sample 8051prgm
DESCRIPTION
cvcxTRANSCRIPT
Microprocessors and Microcontrollers
8051 programs
Microprocessors and Microcontrollers
• Write an 8051 program to fill the odd series from memory location 0030h to 0035h
ORG 0MOV R1,#30HMOV R2,#05MOV A,#1BACK:MOV @R1,AINC R1ADD A,#2DJNZ R2,BACKEND
Microprocessors and Microcontrollers
• Write an 8051 program to copy the string “Welcome to 8051 Programming” stored at 300H ROM space to RAM location starting at location 22H.
• Note: Loop should repeat exactly as the length of the string
Microprocessors and Microcontrollers
ORG 000CLR AMOV DPTR,#COUNTMOVC A,@A+DPTRMOV R1,AMOV DPTR,#MYDATAMOV R0,#22HBACK: CLR AMOVC A,@A+DPTRMOV @R0,AINC DPTRINC R0DJNZ R1,BACKHERE: SJMP HEREORG 300HMYDATA:DB "WELCOME TO JIITU !!!"COUNT:DB $-MYDATAEND
Indirect Addressing Mode
Indirect Addressing Mode
Microprocessors and Microcontrollers
Execute the above program with the string terminated by NULL character and without using the counter.
Microprocessors and Microcontrollers
ORG 000MOV DPTR,#MYDATAMOV R0,#22HBACK: CLR AMOVC A,@A+DPTRJZ HEREMOV @R0,AINC DPTRINC R0SJMP BACKHERE: SJMP HEREORG 300HMYDATA:DB "WELCOME TO JIITU !!!",0END
String Terminated by NULL Character
Indirect Addressing Mode
Microprocessors and Microcontrollers
Addition of two 8 bit number which are stored at 300H ROM space as DATA1 and DATA2
Microprocessors and Microcontrollers
ORG 000MOV DPTR,#DATA1BACK: CLR AMOVC A,@A+DPTRMOV R0,AMOV DPTR,#DATA2CLR AMOVC A,@A+DPTR ADD A,R0INC DPTRHERE: SJMP HEREORG 300HDATA1:DB 12HDATA2:DB 55HEND
Microprocessors and Microcontrollers
• Program to add the two consecutive memory locations stored at 50H ROM space using DATA directive and storing the result in next consecutive memory location. ORG 0
DATA1 DATA 0x50DATA2 DATA 0x51DATA3 DATA 0x52LJMP 250ORG 250MOV DATA1,#55hMOV DATA2,#22hMOV A,DATA1ADD A,DATA2MOV DATA3,AHERE: SJMP HEREEND
DATA directive
Microprocessors and Microcontrollers
• Computes Z = X + Y; Using EQU directive
ORG 0X EQU 66HY EQU 77HZ EQU 0MOV A,#XADD A,#YMOV Z,AMOV R0,ZHERE: SJMP HEREEND
EQU directive
Microprocessors and Microcontrollers
Write program to add R0,R1,R2,R3 of Bank-0, Bank-1, Bank-2, Bank-3 respectively.
P --OVRS0RS1F0ACCY PSW
Microprocessors and Microcontrollers
ORG 0CLR PSW.3CLR PSW.4CLR AMOV R0,#1ADD A,R0SETB PSW.3CLR PSW.4MOV R1,#2ADD A,R1CLR PSW.3SETB PSW.4MOV R2,#3ADD A,R2SETB PSW.3SETB PSW.4MOV R3,#4ADD A,R3END
BANK-0
BANK-1
BANK-2
BANK-3