Lab Manual Ee2356 Microprocessor and Micro Controller
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EE2356 MICROPROCESSOR AND MICRO CONTROLLER LABORATORY 8-bit Microprocessor 1. Simple arithmetic operations: Multi precision addition / subtraction / multiplication / division. 2. Programming with control instructions: Increment / Decrement, Ascending / Descending order, Maximum / Minimum of numbers,Rotate instructions Hex / ASCII / BCD code conversions. 3. A/D Interfacing. 4. D/A Interfacing. 5. Traffic light controller interfacing 6. Steeper Motor Interfacing 7. Simple experiments using 8251, 8279, 8254. 16-bit Microprocessor 8. Simple arithmetic operations: Multi Precision addition / substraction/multiplication / division. 8-bit Microcontroller 9. Demonstration of basic instructions with 8051 Micro controller execution, including: a. Conditional jumps, looping b. Calling subroutin es. c. Stack parameter testing 10. Interfacing Keyboard and Display 11. Stepper motor Interfacing\ a. D/A Interfacing b. Traffic light controller Interfacing c. 8051 based Serial Port Communication.
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PROGRAM:
ADDRESS LABEL MNEMONICS OPCOCDE COMMENTS
MOV R0, #01HMOV R1, #02H
MOV R2, #04H
MOV P1, R0
LCALL DELAY1
MOV P1, R1
LCALL DELAY2
MOV P1, R2
LCALL DELAY1
MOV P1, R1
LCALL DELAY2
LJMP START
Initialize R0 to make P1.0 high.Initialize R1 to make P1.1high.Initialize R2 to make P1.2
high.Make P1.0 high
Wait for 20 seconds
Make P1.1 high
Wait for 5 seconds
Make P1.2 high
Wait for 20 seconds
Make P1.1 high
Wait for 5 seconds.
Jump to start.
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TRAFFIC LIGHT CONTROL:
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RESULT:
Thus traffic light control using 8051 microcontroller was performed
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XI (C) 8051 SERIAL PORT COMMUNICATION
AIM:
To write assembly language program to receive bytes serially with baud rate 9600, 8-bit data and 1 stopbit. Simultaneously sent received bytes to port2.
APPARATUS REQUIRED:
(i) 8051 microcontroller
(ii) Power supply
ALGORITHM:
1. Load the TMOD register with the value 20H to use timer 1 in mode 2 to set the baud rate.
2. Load TH1 to set the desire baud rate for serial data transfer.
3. Load SCON register with the value 50 H to use serial mode 1, where an 8-bit data is framed with startand stop bits.
4. Set TR1 to 1 to start timer 1.
5. Clear the RI with CLR RI instruction.
6. Check the RI flag bit with instruction JNB RI, XXXX to see if an entire character has been receivedyet.
7. If RI is set, SBUF has the byte. Save this byte.
8. Go to step 5 to receive the next character.
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PROGRAM:
ADDRESS LABEL MNEMONICS OPCOCDE COMMENTS
HERE
MOV TMOD, #20HMOV TH1, #FDH
MOV SCON, #50H
SETB TR1
JNB RI, HERE
MOV A, SBUF
MOV P2, A
CLR RI
SJMP HERE
Timer 1, mode 29600 baud rate
8-bit, 1-stop, REN enabled
Start timer 1
Wait for character receiveCompletelySave the received character
Sent character to port 2
Get ready to receive next byte
Go to receive next character
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XI (C) 8051 SERIAL PORT COMMUNICATION
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RESULT:
Thus the data was received in port 2 using 8051 serial port communication.
