Ultrasonic Sensor HC-SR04

Ernie PateniaTori Speer-Manson

11-6-14

Introducing...

4 Pins

• Vcc (5-20 [V])

• Trig• Echo• Gnd

SR04 Timing Diagram Organization of Timers TI RTOS Timers and HWI Timer MUX Pins Interrupt Vector Sheet

Outline

SR04 Timing Diagram

Organization of Timers

WTimer 2

Timer A Timer B

Timer 3

15 μs trigger (pulse)

http://img2.wikia.nocookie.net/__cb20120405104516/rainbowmagic/images/f/fb/Lightning_Bolt.jpg

Timer MUX Pins

• Wide Timer

http://www0.egr.uh.edu/courses/ece/ece4437/labsupport/TM4C123G%20Launchpad/tm4c123gh6pm_Datasheet.pdf

Interrupt Vector Sheet

*

http://www0.egr.uh.edu/courses/ece/ece4437/labsupport/TM4C123G%20Launchpad/tm4c123gh6pm_Datasheet.pdf

TI RTOS Timers

• Trigger Timer

TI RTOS Timers

• Echo Timer

TI RTOS HWI

Now for a short demonstration…

• Hardware Interrupt

Questions

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