Notes

ORG 0
MOV R0, 0H
MOV R0, #7FH

ZERO:
MOV @R0, #0H
DJNZ R0, ZERO

acall CONFIGURE_LCD
MOV DPTR,#200H
KEYBOARD_LOOP:

ACALL GET_INPUT ;Get input from user and put into specific RAM location
;ACALL CONTROL ;Using the operator, determine which operation will be applied
sjmp KEYBOARD_LOOP


GET_INPUT:
CALL KEYBOARD
PUSH ACC ;Save the first input, we will clear screen now
ACALL SET_SCREEN ;Prepare screen
POP ACC ;Get all input, print and save into specific registers
ACALL SEND_DATA
ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD

ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD


ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD

ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD

ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD

ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD

ANL A, #0FH
MOVX @DPTR, A
INC DPTR
ACALL KEYBOARD


mov a, #0C0H ;After all input is done, move to next line
acall SEND_COMMAND
RET

SET_SCREEN:
mov a, #01H ;Clear Screen
acall SEND_COMMAND
mov a, #80H ;Move to first line
acall SEND_COMMAND
RET



; ERR_MSG: RET
;----------------------------------------------------------------------------------------------------
;----------------------------------------------------------------------------------------------------
;Program to sort an array of number using the Bubble Sort algorithm in ascending order.
;----------------------------------------------------------------------------------------------------
;Input Location: 9000h
;Output Location: 9000h itself
;Number of elementS: 010h
;In the bubble sort algorithm, adjacent elements are compared and sorted with respect to each other.
;This process is done repeatedly starting from the first element everytime till the array is sorted.
;Here's an example. The numbers in the array currently being compared are enclosed in quotes:
;Given array: (5,1,8,2)
;First Pass:
; ("5,3",8,2) -> ("3,5",8,2) -Swap 5 and 3 since 5 is greater.
; (3,"5,8",2) -> (3,"5,8",2) -5 and 8 are in order so don't swap them. Move on.
; (3,5,"8,2") -> (3,5,"2,8") -8 is greater - swap it's position with 2.
;Second Pass:
; ("3,5",2,8) -> ("3,5",2,8) -3 and 5 are in order. Do nothing and move on.
; (3,"5,2",8) -> (3,"2,5",8) -5 is greater swap 2's and 5's positions.
;Third Pass:
; ("2,3",5,8) -> ("2,3",5,8) -3 is greater so swap.
;This sorts the array as (2,3,5,8) which is in ascending order. Notice that the number of passes is
;one less than the number of elements in the array and number of iterations in each pass is the
;total number of elements minus the current pass number.
;----------------------------------------------------------------------------------------------------
;----------------------------------------------------------------------------------------------------
MOV DPTR,#200H

MOV R7, #07h
;-----------------------------------Data Required for the Program------------------------------------
MOV R0, #06h ;Counter for LOOP1
;----------------------------Sort in Ascending Order Using Bubble Sort-------------------------------
LOOP1: ;Outer Loop - Handles number of passes

;MOV DPTR, #300h ;Point to beginning of array
MOV A, R0 ;Initialize R1 - the counter for LOOP2
MOV R1, A ;to the value of R0 - the number of iterations in each pass is same
;as the number of elements minus serial number of the current pass.

LOOP2: ;Inner Loop - Handles each pass.

MOVC A, @A+DPTR ;Copy a number of the array to the accumulator
MOV R2, A ;and store it in R2.
INC DPTR ;Move to the net number
MOVC A, @A+DPTR ;and store that in the accumulator.

SUBB A, R2 ;Subtract the first from the second.

JNC Continue2 ;If no carry is generated the second is greater and the numbers are
;in order with respect to each other. Otherwise they must be swapped.
SwapNumbers:
MOVC A, @A+DPTR ;Move the second number to the accumulator.
XCH A, R2 ;Exchange contents of the accumulator and R2. This makes A contain
;the first number and R2 the second.
MOVX @DPTR, A ;Store the first number at the place where the second one was stored.
DEC DPL ;Move to the previous memory location.
MOV A, R2 ;Copy the second number to the accumulator
MOVX @DPTR, A ;and store it in the first number's place.

Continue2: DJNZ R1, LOOP2 ;Move on to the next iteration of the current pass.

Continue1: DJNZ R0, LOOP1 ;Move on to the next pass.

;Here: SJMP Here ;End of program - Loop here indefinitely.

MOV A, R7
MOV B ,#02H
DIV AB
MOV R6,B
CJNE R6,#0h,ODDMEDIAN
;LJMP EVENMEDIAN

;----------------------------------------------------------------------------------------------------
;----------------------------------------------------------------------------------------------------
ODDMEDIAN: MOV A, R7
ADD A, #01H
MOV B ,#02H
DIV AB
SUBB A,#01H
MOV DPTR, #200h
BACK: INC DPTR
DJNZ ACC, BACK
MOVC A, @A+DPTR
MOV B ,#02H
DIV AB
ADD A, #30H
ACALL SEND_DATA

;EVENMEDIAN:MOV A,R7
; MOV B ,#02H
; DIV AB
; SUBB A,#01H
; MOV DPTR, #200h
; BACK2: INC DPTR
; DJNZ ACC, BACK2
; MOVC A, @A+DPTR
; MOV R5,A
; INC DPTR
; MOVC A, @A+DPTR
; ADD A,R5
; MOV B ,#02H
; DIV AB
;
; ADD A, #30H
; ACALL SEND_DATA
;
;
;SAMPLEMEAN:MOV DPTR, #200h
; MOV R4, #00h
; MOV A,R7
;loop: MOVC A, @A+DPTR ; Coping value from memory location at which R0 is pointing
; ADD A,R4
; MOV R4,A ; Sum is stored in R4 register
; INC DPTR
; DJNZ R7, loop
; MOV B,#06h ; Moving number of elements to register B
; MOV A,R4 ; Moving Sum all elements to register A
; DIV AB ; Finding average
; MOV R3,A
;
;MEANDEVIATION:MOV DPTR, #200h
; MOV R4, #00h
; MOV A,R7
;loop3: MOVC A, @A+DPTR ; Coping value from memory location at which R0 is pointing
; SUBB A,R3
; MOV R4,A ; Sum is stored in R4 register
; INC DPTR
; DJNZ R7, loop3
; MOV B,#06h ; Moving number of elements to register B
; MOV A,R4 ; Moving Sum all elements to register A
; DIV AB ; Finding average
; MOV R3,A
;






;KEYBOARD_LOOP:
; acall KEYBOARD
; ;now, A has the key pressed
; acall SEND_DATA
; sjmp KEYBOARD_LOOP




CONFIGURE_LCD: ;THIS SUBROUTINE SENDS THE INITIALIZATION COMMANDS TO THE LCD
mov a,#38H ;TWO LINES, 5X7 MATRIX
acall SEND_COMMAND
mov a,#0FH ;DISPLAY ON, CURSOR BLINKING
acall SEND_COMMAND
mov a,#06H ;INCREMENT CURSOR (SHIFT CURSOR TO RIGHT)
acall SEND_COMMAND
mov a,#01H ;CLEAR DISPLAY SCREEN
acall SEND_COMMAND
mov a,#80H ;FORCE CURSOR TO BEGINNING OF THE FIRST LINE
acall SEND_COMMAND
ret



SEND_COMMAND:
mov p1,a ;THE COMMAND IS STORED IN A, SEND IT TO LCD
clr p3.5 ;RS=0 BEFORE SENDING COMMAND
clr p3.6 ;R/W=0 TO WRITE
setb p3.7 ;SEND A HIGH TO LOW SIGNAL TO ENABLE PIN
acall DELAY
clr p3.7
ret


SEND_DATA:
mov p1,a ;SEND THE DATA STORED IN A TO LCD
setb p3.5 ;RS=1 BEFORE SENDING DATA
clr p3.6 ;R/W=0 TO WRITE
setb p3.7 ;SEND A HIGH TO LOW SIGNAL TO ENABLE PIN
acall DELAY
clr p3.7
ret


DELAY:
push 0
push 1
mov r0,#50
DELAY_OUTER_LOOP:
mov r1,#255
djnz r1,$
djnz r0,DELAY_OUTER_LOOP
pop 1
pop 0
ret


KEYBOARD: ;takes the key pressed from the keyboard and puts it to A
mov P0, #0ffh ;makes P0 input
K1:
mov P2, #0 ;ground all rows
mov A, P0
anl A, #00001111B
cjne A, #00001111B, K1
K2:
acall DELAY
mov A, P0
anl A, #00001111B
cjne A, #00001111B, KB_OVER
sjmp K2
KB_OVER:
acall DELAY
mov A, P0
anl A, #00001111B
cjne A, #00001111B, KB_OVER1
sjmp K2
KB_OVER1:
mov P2, #11111110B
mov A, P0
anl A, #00001111B
cjne A, #00001111B, ROW_0
mov P2, #11111101B
mov A, P0
anl A, #00001111B
cjne A, #00001111B, ROW_1
mov P2, #11111011B
mov A, P0
anl A, #00001111B
cjne A, #00001111B, ROW_2
mov P2, #11110111B
mov A, P0
anl A, #00001111B
cjne A, #00001111B, ROW_3
ljmp K2

ROW_0:
mov DPTR, #KCODE0
sjmp KB_FIND
ROW_1:
mov DPTR, #KCODE1
sjmp KB_FIND
ROW_2:
mov DPTR, #KCODE2
sjmp KB_FIND
ROW_3:
mov DPTR, #KCODE3
KB_FIND:
rrc A
jnc KB_MATCH
inc DPTR
sjmp KB_FIND
KB_MATCH:
clr A
movc A, @A+DPTR; get ASCII code from the table
ret

;ASCII look-up table
KCODE0: DB '1', '2', '3', 'A'
KCODE1: DB '4', '5', '6', 'B'
KCODE2: DB '7', '8', '9', 'C'
KCODE3: DB '*', '0', '#', 'D'

;ORG 300h
;ARRAYLIST:
;DB 12 , 69 , 35 ,78 ,88 ,5 ,100 ,34 , 56 , 32 , 61 , 22 ,10 , 99 , 17 ; 15 numbers
END