Difference between revisions of "S13: Garage Parking Aid"

Revision as of 06:11, 22 May 2013

Grading Criteria

How well is Software & Hardware Design described?
How well can this report be used to reproduce this project?
Code Quality
Overall Report Quality:
- Software Block Diagrams
- Hardware Block Diagrams
  Schematic Quality
- Quality of technical challenges and solutions adopted.

Garage Parking Aid

Garage Parking Aid

Abstract

The purpose of this project is to aid when parking a car. This device will send to an Android phone the distance between the car and an obstacle.

Objectives & Introduction

The purpose of this project is to build a parking aid that will measure the distance between an object and a car and send the data to the user's Android phone. An ultrasonic transmitter/receiver is used to measure the distance and bluetooth is used to send data to the Andoid phone.

Objectives:

Measure distance and display on computer screen
Send data over bluetooth

Bird's eye view

Team Members & Responsibilities

Elizabeth
- Create UART2 driver
- Wire peripherals
- Send messages with Bluetooth
Tian
- Create Android app
- Assemble project into a box
- Configure ultrasonic distance meter

Schedule

Week Number	Planned Items	Actual
1	Receive Bluetooth board Receive Ultrasonic board Complete Schedule	Receive bluetooth board Receive ultrasonic board complete schedule
2	Transmit a signal with bluetooth Andoid app created	bluetooth wired basic Android app created
3	Fix bluetooth bugs Ultrasound working properly with board	send data over bluetooth
4	Connect all components Test	Project put into casing
5	Working device Work on reports	Device is working Report is being done.

Parts List & Cost

Parts	Cost
SJ One Board	$65
Bluetooth	$0
2.4 GHz Antenna	$5
Ultrasonic transmitter and receiver	$10
Blackbox	$0
Wire	$10
Batteries	$7
Total:	$97

Design & Implementation

Hardware Design

The following hardware components are all that we used for this project. The LPC1758 Processor on the SJSU_ONE Development Board controls everything through the board. It activates the ultrasonic module, gets the time reading from it, computes the readings into distance and then transfer the data to bluetooth module, then the bluetooth module will send the received data to the Android Application on a paired bluetooth Android Device.

File:CmpE146 S13 T3 LPC1758.jpeg

SJSU_ONE Development Board

Bluetooth

Ultrasonic

2.4 GHz Antenna

Hardware Interface

Schematic

Hardware Communication: The development board is connected to the bluetooth chip and ultrasonic receiver/transmitter. The bluetooth receives data through the pins and transmits the data over bluetooth. The ultrasonic receives a trigger signal through the pins then sends an ultrasonic pulse. When the echo is read back it will send an echo pulse back to the board. The battery gives 5V power to development board and ultrasonic.

The Bluetooth device is connected to UART1 and the ultrasonic device is connected to GPIO. To communicate with the Bluetooth, the program sends data to UART1 and then is sent to bluetooth. To comunicate with the ultrasonic, the program sends and receives data from the board's pins P1.19 and P1.20.

Another option to capture the time of the ultrasonic's pulse is to program the GPIO pins to be PWM and capture. The PWM pin will output a pulse to the ultrasonic and the ultrasonic will send an ultrasonic pulse. When it receives an echo of the pulse it will send a pulse to the caputure pin. When the capture pin receives a change in voltage, it will store the time into a designated register.

Software Design

Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.

Implementation

This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.

Testing & Technical Challenges

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Include sub-sections that list out a problem and solution, such as:

Wifi Connection Issues

Many wifi connection issues were encountered. To solve this problem, a dedicated task was created to re-connect to wifi if the connection was ever lost.

Conclusion

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Project Video

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Project Source Code

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References

Acknowledgement

Preet Kang
Dr. Haluk Ozemek

References Used

List any references used in project.

Appendix

You can list the references you used.

@@ Line 163: / Line 163: @@
 The following hardware components are all that we used for this project. The LPC1758 Processor on the SJSU_ONE Development Board controls everything through the board. It activates the ultrasonic module, gets the time reading from it, computes the readings into distance and then transfer the data to bluetooth module, then the bluetooth module will send the received data to the Android Application on a paired bluetooth Android Device.
-[[File:CmpE_146_S13_GPA_LPC1758|center|frame|Bluetooth]]
+[[File:CmpE146_S13_T3_LPC1758.jpeg|center|frame|SJSU_ONE Development Board]]
 [[File:CmpE146_S13_T3_bluetooth2.jpg|center|frame|Bluetooth]]