📄 adc.lst
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A51 MACRO ASSEMBLER ADC 07/05/2010 14:31:52 PAGE 1
MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN ADC.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE ADC.asm SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
1 ;/*------------------------------------------------------------------*/
2 ;/* --- STC MCU International Limited -------------------------------*/
3 ;/* --- STC 1T Series MCU A/D Conversion Demo -----------------------*/
4 ;/* --- Mobile: (86)13922805190 -------------- ----------------------*/
5 ;/* --- Fax: 86-755-82944243 ----------------------------------------*/
6 ;/* --- Tel: 86-755-82948412 ----------------------------------------*/
7 ;/* --- Web: www.STCMCU.com -----------------------------------------*/
8 ;/* If you want to use the program or the program referenced in the */
9 ;/* article, please specify in which data and procedures from STC */
10 ;/*------------------------------------------------------------------*/
11
12 ;/*Declare SFR associated with the ADC */
00BC 13 ADC_CONTR EQU 0BCH ;ADC control register
00BD 14 ADC_RES EQU 0BDH ;ADC high 8-bit result register
00BE 15 ADC_LOW2 EQU 0BEH ;ADC low 2-bit result register
009D 16 P1ASF EQU 09DH ;P1 secondary function control register
17
18 ;/*Define ADC operation const for ADC_CONTR*/
0080 19 ADC_POWER EQU 80H ;ADC power control bit
0010 20 ADC_FLAG EQU 10H ;ADC complete flag
0008 21 ADC_START EQU 08H ;ADC start control bit
0000 22 ADC_SPEEDLL EQU 00H ;420 clocks
0020 23 ADC_SPEEDL EQU 20H ;280 clocks
0040 24 ADC_SPEEDH EQU 40H ;140 clocks
0060 25 ADC_SPEEDHH EQU 60H ;70 clocks
26
27 ;-----------------------------------------
0000 28 ORG 0000H
0000 020100 29 LJMP MAIN
30 ;-----------------------------------------
0100 31 ORG 0100H
0100 32 MAIN:
0100 12015C 33 LCALL INIT_UART ;Init UART, use to show ADC result
0103 12014D 34 LCALL INIT_ADC ;Init ADC sfr
35 ;-------------------------------
0106 36 NEXT:
0106 7400 37 MOV A,#0
0108 120130 38 LCALL SHOW_RESULT ;Show channel0 result
010B 7401 39 MOV A,#1
010D 120130 40 LCALL SHOW_RESULT ;Show channel1 result
0110 7402 41 MOV A,#2
0112 120130 42 LCALL SHOW_RESULT ;Show channel2 result
0115 7403 43 MOV A,#3
0117 120130 44 LCALL SHOW_RESULT ;Show channel3 result
011A 7404 45 MOV A,#4
011C 120130 46 LCALL SHOW_RESULT ;Show channel4 result
011F 7405 47 MOV A,#5
0121 120130 48 LCALL SHOW_RESULT ;Show channel5 result
0124 7406 49 MOV A,#6
0126 120130 50 LCALL SHOW_RESULT ;Show channel6 result
0129 7407 51 MOV A,#7
012B 120130 52 LCALL SHOW_RESULT ;Show channel7 result
53
012E 80D6 54 SJMP NEXT
55
56 ;/*----------------------------
57 ;Send ADC result to UART
58 ;Input: ACC (ADC channel NO.)
A51 MACRO ASSEMBLER ADC 07/05/2010 14:31:52 PAGE 2
59 ;Output:-
60 ;----------------------------*/
0130 61 SHOW_RESULT:
0130 12016B 62 LCALL SEND_DATA ;Show Channel NO.
0133 12013A 63 LCALL GET_ADC_RESULT ;Get high 8-bit ADC result
0136 12016B 64 LCALL SEND_DATA ;Show result
65
66 ;//if you want show 10-bit result, uncomment next 2 lines
67 ; MOV A,ADC_LOW2 ;Get low 2-bit ADC result
68 ; LCALL SEND_DATA ;Show result
0139 22 69 RET
70
71
72 ;/*----------------------------
73 ;Read ADC conversion result
74 ;Input: ACC (ADC channel NO.)
75 ;Output:ACC (ADC result)
76 ;----------------------------*/
013A 77 GET_ADC_RESULT:
013A 4488 78 ORL A,#ADC_POWER | ADC_SPEEDLL | ADC_START
013C F5BC 79 MOV ADC_CONTR,A ;Start A/D conversion
013E 00 80 NOP ;Must wait before inquiry
013F 00 81 NOP
0140 00 82 NOP
0141 00 83 NOP
0142 84 WAIT:
0142 E5BC 85 MOV A,ADC_CONTR ;Wait complete flag
0144 30E4FB 86 JNB ACC.4,WAIT ;ADC_FLAG(ADC_CONTR.4)
0147 53BCEF 87 ANL ADC_CONTR,#NOT ADC_FLAG ;Clear ADC_FLAG
014A E5BD 88 MOV A,ADC_RES ;Return ADC result
014C 22 89 RET
90
91 ;/*----------------------------
92 ;Initial ADC sfr
93 ;----------------------------*/
014D 94 INIT_ADC:
014D 759DFF 95 MOV P1ASF,#0FFH ;Open 8 channels ADC function
0150 75BD00 96 MOV ADC_RES,#0 ;Clear previous result
0153 75BC80 97 MOV ADC_CONTR,#ADC_POWER | ADC_SPEEDLL
0156 7402 98 MOV A,#2 ;ADC power-on and delay
0158 120173 99 LCALL DELAY
015B 22 100 RET
101
102 ;/*----------------------------
103 ;Initial UART
104 ;----------------------------*/
015C 105 INIT_UART:
015C 75985A 106 MOV SCON,#5AH ;8 bit data ,no parity bit
015F 758920 107 MOV TMOD,#20H ;T1 as 8-bit auto reload
0162 74FB 108 MOV A,#-5 ;Set Uart baudrate -(18432000/12/32/9600)
0164 F58D 109 MOV TH1,A ;Set T1 reload value
0166 F58B 110 MOV TL1,A
0168 D28E 111 SETB TR1 ;T1 start running
016A 22 112 RET
113
114 ;/*----------------------------
115 ;Send one byte data to PC
116 ;Input: ACC (UART data)
117 ;Output:-
118 ;----------------------------*/
016B 119 SEND_DATA:
016B 3099FD 120 JNB TI,$ ;Wait for the previous data is sent
016E C299 121 CLR TI ;Clear TI flag
0170 F599 122 MOV SBUF,A ;Send current data
0172 22 123 RET
124
A51 MACRO ASSEMBLER ADC 07/05/2010 14:31:52 PAGE 3
125 ;/*----------------------------
126 ;Software delay function
127 ;----------------------------*/
0173 128 DELAY:
0173 FA 129 MOV R2,A
0174 E4 130 CLR A
0175 F8 131 MOV R0,A
0176 F9 132 MOV R1,A
0177 133 DELAY1:
0177 D8FE 134 DJNZ R0,DELAY1
0179 D9FC 135 DJNZ R1,DELAY1
017B DAFA 136 DJNZ R2,DELAY1
017D 22 137 RET
138
139 END
A51 MACRO ASSEMBLER ADC 07/05/2010 14:31:52 PAGE 4
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
ACC. . . . . . . . D ADDR 00E0H A
ADC_CONTR. . . . . N NUMB 00BCH A
ADC_FLAG . . . . . N NUMB 0010H A
ADC_LOW2 . . . . . N NUMB 00BEH A
ADC_POWER. . . . . N NUMB 0080H A
ADC_RES. . . . . . N NUMB 00BDH A
ADC_SPEEDH . . . . N NUMB 0040H A
ADC_SPEEDHH. . . . N NUMB 0060H A
ADC_SPEEDL . . . . N NUMB 0020H A
ADC_SPEEDLL. . . . N NUMB 0000H A
ADC_START. . . . . N NUMB 0008H A
DELAY. . . . . . . C ADDR 0173H A
DELAY1 . . . . . . C ADDR 0177H A
GET_ADC_RESULT . . C ADDR 013AH A
INIT_ADC . . . . . C ADDR 014DH A
INIT_UART. . . . . C ADDR 015CH A
MAIN . . . . . . . C ADDR 0100H A
NEXT . . . . . . . C ADDR 0106H A
P1ASF. . . . . . . N NUMB 009DH A
SBUF . . . . . . . D ADDR 0099H A
SCON . . . . . . . D ADDR 0098H A
SEND_DATA. . . . . C ADDR 016BH A
SHOW_RESULT. . . . C ADDR 0130H A
TH1. . . . . . . . D ADDR 008DH A
TI . . . . . . . . B ADDR 0098H.1 A
TL1. . . . . . . . D ADDR 008BH A
TMOD . . . . . . . D ADDR 0089H A
TR1. . . . . . . . B ADDR 0088H.6 A
WAIT . . . . . . . C ADDR 0142H A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
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