MICROPROCESSORS AND INTERFACING ECX4236 LAB REPORT 01
NAME
: J.B.S.THYRIAR
REG. NO
: 211088830
GROUP NO
: CLE-04
DATE OF PERFORMANCE
: 19/12/2014
EXPERIMENT: Study the components of the board AES-51 and experiencing the Assembly
Language using the MCU IDE.
AIMS AND OBJECTIVES
Study the components of the board AES-51
Checking the I/O ports of the board.
Studying the machine cycle and the execution process of the board.
Using AES-51 board with PC.
THEORY
Power Up: The AES-51 board can be powered up by 7 to 15v AC-DC adaptor or 6v battery. The AC adaptor output wire should be connected to the AES-51 such that the positive terminal and negative terminal correspondingly. Connect 15v AC to the adaptor. And then when the power switch is slide the system –on LED should light up. Then in LCD screen will output a message as “AES Basic -52 1.0 system ready”. Then we run the self-test as below. - Do the self test 1. First press the “test key”. Then this will appear.
2. Again press the test key to proceed “Test #01”. If you want to do the same test again press any other key except “test key”. This is the digital output channel test. Four output LEDs turned on for a few seconds & turn off.
3. Then press the “test key” to proceed “Test #02”. Repeat procedure is same as above for all occasions. After that ground the I1, I2 & I3 by connecting to a GND using piece of wire respectively and repeat the “Test #02”. This is the digital input channel test.
4. Again press the “test -key” to proceed “Test #03”. Then connect +5V to the A/D input and repeat the “Test #03”. This is the analog I/O block test.
Then connect the +5v to the LED and repeat the test #3. The following will be displayed.
5. Then press the “test key” to proceed “Test #04”. This is the serial port test. Since in this time there are no devices connect to the serial port we can’t see any changeof the display.
6. Finally by pressing the test key again we can end the self test.
7. In each step observe the output.
Enter the machine code programme and execute 1. Power-up the AES-51 board. 2. Enter and execute the machine code programme, according to the book and observe the outputs.
Run the machine code programme with different memory ranges and observe the output.
APPARATUS
AES-51 development board
Personal computer with a serial port
Serial connector cable
AC-DC power adapter
Piece of wire
PROCEDURE
1. Study and Identify the components of the board AES-51 2. When it is used in stand-alone mode the following are done. 3. Connect the DC power adapter to the board. 4. Do the self-test by going through the instructions given in the book according to the theory. 5. Enter and execute the machine code program and check the outputs of accordingly. 6. Thereafter start using the AES-51 board with the PC by connecting via serial port connector. 7. Connect the AES-51 board and the PC using a serial cable. 8. Power up the PC. 9. Double check whether the ASM.EXE and TX.EXE are available and power up the AES51 board. 10. Follow the instruction set in the theory and check the O/P accordingly. 11. Understand the machine cycles and the assembly language used to execute the tasks.
OBSERVATIONS
By setting up the configuration which is given in the book we can run the programme and execute our task.
1) Blinking a single LED 0094
1 2 3 4
0000 C294 0002 110A 0004 D294 0006 110A 0008 80F6
P1_4 BIT
094H
ORG 0000H MAIN: CLR P1_4 ACALL DELAY SETB P1_4 ACALL DELAY SJMP MAIN
5 6 7 8 9 10 11 000A 79FF 12 DELAY:MOV R1,#255 000C 7A02 13 LOOP3:MOV R2,#2 000E 7B2B 14 LOOP2:MOV R3,#43 0010 DBFE 15 LOOP1:DJNZ R3,LOOP1 0012 DAFA 16 DJNZ R2,LOOP2 0014 D9F6 17 DJNZ R1,LOOP3 0016 22 18 RET 19 END ASSEMBLY COMPLETE, NO ERRORS FOUND, NO WARNINGS
2) Blinking 4 LEDs in PORT 1 0094 0095 0096 0097
7000 7000 C294 7002 C295 7004 C296 7006 C297 7008 1116 700A D294 700C D295 700E D296 7010 D297 7012 1116 7014 80EA
7016 79FF
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
P1_4 P1_5 P1_6 P1_7
BIT BIT BIT BIT
094H 095H 096H 097H
ORG 7000H MAIN: CLR P1_4 CLR P1_5 CLR P1_6 CLR P1_7 ACALL DELAY SETB P1_4 SETB P1_5 SETB P1_6 SETB P1_7 ACALL DELAY SJMP MAIN
DELAY:MOV R1,#255
7018 7A02 701A 7B2B 701C DBFE 701E DAFA 7020 D9F6 7022 22
22 LOOP3:MOV R2,#2 23 LOOP2:MOV R3,#43 24 LOOP1:DJNZ R3,LOOP1 25 DJNZ R2,LOOP2 26 DJNZ R1,LOOP3 27 RET 28 END
VERSION 1.2h ASSEMBLY COMPLETE, 0 ERRORS FOUND 3) By using the MCU IDE simulating and observing the Seven Segment output for 0 to 9 numbers. The Delay programme is used.
0090 0091 0092 0093 0094 0095 0096 0097
0000 7590C0 0003 1134 0005 7590F9 0008 1134 000A 7590A4 000D 1134 000F 7590B0 0012 1134 0014 759099 0017 1134 0019 759092 001C 1134 001E 759082 0021 1134 0023 7590F8 0026 1134 0028 759080 002B 1134 002D 759098 0030 1134 0032 80CC
1 2 3 4 5 6 7 8 9 10 11
P1_0 P1_1 P1_2 P1_3 P1_4 P1_5 P1_6 P1_7
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
BIT BIT BIT BIT BIT BIT BIT BIT
090H 091H 092H 093H 094H 095H 096H 097H
ORG 0000H MAIN: MOV P1, #11000000B ACALL DELAY MOV P1, #11111001B ACALL DELAY MOV P1, #10100100B ACALL DELAY MOV P1, #10110000B ACALL DELAY MOV P1, #10011001B ACALL DELAY MOV P1, #10010010B ACALL DELAY MOV P1, #10000010B ACALL DELAY MOV P1, #11111000B ACALL DELAY MOV P1, #10000000B ACALL DELAY MOV P1, #10011000B ACALL DELAY SJMP MAIN
34 0034 7905 35 DELAY:MOV R1,#5 0036 7A05 36 LOOP3:MOV R2,#5 0038 7B05 37 LOOP2:MOV R3,#5 003A DBFE 38 LOOP1:DJNZ R3,LOOP1 003C DAFA 39 DJNZ R2,LOOP2 003E D9F6 40 DJNZ R1,LOOP3 0040 22 41 RET 42 END ASSEMBLY COMPLETE, NO ERRORS FOUND, NO WARNINGS
Discussion
When it comes to microcontrollers it is a single task processor which have memory in them and have programmable Input/Outut peripherals. Small amount of inbuilt ROM & RAM are contained as program memory. Analog to Digital convertors and some other features are there in the chip itself.
Microcontroller hacve some advantages comparing to microprocessors such as, easy to use, cheap and user friendly. As a drawback they have only limited capacity. Microprocessors are powerful than microcontrollers but for embedded applications microcontrollers are commonly used. When using the board AES-51 we came across so many basic ideas which clearly explains the memory management of the microcontroller and it addressing techniques. While using the MCU 8051-IDE for the simulation purpose we had to calculate the exact values to move to R3, R2, R1 so that the delay value will match with excpected value exactly. And when the origin of the program was given as 7000H and simulated it poped up an error message saying the program memory of the board isnt enough to load the code. Then thereafter the origin was set to 0000H and simulated with no erro rs.
When trying out a 7 segment diplay program the ports were addressed in binary so that all the bits of a port can be clearly enabled or disabled accordng to the number which was desired to output. This lessen the code enormerously and eased up the simulation.
