mleddisplay PAGE 1
1 ; Demonstration code for MCU 8051 IDE
2 ;
3 ; Load virtual HW from "mleddisplay.vhc"
4 ; and press F2 and F6
5 ;
6 ; It should increment 4 digit number displayed
7 ; on multiplexed LED display
8
9
10 ; -----------------------------------------------
11 ; CONSTANTS
12 ; -----------------------------------------------
13
0020 14 data_ptr data 20h ; Number to display
0004 15 data_len equ 4h ; Number of digits
16
17 ;; Codes for 8-segment LED display
18 ; They can be easily determinated with
19 ; 8-segment editor ( [Main menu] - >
20 ; [Utilities] -> [8-segment editor] )
0041 C0 21 numbers:db 11000000b ; 0
0042 F9 22 db 11111001b ; 1
0043 A4 23 db 10100100b ; 2
0044 B0 24 db 10110000b ; 3
0045 99 25 db 10011001b ; 4
0046 92 26 db 10010010b ; 5
0047 82 27 db 10000010b ; 6
0048 F8 28 db 11111000b ; 7
0049 80 29 db 10000000b ; 8
004A 90 30 db 10010000b ; 9
31
32 ; -----------------------------------------------
33 ; VECTORS
34 ; -----------------------------------------------
35 ; Reset vector
36 org 0
0000 020025 37 jmp start
38
39 ; -----------------------------------------------
40 ; SUBPROGRAMS
41 ; -----------------------------------------------
42
43 ;; Increment the number
44 ;
45 ; R0 must be set to data_ptr before call
46 ;
47 ; Affected registers: R0
48 ; Interrupts: None
49 ; Notes: Recursive sub-program
50 inrement_number:
0003 06 51 inc @R0
0004 B60A09 52 cjne @R0, #0Ah, inc_num_end
53
0007 7600 54 mov @R0, #0
0009 08 55 inc R0
000A B82401 56 cjne R0, #data_ptr+data_len, $+4
000D 22 57 ret
000E 1103 58 call inrement_number
59 inc_num_end:
0010 22 60 ret
61
62 ;; Display the number on the LED display
63 ;
64 ; DPTR must point to table numbers
65 ; R0 must contain (data_ptr+data_len)
66 ;
67 ; Affected registers: A, B, R0, P1, P3
68 ; Interrupts: None
69 ; Notes: Uses DPTR
70 display_number:
71 ; Select digit to display
0011 18 72 dec R0 ; In uC
0012 E5F0 73 mov A, B
0014 03 74 rr A
0015 F5F0 75 mov B, A
76
77 ; Translate the digit to binary
78 ; representation for the LED display
0017 E6 79 mov A, @R0
0018 93 80 movc A, @A+DPTR
81
82 ; Display the digit on the display
0019 75B0FF 83 mov P3, #0ffh
001C F590 84 mov P1, A
001E 85F0B0 85 mov P3, B
86
87 ; Display next digit
0021 B820ED 88 cjne R0, #data_ptr, display_number
0024 22 89 ret
90
91 ; -----------------------------------------------
92 ; PROGRAM START
93 ; -----------------------------------------------
94 start:
95 ; Data to zeroes
0025 752000 96 mov data_ptr+0, #0h ; left-most
0028 752100 97 mov data_ptr+1, #0h
002B 752200 98 mov data_ptr+2, #0h
002E 752300 99 mov data_ptr+3, #0h ; right-most
100
101 ; Address 1st number on the display
0031 75F0EE 102 mov B, #0EEh
103 ; Initialize DPTR (Data PoinTeR)
0034 900041 104 mov DPTR, #numbers
105
106 ; -----------------------------------------------
107 ; MAIN LOOP
108 ; -----------------------------------------------
109
110 main:
111 ; Show the number on the LED display
0037 7824 112 mov R0, #data_ptr+data_len
0039 1111 113 call display_number
114
115 ; Increment the number
003B 7820 116 mov R0, #data_ptr
003D 1103 117 call inrement_number
118
119 ; Close main loop
003F 80F6 120 jmp main
121
122 ; -----------------------------------------------
123 ; PROGRAM END
124 ; -----------------------------------------------
125 end
ASSEMBLY COMPLETE, NO ERRORS FOUND, NO WARNINGS
SYMBOL TABLE:
??MCU_8051_IDE . . . . . . . . . . . N NUMB 8051H NOT USED
??VERSION. . . . . . . . . . . . . . N NUMB 0147H NOT USED
AC . . . . . . . . . . . . . . . . . B ADDR 00D6H NOT USED
ACC. . . . . . . . . . . . . . . . . D ADDR 00E0H NOT USED
ACSR . . . . . . . . . . . . . . . . D ADDR 0097H NOT USED
ADCF . . . . . . . . . . . . . . . . D ADDR 00F6H NOT USED
ADCLK. . . . . . . . . . . . . . . . D ADDR 00F2H NOT USED
ADCON. . . . . . . . . . . . . . . . D ADDR 00F3H NOT USED
ADDH . . . . . . . . . . . . . . . . D ADDR 00F5H NOT USED
ADDL . . . . . . . . . . . . . . . . D ADDR 00F4H NOT USED
AUXR . . . . . . . . . . . . . . . . D ADDR 008EH NOT USED
AUXR1. . . . . . . . . . . . . . . . D ADDR 00A2H NOT USED
B. . . . . . . . . . . . . . . . . . D ADDR 00F0H
BDRCON . . . . . . . . . . . . . . . D ADDR 009BH NOT USED
BDRCON_1 . . . . . . . . . . . . . . D ADDR 009CH NOT USED
BRL. . . . . . . . . . . . . . . . . D ADDR 009AH NOT USED
CCAP0H . . . . . . . . . . . . . . . D ADDR 00FAH NOT USED
CCAP0L . . . . . . . . . . . . . . . D ADDR 00EAH NOT USED
CCAP1H . . . . . . . . . . . . . . . D ADDR 00FBH NOT USED
CCAP1L . . . . . . . . . . . . . . . D ADDR 00EBH NOT USED
CCAP2H . . . . . . . . . . . . . . . D ADDR 00FCH NOT USED
CCAP3H . . . . . . . . . . . . . . . D ADDR 00FDH NOT USED
CCAP4H . . . . . . . . . . . . . . . D ADDR 00FEH NOT USED
CCAPL2H. . . . . . . . . . . . . . . D ADDR 00FCH NOT USED
CCAPL2L. . . . . . . . . . . . . . . D ADDR 00ECH NOT USED
CCAPL3H. . . . . . . . . . . . . . . D ADDR 00FDH NOT USED
CCAPL3L. . . . . . . . . . . . . . . D ADDR 00EDH NOT USED
CCAPL4H. . . . . . . . . . . . . . . D ADDR 00FEH NOT USED
CCAPL4L. . . . . . . . . . . . . . . D ADDR 00EEH NOT USED
CCAPM0 . . . . . . . . . . . . . . . D ADDR 00DAH NOT USED
CCAPM1 . . . . . . . . . . . . . . . D ADDR 00DBH NOT USED
CCAPM2 . . . . . . . . . . . . . . . D ADDR 00DCH NOT USED
CCAPM3 . . . . . . . . . . . . . . . D ADDR 00DDH NOT USED
CCAPM4 . . . . . . . . . . . . . . . D ADDR 00DEH NOT USED
CCF0 . . . . . . . . . . . . . . . . B ADDR 00D8H NOT USED
CCF1 . . . . . . . . . . . . . . . . B ADDR 00D9H NOT USED
CCF2 . . . . . . . . . . . . . . . . B ADDR 00DAH NOT USED
CCF3 . . . . . . . . . . . . . . . . B ADDR 00DBH NOT USED
CCF4 . . . . . . . . . . . . . . . . B ADDR 00DCH NOT USED
CCON . . . . . . . . . . . . . . . . D ADDR 00D8H NOT USED
CFINT. . . . . . . . . . . . . . . . C ADDR 0033H NOT USED
CH . . . . . . . . . . . . . . . . . D ADDR 00F9H NOT USED
CKCON. . . . . . . . . . . . . . . . D ADDR 008FH NOT USED
CKCON0 . . . . . . . . . . . . . . . D ADDR 008FH NOT USED
CKRL . . . . . . . . . . . . . . . . D ADDR 0097H NOT USED
CKSEL. . . . . . . . . . . . . . . . D ADDR 0085H NOT USED
CL . . . . . . . . . . . . . . . . . D ADDR 00E9H NOT USED
CLKREG . . . . . . . . . . . . . . . D ADDR 008FH NOT USED
CMOD . . . . . . . . . . . . . . . . D ADDR 00D9H NOT USED
CPRL2. . . . . . . . . . . . . . . . B ADDR 00C8H NOT USED
CR . . . . . . . . . . . . . . . . . B ADDR 00DEH NOT USED
CT2. . . . . . . . . . . . . . . . . B ADDR 00C9H NOT USED
CY . . . . . . . . . . . . . . . . . B ADDR 00D7H NOT USED
DATA_LEN . . . . . . . . . . . . . . N NUMB 0004H
DATA_PTR . . . . . . . . . . . . . . D ADDR 0020H
DISPLAY_NUMBER . . . . . . . . . . . C ADDR 0011H
DP0H . . . . . . . . . . . . . . . . D ADDR 0083H NOT USED
DP0L . . . . . . . . . . . . . . . . D ADDR 0082H NOT USED
DP1H . . . . . . . . . . . . . . . . D ADDR 0085H NOT USED
DP1L . . . . . . . . . . . . . . . . D ADDR 0084H NOT USED
DPH. . . . . . . . . . . . . . . . . D ADDR 0083H NOT USED
DPL. . . . . . . . . . . . . . . . . D ADDR 0082H NOT USED
EA . . . . . . . . . . . . . . . . . B ADDR 00AFH NOT USED
EC . . . . . . . . . . . . . . . . . B ADDR 00AEH NOT USED
EECON. . . . . . . . . . . . . . . . D ADDR 0096H NOT USED
ES . . . . . . . . . . . . . . . . . B ADDR 00ACH NOT USED
ET0. . . . . . . . . . . . . . . . . B ADDR 00A9H NOT USED
ET1. . . . . . . . . . . . . . . . . B ADDR 00ABH NOT USED
ET2. . . . . . . . . . . . . . . . . B ADDR 00ADH NOT USED
EX0. . . . . . . . . . . . . . . . . B ADDR 00A8H NOT USED
EX1. . . . . . . . . . . . . . . . . B ADDR 00AAH NOT USED
EXEN2. . . . . . . . . . . . . . . . B ADDR 00CBH NOT USED
EXF2 . . . . . . . . . . . . . . . . B ADDR 00CEH NOT USED
EXTI0. . . . . . . . . . . . . . . . C ADDR 0003H NOT USED
EXTI1. . . . . . . . . . . . . . . . C ADDR 0013H NOT USED
F0 . . . . . . . . . . . . . . . . . B ADDR 00D5H NOT USED
FE . . . . . . . . . . . . . . . . . B ADDR 009FH NOT USED
IE . . . . . . . . . . . . . . . . . D ADDR 00A8H NOT USED
IE0. . . . . . . . . . . . . . . . . B ADDR 0089H NOT USED
IE1. . . . . . . . . . . . . . . . . B ADDR 008BH NOT USED
INC_NUM_END. . . . . . . . . . . . . C ADDR 0010H
INREMENT_NUMBER. . . . . . . . . . . C ADDR 0003H
INT0 . . . . . . . . . . . . . . . . B ADDR 00B2H NOT USED
INT1 . . . . . . . . . . . . . . . . B ADDR 00B3H NOT USED
IP . . . . . . . . . . . . . . . . . D ADDR 00B8H NOT USED
IPH. . . . . . . . . . . . . . . . . D ADDR 00B7H NOT USED
IPH0 . . . . . . . . . . . . . . . . D ADDR 00B7H NOT USED
IPH1 . . . . . . . . . . . . . . . . D ADDR 00B3H NOT USED
IPL0 . . . . . . . . . . . . . . . . D ADDR 00B8H NOT USED
IPL1 . . . . . . . . . . . . . . . . D ADDR 00B2H NOT USED
IT0. . . . . . . . . . . . . . . . . B ADDR 0088H NOT USED
IT1. . . . . . . . . . . . . . . . . B ADDR 008AH NOT USED
KBE. . . . . . . . . . . . . . . . . D ADDR 009DH NOT USED
KBF. . . . . . . . . . . . . . . . . D ADDR 009EH NOT USED
KBLS . . . . . . . . . . . . . . . . D ADDR 009CH NOT USED
MAIN . . . . . . . . . . . . . . . . C ADDR 0037H
NUMBERS. . . . . . . . . . . . . . . C ADDR 0041H
OSCCON . . . . . . . . . . . . . . . D ADDR 0086H NOT USED
OV . . . . . . . . . . . . . . . . . B ADDR 00D2H NOT USED
P. . . . . . . . . . . . . . . . . . B ADDR 00D0H NOT USED
P0 . . . . . . . . . . . . . . . . . D ADDR 0080H NOT USED
P1 . . . . . . . . . . . . . . . . . D ADDR 0090H
P1M1 . . . . . . . . . . . . . . . . D ADDR 00D4H NOT USED
P1M2 . . . . . . . . . . . . . . . . D ADDR 00E2H NOT USED
P2 . . . . . . . . . . . . . . . . . D ADDR 00A0H NOT USED
P3 . . . . . . . . . . . . . . . . . D ADDR 00B0H
P3M1 . . . . . . . . . . . . . . . . D ADDR 00D5H NOT USED
P3M2 . . . . . . . . . . . . . . . . D ADDR 00E3H NOT USED
P4 . . . . . . . . . . . . . . . . . D ADDR 00C0H NOT USED
P4M1 . . . . . . . . . . . . . . . . D ADDR 00D6H NOT USED
P4M2 . . . . . . . . . . . . . . . . D ADDR 00E4H NOT USED
P5 . . . . . . . . . . . . . . . . . D ADDR 00E8H NOT USED
PC . . . . . . . . . . . . . . . . . B ADDR 00BEH NOT USED
PCON . . . . . . . . . . . . . . . . D ADDR 0087H NOT USED
PPCL . . . . . . . . . . . . . . . . B ADDR 00BEH NOT USED
PS . . . . . . . . . . . . . . . . . B ADDR 00BCH NOT USED
PSL. . . . . . . . . . . . . . . . . B ADDR 00BCH NOT USED
PSW. . . . . . . . . . . . . . . . . D ADDR 00D0H NOT USED
PT0. . . . . . . . . . . . . . . . . B ADDR 00B9H NOT USED
PT0L . . . . . . . . . . . . . . . . B ADDR 00B9H NOT USED
PT1. . . . . . . . . . . . . . . . . B ADDR 00BBH NOT USED
PT1L . . . . . . . . . . . . . . . . B ADDR 00BBH NOT USED
PT2. . . . . . . . . . . . . . . . . B ADDR 00BDH NOT USED
PT2L . . . . . . . . . . . . . . . . B ADDR 00BDH NOT USED
PX0. . . . . . . . . . . . . . . . . B ADDR 00B8H NOT USED
PX0L . . . . . . . . . . . . . . . . B ADDR 00B8H NOT USED
PX1. . . . . . . . . . . . . . . . . B ADDR 00BAH NOT USED
PX1L . . . . . . . . . . . . . . . . B ADDR 00BAH NOT USED
RB8. . . . . . . . . . . . . . . . . B ADDR 009AH NOT USED
RCAP2H . . . . . . . . . . . . . . . D ADDR 00CBH NOT USED
RCAP2L . . . . . . . . . . . . . . . D ADDR 00CAH NOT USED
RCLK . . . . . . . . . . . . . . . . B ADDR 00CDH NOT USED
RD . . . . . . . . . . . . . . . . . B ADDR 00B7H NOT USED
REN. . . . . . . . . . . . . . . . . B ADDR 009CH NOT USED
RESET. . . . . . . . . . . . . . . . C ADDR 0000H NOT USED
RI . . . . . . . . . . . . . . . . . B ADDR 0098H NOT USED
RS0. . . . . . . . . . . . . . . . . B ADDR 00D3H NOT USED
RS1. . . . . . . . . . . . . . . . . B ADDR 00D4H NOT USED
RXD. . . . . . . . . . . . . . . . . B ADDR 00B0H NOT USED
SADDR. . . . . . . . . . . . . . . . D ADDR 00A9H NOT USED
SADDR_0. . . . . . . . . . . . . . . D ADDR 00A9H NOT USED
SADDR_1. . . . . . . . . . . . . . . D ADDR 00AAH NOT USED
SADEN. . . . . . . . . . . . . . . . D ADDR 00B9H NOT USED
SADEN_0. . . . . . . . . . . . . . . D ADDR 00B9H NOT USED
SADEN_1. . . . . . . . . . . . . . . D ADDR 00BAH NOT USED
SBUF . . . . . . . . . . . . . . . . D ADDR 0099H NOT USED
SCON . . . . . . . . . . . . . . . . D ADDR 0098H NOT USED
SINT . . . . . . . . . . . . . . . . C ADDR 0023H NOT USED
SM0. . . . . . . . . . . . . . . . . B ADDR 009FH NOT USED
SM1. . . . . . . . . . . . . . . . . B ADDR 009EH NOT USED
SM2. . . . . . . . . . . . . . . . . B ADDR 009DH NOT USED
SP . . . . . . . . . . . . . . . . . D ADDR 0081H NOT USED
SPCON. . . . . . . . . . . . . . . . D ADDR 00C3H NOT USED
SPCR . . . . . . . . . . . . . . . . D ADDR 00D5H NOT USED
SPDAT. . . . . . . . . . . . . . . . D ADDR 00C5H NOT USED
SPDR . . . . . . . . . . . . . . . . D ADDR 0086H NOT USED
SPSR . . . . . . . . . . . . . . . . D ADDR 00AAH NOT USED
SPSTA. . . . . . . . . . . . . . . . D ADDR 00C4H NOT USED
START. . . . . . . . . . . . . . . . C ADDR 0025H
T0 . . . . . . . . . . . . . . . . . B ADDR 00B4H NOT USED
T1 . . . . . . . . . . . . . . . . . B ADDR 00B5H NOT USED
T2CON. . . . . . . . . . . . . . . . D ADDR 00C8H NOT USED
T2MOD. . . . . . . . . . . . . . . . D ADDR 00C9H NOT USED
TB8. . . . . . . . . . . . . . . . . B ADDR 009BH NOT USED
TCLK . . . . . . . . . . . . . . . . B ADDR 00CCH NOT USED
TCON . . . . . . . . . . . . . . . . D ADDR 0088H NOT USED
TF0. . . . . . . . . . . . . . . . . B ADDR 008DH NOT USED
TF1. . . . . . . . . . . . . . . . . B ADDR 008FH NOT USED
TF2. . . . . . . . . . . . . . . . . B ADDR 00CFH NOT USED
TH0. . . . . . . . . . . . . . . . . D ADDR 008CH NOT USED
TH1. . . . . . . . . . . . . . . . . D ADDR 008DH NOT USED
TH2. . . . . . . . . . . . . . . . . D ADDR 00CDH NOT USED
TI . . . . . . . . . . . . . . . . . B ADDR 0099H NOT USED
TIMER0 . . . . . . . . . . . . . . . C ADDR 000BH NOT USED
TIMER1 . . . . . . . . . . . . . . . C ADDR 001BH NOT USED
TIMER2 . . . . . . . . . . . . . . . C ADDR 002BH NOT USED
TL0. . . . . . . . . . . . . . . . . D ADDR 008AH NOT USED
TL1. . . . . . . . . . . . . . . . . D ADDR 008BH NOT USED
TL2. . . . . . . . . . . . . . . . . D ADDR 00CCH NOT USED
TMOD . . . . . . . . . . . . . . . . D ADDR 0089H NOT USED
TR0. . . . . . . . . . . . . . . . . B ADDR 008CH NOT USED
TR1. . . . . . . . . . . . . . . . . B ADDR 008EH NOT USED
TR2. . . . . . . . . . . . . . . . . B ADDR 00CAH NOT USED
TXD. . . . . . . . . . . . . . . . . B ADDR 00B1H NOT USED
WDTCON . . . . . . . . . . . . . . . D ADDR 00A7H NOT USED
WDTPRG . . . . . . . . . . . . . . . D ADDR 00A7H NOT USED
WDTRST . . . . . . . . . . . . . . . D ADDR 00A6H NOT USED
WR . . . . . . . . . . . . . . . . . B ADDR 00B6H NOT USED
