00H ON DS1307
LCALL SEND_BYTE
MOV A,#00H
LCALL SEND_BYTE
SETB LASTREAD ; SET LAST READ FOR SINGLE READ
LCALL SEND_STOP ; SEND STOP CONDITION
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307R ; SEND READ COMMAND TO DS1307
LCALL SEND_BYTE
LCALL READ_BYTE ; READ SECONDS REGISTER
CLR ACC.7 ; TURN OSC ON
JNB OSC,OSC_SET
SETB ACC.7 ; TURN OSC OFF IF OSC BIT IS SET IN
OSC_SET: ; SECONDS REGISTER
PUSH ACC ; SAVE SECONDS DATA ON STACK
LCALL SEND_STOP ; SEND STOP CONDITION
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 00H ON DS1307
LCALL SEND_BYTE
MOV A,#00H
LCALL SEND_BYTE
POP ACC ; SEND SECONDS REGISTER TO CONTROL
LCALL SEND_BYTE ; OSCILLATOR ON DS1307
LCALL SEND_STOP
RET
;-----------------------------------------------------------------------
; THIS SUB CONTROLS THE SQW OUTPUT 1HZ
;-----------------------------------------------------------------------
SQW_CONTROL_1HZ:
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 07H ON DS1307
LCALL SEND_BYTE
MOV A,#07H
LCALL SEND_BYTE
MOV A,#90H ; SQW/OUT ON AT 1HZ
JNB SQW,SQW_SET ; JUMP IF SQW BIT IS ACTIVE
MOV A,#80H ; TURN SQW/OUT OFF - OFF HIGH
SQW_SET:
LCALL SEND_BYTE
LCALL SEND_STOP
RET
;-----------------------------------------------------------------------
; THIS SUB CONTROLS THE SQW OUTPUT 4KHZ
;-----------------------------------------------------------------------
SQW_CONTROL_4KHZ:
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 07H ON DS1307
LCALL SEND_BYTE
MOV A,#07H
LCALL SEND_BYTE
MOV A,#91H ; SQW/OUT ON AT 1HZ
JNB SQW,SQW_SET1 ; JUMP IF SQW BIT IS ACTIVE
MOV A,#80H ; TURN SQW/OUT OFF - OFF HIGH
SQW_SET1:
LCALL SEND_BYTE
LCALL SEND_STOP
RET
;-----------------------------------------------------------------------
; THIS SUB CONTROLS THE SQW OUTPUT 8KHZ
;-----------------------------------------------------------------------
SQW_CONTROL_8KHZ:
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 07H ON DS1307
LCALL SEND_BYTE
MOV A,#07H
LCALL SEND_BYTE
MOV A,#92H ; SQW/OUT ON AT 1HZ
JNB SQW,SQW_SET2 ; JUMP IF SQW BIT IS ACTIVE
MOV A,#80H ; TURN SQW/OUT OFF - OFF HIGH
SQW_SET2:
LCALL SEND_BYTE
LCALL SEND_STOP
RET
;-----------------------------------------------------------------------
; THIS SUB CONTROLS THE SQW OUTPUT 32KHZ
;-----------------------------------------------------------------------
SQW_CONTROL_32KHZ:
LCALL SEND_START ; SEND START CONDITION
MOV A,#DS1307W ; SET POINTER TO REG 07H ON DS1307
LCALL SEND_BYTE
MOV A,#07H
LCALL SEND_BYTE
MOV A,#93H ; SQW/OUT ON AT 1HZ
JNB SQW,SQW_SET3 ; JUMP IF SQW BIT IS ACTIVE
MOV A,#80H ; TURN SQW/OUT OFF - OFF HIGH
SQW_SET3:
LCALL SEND_BYTE
LCALL SEND_STOP
RET
;-----------------------------------------------------------------------
; THIS SUB IS A SCOPE TRIGGER BIT
;-----------------------------------------------------------------------
TRIGGER:
CLR TRIG
SETB TRIG
LCALL DELAY_4
CLR TRIG
RET
;-----------------------------------------------------------------------
; THIS SUB READS DATA FROM THE SCREEN AND CONVERTS IT TO BCD FORM
; DATA SHOULD BE HEX DIGITS: 1,2,3...9,A,B,C,D,E,F
;-----------------------------------------------------------------------
READ_BCD:
MOV R0,#0 ; CLEAR R0
BCD_LOOP:
LCALL READ_DATA ; READ BYTE FROM KEYBOARD
CJNE A, #0DH, BCD ; CHECK FOR CR
MOV A,R0 ; MOVE R0 TO ACC AND RETURN
RET
BCD:
ADD A,#-30H ; BEGIN TO CONVERT TO ACTUAL VALUE
JNB ACC.4,DIGIT ; JUMP IF NOT A-F
ADD A,#-07H ; IF A-F SUBTRACT 7
DIGIT:
ANL A,#0FH ; ENSURE BITS 4-7 ARE CLEARED
ANL 0,#0FH ; ENSURE BITS 4-7 ARE CLEARED
XCH A,R0 ; EXCHANGE R0 AND ACC
SWAP A ; NIBBLE SWAP ACC
ORL A,R0 ; INSERT BITS 0-3 OF R0 INTO ACC
MOV R0,A ; MOVE ACC INTO R0
SJMP BCD_LOOP ; LOOP UNTIL CR ENCOUNTERED
;-----------------------------------------------------------------------
; THIS SUB WRITES THE BYTE TO THE SCREEN
;-----------------------------------------------------------------------
WRITE_BCD:
PUSH ACC ; SAVE ACC ON STACK
SWAP A ; NIBBLE SWAP ACC
ANL A,#0FH ; CLEAR BITS 4-7 OF ACC
ADD A,#07H ; ADD 7 TO ACC TO CONVERT TO ASCII HEX
JNB ACC.4,LESSNINE ; CHECK TO SEE IF LESS THAN NINE 0-8
CJNE A,#10H,NOTNINE ; JUMP IS GREATER THAN NINE A-F
LESSNINE:
ADD A,#-07H ; SUBTRACT 7 FOR 0-9
NOTNINE:
ADD A,#30H ; ADD 30 TO CONVERT TO ASCII EQUIVALENT
LCALL WRITE_DATA ; WRITE BYTE TO SCREEN
POP ACC ; RECALL ACC FROM STACK
ANL A,#0FH ; PERFORM CONVERSION ON OTHER HALF OF BYTE
ADD A,#07H
JNB ACC.4,NINE2
CJNE A,#10H,NOTNINE2
NINE2:
ADD A,#-07H
NOTNINE2:
ADD A,#30H
LCALL WRITE_DATA
RET
;-----------------------------------------------------------------------
READ_DATA:
JNB RI,READ_DATA ; LOOP WHILE RI BIT IS LOW
CLR RI ;
MOV A,SBUF ; GET DATA BYTE FROM SERIAL BUFFER
RET
;-----------------------------------------------------------------------
WRITE_DATA:
JNB TI,WRITE_DATA ; LOOP WHILE TI BIT IS LOW
CLR TI ;
MOV SBUF,A ; SEND DATA BYTE TO SERIAL
; BUFFER
RET
;-----------------------------------------------------------------------
WRITE_TEXT:
PUSH ACC ; SAVE ACC BYTE ON STACK
WT1:
CLR A ; CLEAR ACC
MOVC A,@A+DPTR ; MOVE FIRST BYTE OF STRING
; TO ACC
INC DPTR ; INC DATA POINTER
CJNE A,#0,WT2 ; CHECK FOR STRING
; TERMINATOR - 0
POP ACC ; RESTORE ACC
RET ; RETURN WHEN STRING IS SENT
WT2:
LCALL WRITE_DATA ; SEND BYTE OF STRING OVER SERIAL PORT
SJMP WT1
;-----------------------------------------------------------------------
; TEXT STRINGS USED FOR USER INTERFACE OVER SERIAL PORT
;-----------------------------------------------------------------------
GODINA:
DB CR,LF,'GODINA (0 - 99) : ',0
MESEC:
DB CR,LF,'MESEC (1 - 12) : ',0
DATATA:
DB CR,LF,'DATA OT MESECA : ',0
DEN:
DB CR,LF,'DEN OT SEDMICATA : ',0
CHAS:
DB CR,LF,'CHAS (0 - 24) : ',0
MINUTI:
DB CR,LF,'MINUTI (0 - 59) : ',0
SEKUNDI:
DB CR,LF,'SEKUNDI (0 - 59) : ',0
TRIER:
DB CR,LF,'PRESS ANY KEY TO SET THIS TIME ',CR,LF,0
TEXT0:
DB CR,LF,'******* DALLAS SEMICONDUCTOR ******** '
DB CR,LF,'******* DS1307 TEST PROGRAM ******** ',CR,LF
DB CR,LF,'*PLEASE CHOOSE AN OPTION TO CONTINUE* '
DB CR,LF,'------------------------------------- '
DB CR,LF,'A. SET TIME(MANUAL) B. SET RAM '
DB CR,LF,'C. READ DATE/TIME D. READ RAM '
DB CR,LF,'E. OSC ON F. OSC OFF '
DB CR,LF
DB CR,LF,'G. SQW/OUT ON-1HZ H. SQW/OUT ON-4KHZ'
DB CR,LF,'I. SQW/OUT ON-8KHZ J. SQW/OUT ON-32KHZ'
DB CR,LF
DB CR,LF,'K. SQW/OUT OFF'
DB CR,LF,'L. WRITE RAM UNIQUE PATTERN '
DB CR,LF,'ESC. TO QUIT ',0
TEXT1:
DB CR,'DATE: ',0
TEXT2:
DB 'TIME: ',0
TEXT3:
DB CR,LF,0
TEXT4:
DB CR,LF,'PRESS ANY KEY TO RETURN'
DB CR,LF,0
TEXT5:
DB CR,LF,'ENTER THE BYTE VALUE WHICH WILL FILL THE RAM'
DB CR,LF,0
TEXT6:
DB CR,LF,'RAM RAM'
DB CR,LF,'ADDR DATA'
DB CR,LF,'-----------------------------'
DB CR,LF,0
;******************************************
;**** END OF PROGRAM ************
;******************************************
END
