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Embedded Systems

Embedded Systems. Today. Introduction to Mechatronics Microcontroller Input / Output Ports (I/O) Memory ADC PWM. Introduction to Mechatronics. http://en.wikipedia.org/wiki/Mechatronics_engineering. Embedded Systems.

merrill-cabrera
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Embedded Systems

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  1. Embedded Systems

  2. Today • Introduction to Mechatronics • Microcontroller • Input / Output Ports (I/O) • Memory • ADC • PWM

  3. Introduction to Mechatronics http://en.wikipedia.org/wiki/Mechatronics_engineering

  4. Embedded Systems • Special-purpose computer system designed to perform one or a few dedicated functions, often with real-time computing constraints. • Usually controls a device • Often meant for harsh environments • Designed to be optimized, reducing the size and cost of the product, or increasing the reliability and performance. • The Mun’der board is a embedded system

  5. Microcontroller • A microcontroller or embedded microprocessor is essentially a computer-on-a-chip. • They are used in everyday electronic devices, such as cellular telephones, household appliances, automobiles, etc. • In contrast to general-purpose microprocessors (the kind used in a PC) they are self-sufficient and cost-effective. • Anywhere you want to give a design a small amount of ‘intelligence’, or the ability to generate different outputs based on the given inputs. • Allows the system to be highly flexible

  6. Microcontrollers PIC18F4550 Microcontroller

  7. Microcontroller

  8. Microprocessor • The ‘brains’ of the microcontroller • Carries out programs instructions • Performs arithmetic and logic operations

  9. Memory • ROM - Read only Memory • Non-Volatile - Data retains in memory even when its power supply is removed. • RAM - Random Access Memory • Volatile - Data is lost when the power supply is removed. • Flash RAM – Random Access Memory • EEPROM - Electrically Erasable Programmable ROM • Used for instruction set, programs, variables.

  10. Microcontrollers - I/O • There are 5 input/output (I/O) ports on the PIC18F4550 microcontroller • Labeled A through E • The ports are Bi-directional, can accept input signal or send out a output signal • TRISB = 0x00; • 0 – Output • 1 – Input • Note: Don’t use A6 as I/O

  11. And Operation (Side Note) • Denoted by a ‘&’ • Used to single out bits of a port

  12. Microcontrollers - I/O • Input char var = PORTB & 0x01 • Output LATBbits.LATB0 = 1; LATB = 0x00;

  13. Microcontrollers - ADC • ADC - Analog to Digital Convertor • Class Notes • 10-bit ADCs on the PIC18F4550 microcontroller, on 13 channels • Code - Right Turn

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