I found missing one instruction after SETB P3.3 instruction in the source code of , this instruction is
ANL A, R2 ; Get lower half(4h)of A, (#55 of Ch.2PPT)
Please insetrt it or recopy source code from updated Project 2 Supplement Material from BB.
The correct source code is below:
; Project 2Ans combining Project 1 with project 2
; system clock 100.0 Mhz, Update Freq. 1000
; from Project 1, calculate 18 + 13/5 + 12*3 - 20 =36d (24h)
MOV A,#13 ;|
MOV B,#5 ;|
DIV AB ;|
MOV R0,A ;|
MOV A,#18 ;|
ADD A,R0 ;|
MOV R0,A ;|
MOV A, #12 ;|
MOV B,#3 ;|
MUL AB ;|
ADD A,R0 ;|
MOV R0,#20 ;|
SUBB A,R0 ;| Result of Project 1 = 24h
; Load seg. code of Hex to data memory
MOV 30H, #11111111B ; STORE SEG CODE FOR "0"
MOV 31H, #11111001B ; STORE SEG CODE FOR "1"
MOV 32H, #10100100B ; STORE SEG CODE FOR "2"
MOV 33H, #10110000B ; STORE SEG CODE FOR "3"
MOV 34H, #10011001B ; STORE SEG CODE FOR "4"
MOV 35H, #10010010B ; STORE SEG CODE FOR "5"
MOV 36H, #10000010B ; STORE SEG CODE FOR "6"
MOV 37H, #11111000B ; STORE SEG CODE FOR "7"
MOV 38H, #10000000B ; STORE SEG CODE FOR "8"
MOV 39H, #10010000B ; STORE SEG CODE FOR "9"
MOV 3AH, #10001000B ; STORE SEG CODE FOR "A"
MOV 3BH, #10000011B ; STORE SEG CODE FOR "b"
MOV 3CH, #11000110B ; STORE SEG CODE FOR "C"
MOV 3DH, #10100001B ; STORE SEG CODE FOR "d"
MOV 3EH, #10000110B ; STORE SEG CODE FOR "E"
MOV 3FH, #10001110B ; STORE SEG CODE FOR "F"
MOV R2, #00001111B ; R2 IS a MASK
; MOV A, #11101111B ; ASSUME A = EFh for debug Proj.2 code
MOV B, A ; SAVE A IN B (24h)
START:
SETB P3.4
CLR P3.3 ; Lower half of A dispalys at position 2
ANL A, R2 ; Get lower half(4h)of A, (#55 of Ch.2PPT)
ADD A,#00110000B ; access seg. code in data memory
MOV R1, A
MOV A, @R1 ; indirect mode to load seg. code to A
MOV P1, A ; seg. code of lower half of A in P1
CALL DELAY
MOV A,B ; A = B = 24h
SWAP A ; for displaying hither half of A,(#55 of Ch.2PPT)
MOV B,A ; save 42h in B
SETB P3.3 ; Higher half of A dispalys at position 2 ANL A, R2 ; get lower half of A (2h)
ANL A, R2 ; Get lower half(4h)of A, (#55 of Ch.2PPT)
ADD A,#00110000B ; access seg. code in data memory
MOV R1, A
MOV A, @R1 ; indirect mode to load seg. code to A
MOV P1, A ; seg. code of lower half of A in P1
CALL DELAY
MOV A,B ;
SWAP A ; back original value of A = 24h
MOV B,A ; save 24h in B
JMP START ; repeat
DELAY: ; make delay
MOV R0,#200 ; delay 200 Clock cycles
DJNZ R0,$
RET