Tutorial Microcontroller ISP

Tutorial Microcontroller 8051

Step 1st
Build the circuit as shown in figure 2.5.2. As you seen on figure 2.5.2. P3.0 trough P3.7 is connected to DB0 - DB7 ADC0804, and P2.0- P2.7. is connected to transistor driver, and P3.0 trough P3.7. is connected to 7 Segmen. Remember, that all we want to do with this lesson is write data ADC, to 8 x 7 Segmen.

Step 2nd
In this step, you must tipe the assembly program to make your LCD Character shown the data, we assume that you have already known the editor, we used MIDE-51o edit the program. ( Download File asm : exp253.zip, Download Complete Circuit File : ADC.pdf)

      org 0h
hundreds_100 equ 30h
tens_10      equ 31h
ones_1       equ 32h
dataadc      equ 33h  
start: call ADC
       call Bin2Dec
       call Display2SevenSegmen
       sjmp start
;
;=================================================
;this subroutine is used to take data from ADC and
;keep to Accumulator
;=================================================
ADC:   mov A,P0
       nop
       nop
       ret
;
;========================================================
;this subroutine is used to convert binary data from ADC
;become decimal 3 digit
;========================================================
Bin2Dec:
       mov b,#100d
       div ab
       mov hundreds_100,a
       mov a,b
       mov b,#10d
       div ab
       mov tens_10,a
       mov ones_1,b
       ret       
;===============================================
;this subroutine is used to convert data ADC to 
;8 x 7 segmen
;===============================================
Display2sevensegmen:
    mov P2,#11111111b    ; P1 = 11111111b
    mov DPTR,#hundreds   ; DPTR = [hundreds ]
    mov A,DataADC        ; A = [DataADC] 
    movc A,@A+DPTR       ; A = [A+DPTR]  
    mov DPTR,#Data7segmen; DPTR = [Data7Segmen]
    movc A,@A+DPTR       ; A = [A+DPTR]
    mov P0,A             ; P0 = A
    clr P2.1             ; P2.1 = 0, displaying hundreds 
    Acall delay        
;
    mov DPTR,#tens       ; DPTR = [ tens ]
    mov A,DataADC        ; A = [DataADC] 
    movc A,@A+DPTR       ; A = [A+DPTR]  
    mov DPTR,#Data7segmen; DPTR = [Data7Segmen]
    movc A,@A+DPTR       ; A = [A+DPTR]
    setb P2.1            ; P2.1 = 1
    mov P0,A             ; P0 = A
    clr P2.2             ; P2.2 = 0, displaying hundreds 
    Acall delay        
;
    mov DPTR,#ones       ; DPTR = [ ones] 
    mov A,DataADC        ; A = DataADC
    movc A,@A+DPTR       ; A =[ A+DPTR]  
    mov DPTR,#Data7segmen; DPTR = [Data7Segmen]
    movc A,@A+DPTR       ; A = [A+DPTR]
    setb P2.2            ; P2.2 = 1
    mov P0,A             ; P0 = A  
    clr P2.3             ; P2.3 = 0, displaying ones
    Acall delay
;
    setb P2.3
    mov P0,#11111011b
    clr P2.4             ; P2.4 = 0, displaying coma
    Acall delay
;
    mov DPTR,#fraction
    mov A,DataADC
    movc A,@A+DPTR
    mov DPTR,#Data7segmen
    movc A,@A+DPTR
    setb P2.4
    mov P0,A
    clr P2.5             ; P2.5 = 0, displaying fraction
    Acall delay
    ret
;
    setb P2.5
    mov P0,#10100011b
    clr P2.6             ; P2.6 = 0, displaying o
    Acall delay
;
    setb P2.6
    mov P0,#11000011b
    clr P2.7             ; P2.7 = 0, displaying C
    Acall delay
;
delay: mov R0,#0
delay1:mov R2,#0fh
       djnz R2,$
       djnz R0,delay1
       ret
;
fraction :
db 0,4,8,2,6,0,4,7,1,5,9,3,7,1,5,9,3,7,1,5,8,2,6,0,4
db 8,2,6,0,4,8,2,5,9,3,7,1,5,9,3,7,1,5,9,3,6,0,4,8,2,6
db 0,4,8,2,6,0,4,7,1,5,9,3,7,1,5,9,3,7,1,5,8,2,6,0
db 4,8,2,6,0,4,8,2,5,9,3,7,1,5,9,3,7,1,5,9,3,6,0,4,8,2
db 6,0,4,8,2,6,0,4,7,1,5,9,3,7,1,5,9,3,7,1,5,8,2,6
db 0,4,8,2,6,0,4,8,2,5,9,3,7,1,5,9,3,7,1,5,9,3,6,0,4,8
db 2,6,0,4,8,2,6,0,4,7,1,5,9,3,7,1,5,9,3,7,1,5,8,2
db 6,0,4,8,2,6,0,4,8,2,5,9,3,7,1,5,9,3,7,1,5,9,3,6,0,4
db 8,2,6,0,4,8,2,6,0,4,7,1,5,9,3,7,1,5,9,3,7,1,5,8,2,6
db 0,4,8,2,6,0,4,8,2,5,9,3,7,1,5,9,3,7,1,5,9,3,6,0,4,8,2,6,0
;
Ones :
db 0,0,0,1,1,2,2,2,3,3,3,4,4,5,5,5,6,6,7,7,7,8,8,9,9
db 9,0,0,1,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,8,8,9,9
db 0,0,0,1,1,2,2,2,3,3,3,4,4,5,5,5,6,6,7,7,7,8,8,9
db 9,9,0,0,1,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,8,8,9
db 9,0,0,0,1,1,2,2,2,3,3,3,4,4,5,5,5,6,6,7,7,7,8,8,9
db 9,9,0,0,1,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,8,8
db 9,9,0,0,0,1,1,2,2,2,3,3,3,4,4,5,5,5,6,6,7,7,7,8,8
db 9,9,9,0,0,1,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,8
db 8,9,9,0,0,0,1,1,2,2,2,3,3,3,4,4,5,5,5,6,6,7,7,7,8,8
db 9,9,9,0,0,1,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,8,8,9,9,0
;
Tens :
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
db 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2
db 2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3
db 3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
db 4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
db 5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6
db 6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
db 7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
db 8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,0
;
Hundreds :
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 
;
data7segmen:
db 11000000b,11111001b,10100100b,10110000b,10011001b
db 10010010b,10000010b,11111000b,10000000b,10010000b
end

Step 3rd
Safe your assembly program above, and name it with adc4.asm (for example) Compile the program that you have been save by using MIDE-51, see the software instruction.

Step 4th
Download your hex file ( adc4.hex ) into the microcontroller by using Microcontroller ATMEL ISP software, see the instruction.After download this hex file you'll see the action of ADC ( of course if your cable connection and your program are corrected )

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Lesson 1:
T o o l
1.1. Programmer
1.2. Edsim 51
1.3. MIDE-51
1.4. ATMEL ISP

Lesson 2:
Input Output
2.1.LED
2.2.Swicht
2.3.7 Segmen
2.4.LCD Character
2.5.ADC
2.6.DAC
2.7.Motor Stepper
2.8.Keypad

Lesson 3:
Timer Counter
3.1.Basic
3.2.Mode 0
3.3.Mode 1
3.4.Mode 2
3.5.Mode 3

Lesson 4:
Serial Comm.
4.1.Basic
4.2.LED
4.3.Rotate LED
4.2 ADC
4.3.LCD

Lesson 5:
Interuption
5.1.Basic
5.2.Timer
5.2.External