presentation on dtmf
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The document presents information on embedded systems and robotics. It discusses embedded systems, microprocessors, microcontrollers including the 8051 microcontroller. It then describes a project to build a DTMF controlled robot car using an 8051 microcontroller, motors, and other electronic and mechanical parts. The programming and circuit diagram used to control the robot car with DTMF signals is also presented.
presentation on dtmf
- 1. Presentation on Embedded System & Robotics Submitted To:- Submitted By:- Miss Nisha Dalal Neeraj Khatri 926/ECE/10
- 2. Introduction Embedded System:- ◦ Type of Computer System ◦ Combination of microprocessor based hardware & suitable software
- 3. Different Embedded Based Devices
- 4. Microprocessor Is a device which performs Arithmetic & Logic Operations. ◦ No inbuilt RAM ◦ No inbuilt ROM ◦ No inbuilt I/O ports ◦ Bulkier & Expensive
- 5. Microcontroller isdefined as combination of Microprocessor & its external units. ◦ Inbuilt RAM ◦ Inbuilt ROM ◦ Inbuilt I/O ports
- 6. 8051 Microcontroller 4-bit processor 128-byte of RAM 4-Kilobyte of onchip ROM Two Timers 4 I/O ports 1 Serial port 6 interupts
- 7. Internal Architecture CPU ◦ ALU ◦ CU ◦ MU 3 Buses ◦ Data bus ◦ Address bus ◦ Control bus
- 8. Pin Diagram AT89C51 IC is a 40 pin IC. DIP (Dual In-line package) 4 ports 2 supply pins 2 crystal pins 1 reset pin 3 control signal
- 9. Interrupts Any kind of emergency is called Interrupts. ◦ 6 interrupts RST 0000H INT0 0003H TF0 000BH INT1 0013H TF1 001BH Serial (TI & RI) 0023H
- 10. Project DTMF based ROBO Car ◦ On pressing 2, the robot will move forward ◦ On pressing 4, the robot will turn left ◦ On pressing 6, the robot will turn right ◦ On pressing 8, the robot will move backwards ◦ On pressing 5, the robot will stop
- 11. Electronics Part 1H bridge DTMF decoder 8051 Microcontroller
- 12. Mechanical Part Plywood Board 9cm x 7cm 2 DC motor 12V, 100rpm 2 Simple Wheels 1 Caster Wheel Nut & Bolts 2 Clamper
- 14. Assembly of all parts
- 15. Program M1CW EQU P0.0 M1CCW EQU P0.1 M2CW EQU P0.2 M2CCW EQU P0.3 ORG 0000H MAIN: MOV A,P2 CJNE A,#0F2H,NXT1 AJMP FWD NXT1: CJNE A,#0F4H,NXT2 AJMP LFT NXT2: CJNE A,#0F8H,NXT3 AJMP REW NXT3: CJNE A,#0F6H,NXT4 AJMP RGT
- 16. NXT4: CJNE A,#0F5H,MAIN AJMP STP FWD: SETB M1CCW SETB M2CCW CLR M1CW CLR M2CW AJMP MAIN REW: SETB M1CW SETB M2CW CLR M1CCW CLR M2CCW AJMP MAIN RGT: SETB M2CCW SETB M1CW CLR M2CW CLR M1CCW AJMP MAIN
- 17. LFT: SETB M2CW SETB M1CCW CLR M2CCW CLR M1CW AJMP MAIN STP: MOV P0,#11111111B AJMP MAIN