?? ds1302.lst
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A51 MACRO ASSEMBLER DS1302 11/04/2008 14:17:15 PAGE 1
MACRO ASSEMBLER A51 V7.00a
OBJECT MODULE PLACED IN DS1302.OBJ
ASSEMBLER INVOKED BY: d:\Keil\C51\BIN\A51.EXE DS1302.asm SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
1 ;
2 ;//*DS1302 PIN:
3 ;//*
4 ;//* SCLK (Serial Clock Input) - SCLK is used to synchronize data movement on
5 ;//* the serial interface. This pin has a 40k. internal pull-down resistor.
0092 6 p1302SCLK BIT P1.2
7 ;//* I/O (Data Input/Output) - The I/O pin is the bi-directional data pin for
8 ;//* the 3-wire interface. This pin has a 40k. internal pull-down resistor.
0093 9 p1302IO BIT P1.3
10 ;//* RST (Reset) - The reset signal must be asserted high during a read or a
11 ;//* write. This pin has a 40k.internal pull-down resistor.
0094 12 p1302RST BIT P1.4
13
14 ;//* DS1302 Command code
0080 15 SecondWCom EQU 0x80
0081 16 SecondRDCom EQU 0x81
0082 17 MinuteWCom EQU 0x82
0083 18 MinuteRDCom EQU 0x83
0084 19 HourWCom EQU 0x84
0085 20 HourRDCom EQU 0x85
0086 21 DateWCom EQU 0x86 ;//* How much day of a month
0087 22 DateRDCom EQU 0x87
0088 23 MonthWCom EQU 0x88
0089 24 MonthRDCom EQU 0x89
008A 25 DayWCom EQU 0x8A ;//* How much day of a week
008B 26 DayRDCom EQU 0x8B
008C 27 YearWCom EQU 0x8C
008D 28 YearRDCom EQU 0x8D
29 ;//*
008E 30 ControlWCom EQU 0x8E ;//* enable only 7 bit, 7bit=0 may operate all register
31 ;//* of DS1302
008F 32 ControRDCom EQU 0x8F ;//* only 7bit availability, 0-6bit = 0
0090 33 TrChaWCom EQU 0x90 ;//* This register controls the trickle charge
34 ;//* characteristics of the DS1302.
0091 35 TrChaRDCom EQU 0x91 ;//* The trickle charge select (TCS) bits (bits 4-7)
36 ;//* control the selection of the trickle c
harger. In
37 ;//* order to prevent accidental enabling,
only a
38 ;//* pattern of 1010 will enable the trickl
e charger.
00BE 39 CBurstWCom EQU 0xBE ;//* The clock/calendar command byte specifies burst
40 ;//* mode operation. In this mode the first
eight
00BF 41 CBurstRDCom EQU 0xBF ;//* clock/calendar registers can be consecutively read
42 ;//* or written starting with bit 0 of addr
ess 0.
43 ;//* DS1302 inside buffer command code(0-31)
00C0 44 DSBufWCom0 EQU 0xC0
00C1 45 DSBufRDCom0 EQU 0xC1
46 ;//* .
47 ;//* .
48 ;//* .
00FC 49 DSBufWCom30 EQU 0xFC
00FD 50 DSBuRDCom30 EQU 0xFD
00FE 51 DSBufBurWC EQU 0xFE ;//* The RAM command byte specifies burst mode operation.
52 ;//* In this mode, the 31 RAM registers can
be
A51 MACRO ASSEMBLER DS1302 11/04/2008 14:17:15 PAGE 2
00FF 53 DSBufBurRDC EQU 0xFF ;//* consecutively read or written starting with bit 0
54 ;//* of address 0.
55
56 ;//* date and time buffer
0030 57 vYearBuf EQU 0x30
0031 58 vMonthBuf EQU 0x31
0032 59 vDateBuf EQU 0x32
0033 60 vDayBuf EQU 0x33
0034 61 vHourBuf EQU 0x34
0035 62 vMinuteBuf EQU 0x35
0036 63 vSecondBuf EQU 0x36
64
65 ;//*
66 ;//* **************************************************************
67 ;//*
0000 68 ORG 0x0000
0000 0130 69 AJMP Start
0030 70 ORG 0x0030
0030 71 Start:
0030 758160 72 MOV SP, #0x60
0033 787F 73 MOV R0, #0x7F
0035 74 ClearRAM:
0035 7600 75 MOV @R0, #0
0037 D8FC 76 DJNZ R0, ClearRAM
77
0039 759850 78 MOV SCON, #0x50;
003C 758921 79 MOV TMOD, #0x21; //Timer0 - 16bit timer mode
80
003F 758BFD 81 MOV TL1, #253;
0042 758DFD 82 MOV TH1, #253;
83
0045 D28E 84 SETB TR1
0047 D299 85 SETB TI
86
0049 00 87 NOP
004A 00 88 NOP
89
004B 90 aaaa:
004B 00 91 NOP
004C 00 92 NOP
004D 2097FB 93 JB P1.7, aaaa
0050 C290 94 CLR P1.0
0052 C291 95 CLR P1.1
0054 1201B0 96 LCALL Delay1s
0057 D291 97 SETB P1.1
0059 D290 98 SETB P1.0
005B 1201B0 99 LCALL Delay1s
005E 014B 100 AJMP aaaa
101
102
0060 120168 103 LCALL INITDS1302
0063 00 104 NOP
0064 00 105 NOP
0065 106 Loop:
0065 1200B0 107 LCALL ReadTime
0068 00 108 NOP
0069 C299 109 CLR TI
006B 853099 110 MOV SBUF, vYearBuf
006E 3099FD 111 JNB TI, $
112
0071 C299 113 CLR TI
0073 853199 114 MOV SBUF, vMonthBuf
0076 3099FD 115 JNB TI, $
116
0079 C299 117 CLR TI
007B 853299 118 MOV SBUF, vDateBuf
A51 MACRO ASSEMBLER DS1302 11/04/2008 14:17:15 PAGE 3
007E 3099FD 119 JNB TI, $
120
0081 C299 121 CLR TI
0083 853399 122 MOV SBUF, vDayBuf
0086 3099FD 123 JNB TI, $
124
0089 C299 125 CLR TI
008B 853499 126 MOV SBUF, vHourBuf
008E 3099FD 127 JNB TI, $
128
0091 C299 129 CLR TI
0093 853599 130 MOV SBUF, vMinuteBuf
0096 3099FD 131 JNB TI, $
132
0099 C299 133 CLR TI
009B 853699 134 MOV SBUF, vSecondBuf
009E 3099FD 135 JNB TI, $
00A1 7E00 136 MOV R6, #0
00A3 137 Del:
00A3 7F00 138 MOV R7, #0
00A5 DFFE 139 DJNZ R7, $
00A7 DEFA 140 DJNZ R6, Del
00A9 0165 141 AJMP Loop
00AB 00 142 NOP
143 ; LCALL WriteTime
00AC 00 144 NOP
00AD 00 145 NOP
00AE 01AE 146 AJMP $
147 ;//* **************************************************************
148 ;//* Get year month date hour minute second
149 ;//*
00B0 150 ReadTime:
00B0 748D 151 MOV A, #YearRDCom
00B2 12011B 152 LCALL RDInfoFromDS1302
00B5 F530 153 MOV vYearBuf, A
00B7 7489 154 MOV A, #MonthRDCom
00B9 12011B 155 LCALL RDInfoFromDS1302
00BC F531 156 MOV vMonthBuf, A
00BE 7487 157 MOV A, #DateRDCom
00C0 12011B 158 LCALL RDInfoFromDS1302
00C3 F532 159 MOV vDateBuf, A
00C5 7485 160 MOV A, #HourRDCom
00C7 12011B 161 LCALL RDInfoFromDS1302
00CA F534 162 MOV vHourBuf, A
00CC 7483 163 MOV A, #MinuteRDCom
00CE 12011B 164 LCALL RDInfoFromDS1302
00D1 F535 165 MOV vMinuteBuf, A
00D3 7481 166 MOV A, #SecondRDCom
00D5 12011B 167 LCALL RDInfoFromDS1302
00D8 F536 168 MOV vSecondBuf, A
00DA 748B 169 MOV A, #DayRDCom
00DC 12011B 170 LCALL RDInfoFromDS1302
00DF F533 171 MOV vDayBuf, A
00E1 22 172 RET
173 ;//* **************************************************************
174 ;//* set year month date hour minute second
175 ;//*
00E2 176 WriteTime:
00E2 748C 177 MOV A, #YearWCom
00E4 8530F0 178 MOV B, vYearBuf
00E7 120140 179 LCALL WInfoToDS1302
00EA 7486 180 MOV A, #DateWCom
00EC 8532F0 181 MOV B, vDateBuf
00EF 120140 182 LCALL WInfoToDS1302
00F2 7488 183 MOV A, #MonthWCom
00F4 8531F0 184 MOV B, vMonthBuf
A51 MACRO ASSEMBLER DS1302 11/04/2008 14:17:15 PAGE 4
00F7 120140 185 LCALL WInfoToDS1302
00FA 7484 186 MOV A, #HourWCom
00FC 8534F0 187 MOV B, vHourBuf
00FF 120140 188 LCALL WInfoToDS1302
0102 7480 189 MOV A, #SecondWCom
0104 8536F0 190 MOV B, vSecondBuf
0107 120140 191 LCALL WInfoToDS1302
010A 7482 192 MOV A, #MinuteWCom
010C 8535F0 193 MOV B, vMinuteBuf
010F 120140 194 LCALL WInfoToDS1302
0112 748A 195 MOV A, #DayWCom
0114 8533F0 196 MOV B, vDayBuf
0117 120140 197 LCALL WInfoToDS1302
011A 22 198 RET
199 ;//* **************************************************************
200 ;//* Function: get byte from ds1302 register
201 ;//* Input: A(command code)
202 ;//* Output: A(data byte)
203 ;//* Register: A,R7
011B 204 RDInfoFromDS1302:
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