SE-3910Real-time Systems

• Week 2, Class 3– Return Quiz, Q’s on HW Assignment?– Signals – Audio!– Review/Basic Circuits

• Kirkhoff’s Current & Voltage Law, Equivalent Resistance• Ohm’s Law, Switches, Potentiometers, & Pull-up resistors• How to burn up your Beaglebone (Didn’t cover)

• Quiz Tuesday at start of Lab 3– On prelab video, Beagleboard circuits, etc.

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling, Some from Dr. Hornick, etc.

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Upcoming Quiz:Topics[STALE: See Monday’s!]

• Prelab video – questions similar to the quiz at the end of Dr. Schilling’s video (TBA)

• How to burn up your Beaglebone• 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 Veff

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling2

Sketching & Listening to Waveforms

• Sine wave

• Square wave

• Sawtooth wave(s)

• Random wave

• Efffect of changing– Amplitude– Frequency– Phase (time shift)

On sound!

Also: Rise Time, Time Difference, Offset

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling3

A – 440[Didn’t discuss]

• The A above middle C– An American Standard - 1936 ASA (ANSI)– International – 1955, 75 (ISO-16)

• 440 Hz = 440 cps (archaic)• Used to tune most modern instruments

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling4

Pinout: Analog Discovery (Digilent)

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling5

PC

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling6

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-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling7

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling8

Expansion

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling9

A Cape

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling10

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling11

Finding GPIO Port

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling12

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling13

Resistor

Switch

Ground

BatterySource

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling14

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling15

ITM QTY REF PART DESCRIPTION DISTR PART #1 1   PCB 2-LAYER 3.4" x 2.15"    2 2 P1, P2 2x23 HDR FE DUAL - STRAIGHT SOCKET STRIP .025" SQ. PINS MLE SSHQ-123-D-08-F-LF3 1 P3 8 PIN HDR FE CONN HEADER FEMALE 8 POS 0.1" GOLD DK PPPC081LFBN-RC4 2 S1, S2 BUTTONS SWITCH TACT SPST-NO .05A 24V DK B3F-10005 2 D1, D2 LEDS LED GREEN 3MM 568NM 20mA 2.12V DK WP7104SGC6 2 R1, R2 RESISTOR RES 470 OHM 1/4W 5% CF MINI DK CFM14JT470R7 1 BR1 BREADBOARD WHT ADHSV SLDRLSS BRDBRD 170 TIE PT 1.8" x 1.37" PLU 14908 1   JMPR WIRE KIT 10 x 14 LNGTH .1" .2" .3" .4" .5" .6" .7" .8" .9" 1" 2" 3" 4" 5" SQR  

Class Example

SE-3910 - Dr. Josiah YoderSlide style: Dr. Hornick

Much Material: Dr. Schilling16