SE-3910 Real-time Systems Week 3, Class 1 – Beaglebone Documentation (cont.) – Review/Basic Circuits (cont.) Switches & Pull-up resistors How to burn up.

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Presentation transcript:

SE-3910 Real-time Systems Week 3, Class 1 – Beaglebone Documentation (cont.) – Review/Basic Circuits (cont.) Switches & Pull-up resistors How to burn up your Beaglebone – Review coding in C – UML diagrams (perhaps) Quiz Tomrrow at start of Lab 3 – See later slide SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling, Some from Dr. Hornick, etc. 1

Whole-class Quiz! (1) What is the key item which defines an embedded system versus a non-embedded system a.Hardware only design b.Software only design c.Designed to run on a general purpose computer d.A combination of hardware and software e.Always written in C++ SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 2

Whole-class Quiz! (2) What is the key factor which defines a real time system versus a non real time system a.Fast I/O b.Small systems c.Meets deadlines d.High speed operation e.Correct logic SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 3

Whole-class Quiz! (3) What is the voltage across R2? SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 4

Ohm’s Law SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 5

Upcoming Quiz:Topics Prelab video – questions similar to the quiz at the end of Dr. Schilling’s video Practiced – How to burn up your Beaglebone Not yet practiced: – Beaglebone I/O circuits – Locating a pin on board (will supply necessary figures!) – Label amplitude, peak-to-peak voltage, pulse- width, etc. on a waveform & compute V eff SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 6

How to Burn Up Your Beaglebone … for fun and profit … Clean up: – Plug ground into power By using alternate power supply – Overpower: >5.1 V input By using alternate power supply – Putting power on IO pins before powering By using alternate power supply – Putting 5V into 3.3 V to the expansion headers By plugging into the wrong pin Even through resistor! – Analog max voltage even lower V Configure digital input as analog input Plug 5V signal into analog input – Don’t pull the microSD card out – push in to eject – Don’t ground an output More on this later… SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 7

PC SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 8 Contains separate Microprocessor(s) Memory Peripheral (I/O) device HW serial port parallel port USB port Bluetooth port IR port AGP port WiFi port,…

Beaglebone SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 9

SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 10

Expansion SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 11

A Cape SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 12

SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 13

Finding GPIO Port SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 14

SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 15 Resistor Switch Ground Battery

A simple input circuit SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 16

Power of a signal (If time) P = IV I = V/R P = … Let R = 1 (Ohm) What is the instantaneous power of a sinusoid? What is the average power of a sinusoid? What is the average power of a PWM signal? SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 17

SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 18

SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 19 ITMQTYREFPARTDESCRIPTIONDISTRPART # 11 PCB2-LAYER 3.4" x 2.15" 22P1, P22x23 HDR FEDUAL - STRAIGHT SOCKET STRIP.025" SQ. PINSMLESSHQ-123-D-08-F-LF 31P38 PIN HDR FECONN HEADER FEMALE 8 POS 0.1" GOLDDKPPPC081LFBN-RC 42S1, S2BUTTONSSWITCH TACT SPST-NO.05A 24VDKB3F D1, D2LEDSLED GREEN 3MM 568NM 20mA 2.12VDKWP7104SGC 62R1, R2RESISTORRES 470 OHM 1/4W 5% CF MINIDKCFM14JT470R 71BR1BREADBOARDWHT ADHSV SLDRLSS BRDBRD 170 TIE PT 1.8" x 1.37"PLU JMPR WIRE KIT10 x 14 LNGTH.1".2".3".4".5".6".7".8".9" 1" 2" 3" 4" 5"SQR

Class Example SE Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling 20