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Varsha patil AISSMS IOIT Pune mca te pu book
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Varsha patil AISSMS IOIT Pune mca te pu book Varsha patil AISSMS IOIT Pune mca te pu book Presentation Transcript

  • CHAPTER 6 SYSTEM DESIGNMicrocontroller and applications ILLUSTRATED BY Varsha Patil
  • THE MICROCONTROLLER BASEDDESIGN STEPS 6.4.1 Methodology Steps STEP I Justification STEP II Operations Definition STEP III Instruction Set Definition STEP IV Architecture Definition STEP V Arithmetic Logic Unit (Design and Implementation) STEP VI The Register File STEP VII The Instruction Register STEP VIII Data Path for data processing and Control Signal Table STEP IX The PC, Jump and data transfer instructions STEP X The Control Unit
  • Increased productivity yields shorter development cycles with more product features and reduced time to market,Reduced Non-Recurring Engineering (NRE) costs,Design reuse is enabled,Increased flexibility to design changes,
  • MICROCONTROLLER PERFORMANCEFACTORS(a) Speed, size, power cost design time and manufacture cost. (b) Architecture : (i) Von Neumann, (ii) Harvard (c) Chip Area. (d) Simulation and hardware implementation.
  • Data Distribution System
  • Factors to be considered for designing aDAS While designing data acquisition system following factors are required to be considered : • Is it a fixed or a mobile application ? • Type of input/output signal : digital or analog ? • Frequency of input signal ? • Resolution, range, and gain ? • Continuous operation ? • Compatibility between hardware and software. Are the drivers available ? • Overall price.
  • Algorithm, Total Number of Lines required : (A) Algorithm : 1. Start. 2. Select the channel. 3. A Low – High transition on ALE to latch in the address. 4. A Low – High transition on Start to reset the ADC’s SAR. 5. A High – Low transition on ALE. 6. A High – Low transition on start to start the conversion. 7. Wait for End of cycle (EOC) pin to become high. 8. Make Output Enable pin High. 9. Take Data from the ADC’s output. 10. Make Output Enable pin Low. 11. Stop. (B) Total Number of Lines required : The total numbers of lines required are total 12 lines, which contain some of the lines like : • Data lines : 8 numbers. • ALE line : 1 number. • START line : 1 number • EOC line : 1 number Output Enable line : 1 number • We can directly connect the OE pin to Vcc. Moreover instead of polling for EOC just put some delay so instead of 12 lines we will require 10 lines. • We can also provide the clock through the controller thus eliminating the need of external circuit for clock.
  • 9 CASE STUDY 2 : ROBOT DEVELOPMENTTypes of RobotsTechnologies That Go to Make up a Robot 3 Classes of Robots6 Advantages of Robots7 Disadvantages of Robots
  • Interfacing Diagram for AT89C2051 and H-Bridge Driver L293D(With 5 Volt Power Supply Arrangement)
  • LM324 Comparator IC Used for Sensing Black Strips
  • signaling. Inputs Function Vin H = H C = H; D = L Turn Right Vin H = H C = L; D = H Turn Left C=D Fast Motor Stop Vin H = L C = X; D = X Free Running Motor Stop L = Low, H = High, X = Don’t Care Use of L293 forms an H-Bridge for bidirectional DC motor driver
  • : Connection and Timing Diagram for LineTracking Sensor
  • Case I : Clockwise Direction : When A0 = high; A3 = high; & A1 = low; A2 = low. The motor rotates in clockwise direction. Case II : Anti-Clockwise Direction : When A0 = low; A3 = low; & A1 = high; A2 = high. The motor rotates in anti-clockwise direction. Case III : Motor Stops the Rotation When A0 = low; A3 = low; A1 = low; A2 = low The motor stops the rotation.
  • Circuit Diagram of IR Transmitter   Fig. 6.20 : Circuit diagram of IR rtransmitterand Receiver
  •  What is TCP/IP ? (IMP) (a) TCP/IP stands for Transmission Control Protocol/Internet Protocol. (b) TCP/IP is the communication protocol for communication between computers on the Internet. (c) A computer communication protocol is a description of the rules computers must follow to communicate with each other. (d) TCP/IP defines how electronic devices (like computers) should be connected to the Internet, and how data should be transmitted between them. The TCP/IP Protocol Architecture(1) Main unit (2) Data acquisition module (3) Data processing module
  • Data Processing Module andThe Moving Characteristics of the Wheel Control
  • Interfacing ATmega8535 with CMPS03(Left) and the Wheel Rotation Counter (Right