Difference between revisions of "F16: I2Coffee"

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=== Grading Criteria ===
 
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<font color="green">
 
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*  How well is Software & Hardware Design described?
 
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*  How well can this report be used to reproduce this project?
 
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*  Code Quality
 
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*  Overall Report Quality:
 
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**  Software Block Diagrams
 
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**  Hardware Block Diagrams
 
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**:  Schematic Quality
 
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**  Quality of technical challenges and solutions adopted.
 
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</font>
 
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== Project Title ==
 
−
 
 
== Abstract ==
 
== Abstract ==
−
This section should be a couple lines to describe what your project does.
+
Mixing coffee has been a part of many people in their morning. [http://www.socialledge.com/sjsu/index.php?title=Embedded_System_Tutorial_UART UART] Coffee aims to make that process more enjoyable. UART Coffee is a coffee maker machine that allows its user to pick from different types of coffee powders and choose their desired coffee temperature.
  
 
== Objectives & Introduction ==
 
== Objectives & Introduction ==
−
Show list of your objectives.  This section includes the high level details of your project. You can write about the various sensors or peripherals you used to get your project completed.
+
The objective of this project was to create a coffee making machine that was included two microcontrollers communicating with each other. A list of high-level objectives will be listed below.
 +
 
 +
*  Establish communication between 2 microcontrollers using UART
 +
* User interaction with the machine through the use of the buttons
 +
*  Alarm user when the coffee has reached the desired temperature
 +
*  Learn to interface different I/O components with the SJSU One board
 +
*  Program servo motors to allow flow of the different coffee flavors
 +
* Attach a cooling system so that the coffee's temperature drops if it is desired
 +
*  Add a DC Motor so we are able to stir the coffee
  
 
=== Team Members & Responsibilities ===
 
=== Team Members & Responsibilities ===
−
*  <b>Man Hin Wong</b>
+
*  <b>Man Hin Wong</b>
−
** 
+
*  Email: wongmanhin@msn.com
−
*  Emil: wongmanhin@msn.com
+
* Implementation, code development, and testing
−
** 
+
 
 +
<br>
 
*  <b>Mauricio Rivera</b>
 
*  <b>Mauricio Rivera</b>
−
** 
 
 
*  Email: mauricio.rivera1993@yahoo.com
 
*  Email: mauricio.rivera1993@yahoo.com
−
** 
+
* Design, code development, and documentation
 +
<br>
  
 
== Schedule ==
 
== Schedule ==
−
Show a simple table or figures that show your scheduled as planned before you started working on the project.  Then in another table column, write down the actual schedule so that readers can see the planned vs. actual goals.  The point of the schedule is for readers to assess how to pace themselves if they are doing a similar project.
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<center>
−
 
 
−
 
 
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 43: Line 36:
 
| 11/4
 
| 11/4
 
| Finalize schedule and materials.
 
| Finalize schedule and materials.
−
| Pending.
+
| <font color="green">Done</font>
 
|-
 
|-
 
! scope="row"| 2
 
! scope="row"| 2
 
| 11/11
 
| 11/11
 
| Design schematic with slave and master board.
 
| Design schematic with slave and master board.
−
| Pending.
+
| <font color="green">Done</font>
 
|-
 
|-
 
! scope="row"| 3
 
! scope="row"| 3
 
| 11/18
 
| 11/18
−
| Test I2C code and enhance it.
+
| Test code and enhance it.
−
| Pending.
+
| <font color="green">Done</font>
 
|-
 
|-
 
! scope="row"| 4
 
! scope="row"| 4
 
| 11/25
 
| 11/25
 
| Debug and enhance code.
 
| Debug and enhance code.
−
| Pending.
+
| <font color="green">Done</font>
 
|-
 
|-
 
! scope="row"| 5
 
! scope="row"| 5
 
| 12/2
 
| 12/2
 
| Start building project.
 
| Start building project.
−
| Pending.
+
| <font color="green">Done</font>
 
|-
 
|-
 
! scope="row"| 6
 
! scope="row"| 6
 
| 12/9
 
| 12/9
 
| Test prototype.
 
| Test prototype.
−
| Pending.
+
| <font color="green">Done</font>
 
|-
 
|-
 
! scope="row"| 7
 
! scope="row"| 7
 
| 12/16
 
| 12/16
−
| Finalize project and demo.
+
| Finishing touches.
−
| Pending.
+
| <font color="green">Done</font>
 +
|-
 +
! scope="row"| 8
 +
| 12/20
 +
| Finalize project for demo.
 +
| <font color="green">Done</font>
 
|}
 
|}
 +
</center>
  
 
== Parts List & Cost ==
 
== Parts List & Cost ==
−
Give a simple list of the cost of your project broken down by components. Do not write long stories here.
+
<center>
 +
{| class="wikitable"
 +
|-
 +
! scope="col"| Item
 +
! scope="col"| Quantity
 +
! scope="col"| Cost (1)
 +
|-
 +
! scope="row"| SJSU One Board
 +
| 2
 +
| $80
 +
|-
 +
! scope="row"| 5V DC Motors
 +
| 2
 +
| $2
 +
|-
 +
! scope="row"| 5V Servos
 +
| 2
 +
| $3
 +
|-
 +
! scope="row"| Shoe Box
 +
| 1
 +
| $0
 +
|-
 +
! scope="row"| 12V Fan
 +
| 1
 +
| $2
 +
|-
 +
! scope="row"| Transistor (ST953)
 +
| 2
 +
| $1
 +
|-
 +
! scope="row"| Resistors
 +
| 3
 +
| $0.30
 +
|-
 +
! scope="row"| Water valve
 +
| 1
 +
| $3
 +
|-
 +
! scope="row"| Water continer
 +
| 3
 +
| $0.10
 +
|}
 +
</center>
 +
 
 +
== System Design ==
 +
<center>
 +
[[File:CmpE146_F16_T3_UARTCoffee.jpg|300px|thumb|left|Figure 1. UART Coffee System Design]]
 +
</center>
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== Design & Implementation ==
 
== Design & Implementation ==
−
The design section can go over your hardware and software design. Organize this section using sub-sections that go over your design and implementation.
+
=== Hardware Design ===
 +
<b>Block diagram</b>
 +
[[File:CmpE146_F16_T3_BlockDiagram.PNG|500px|thumb|left|Figure 2. UART Coffee's block diagram]]
  
−
=== Hardware Design ===
+
<b>Hardware Pin Out</b>
−
Discuss your hardware design here. Show detailed schematics, and the interface here.
+
{| class="wikitable"
 +
|-
 +
! scope="col"| I/O
 +
! scope="col"| Pin(s)
 +
! scope="col"| Name
 +
|-
 +
! scope="row"| Step Motor 1
 +
| P0.29, P0.30
 +
| GPIO
 +
|-
 +
! scope="row"| Step Motor 2
 +
| P1.22, P1.23
 +
| GPIO
 +
|-
 +
! scope="row"| Cooling Fan
 +
| P0.0
 +
| GPIO
 +
|-
 +
! scope="row"| Stirring Motor
 +
| P0.1
 +
| GPIO
 +
|-
 +
|}
 +
 
 +
[[File:CmpE146_F16_T3_UARTCoffeeCircuit.PNG|500px|thumb|left|Figure 3. Full Circuit for the harware and SJ One Board]]
  
 
=== Hardware Interface ===
 
=== Hardware Interface ===
−
In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the '''Software Design''' section is isolated to talk about high level workings rather than inner working of your project.
+
<b>Hardware Used</b>
 +
<ul>
 +
  <li>Transistor (st953)</li>
 +
  <li>Resistors(10Ω and 100Ω)</li>
 +
  <li>5v DC Motor</li>
 +
  <li>12V Fan</li>
 +
  <li>5v Step Motor</li>
 +
  <li>Water Valve</li>
 +
  <li>Bread Board</li>
 +
  <li>Jumper Cables</li>
 +
</ul>
 +
<br>
 +
 
 +
<b>Interfacing</b>
 +
<br>
 +
The coffee making machine uses [http://www.socialledge.com/sjsu/index.php?title=Embedded_System_Tutorial_UART UART]to establish communication between two microcontrollers using their Tx and Rx pins, more specifically UART2. The first SJSUOne board is used to control the motor to stir the coffee, step motor for coffee powder flow, and the cooling system. The second microcontroller is used to control the switches for user interaction and also to transmit temperature data to the first board. Since the boards can only supply 3.3V, a transistor connected to 5V was used so that the different I/O components can receive their appropriate voltage. The stepper motors have more wires than the regular DC motors, so more than one pin was needed to use them. The only non-electronic component of our design is the water valve, this is because of security measures.
 +
 
 +
<br>
 +
<br>
 +
<br>
 +
<br>
 +
<br>
 +
<br>
  
 
=== Software Design ===
 
=== 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.
+
 
 +
The software of this machine is designed to interact with the user so that the user's needs are met. The buttons on the board are programmed to control the options for coffee beans, temperature, and the mixing. During the UART transmission (9600bps), the transmitting board sends a 10-bit message to the receiving board that includes the user's choices. After receiving the message, the receiving boards takes over and begins the coffee mixing process.
 +
 
 +
[[File:CmpE146_F16_T3_UARTCoffeeStateDiagram.PNG|500px|thumb|left|Figure 4. UART Coffee State Diagram]]
 +
 
 +
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<br>
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<br>
 +
<br>
  
 
=== Implementation ===
 
=== 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 ==
+
<b>Motors and Transistor Interface</b>
−
Describe the challenges of your project.  What advise would you give yourself or someone else if your project can be started from scratch again?
+
[[File:CmpE146_F16_T3_TransistorMotor.PNG|500px|thumb|left|Figure 5. Transistors and Motors connected.]]
−
Make a smooth transition to testing section and described what it took to test your project.
+
 
 +
<b>Connecting Transitor to I/O component</b>
 +
<ol>
 +
  <li>Connect power supply (5V) to bread board</li>
 +
  <li>Emmitter is connected to resistor (100 Ohms)</li>
 +
  <li>Resistor connects to board's GPIO pin</li>
 +
  <li>Base pin Connected to component's ground</li>
 +
  <li>Component's Vcc connected to power supply</li>
 +
  <li>Collector pin goes to power supply's ground</li>
 +
</ol>
 +
 
 +
 
 +
 
 +
<br>
 +
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<br>
 +
 
 +
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 +
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 +
 
 +
<b size="6">Sytem Operation Procedure</b>
 +
<ol>
 +
  <li>Press START Button on the the receiver board</li>
 +
  <li>Transmitter board can select options (Temperature and Coffee type)</li>
 +
  <li>User confirms options by pressing button 4, CONFIRM</li>
 +
  <li>Transmitter board sends 10-bit message to receiver with all the options</li>
 +
  <li>Receiver takes control of operations</li>
 +
  <li>Starts pumping out selected coffee powder</li>
 +
  <li>Sleeps for 10 seconds to wait for water to be pured in</li>
 +
  <li>Activates stirring mechanism for 5 seconds</li>
 +
  <li>Activated cooling system to achieve desired temperature</li>
 +
  <li>Coffee is now READY</li>
 +
</ol>
  
−
Include sub-sections that list out a problem and solution, such as:
+
== Testing & Technical Challenges==
  
 
=== My Issue #1 ===
 
=== My Issue #1 ===
−
Discuss the issue and resolution.
+
Some of the GPIO Pins cannot support enough current or voltage for our I/O devices. For example, when wanting to control a motor by the board, we couldn't get it done by simply connecting directly to the board because the pin supplies 3.3V and 0.1A.
 +
 
 +
<b>Solution:</b>
 +
Connecting a transistor between the motor and the SJSUOne board allowed the board to have control over the device and activate it when needed.
 +
 
 +
=== My Issue #2 ===
 +
Our coffee machine encountered a problem when wanting the coffee powder to slide down to the cup. This did not let the powder get to the cup, so our design could not function correctly.
 +
 
 +
<b>Solution:</b> We tilted our design to a 45-degree angle to that our ramp is steep enough to get the coffee powder into the cup.
 +
 
 +
=== My Issue #3 ===
 +
We wanted to have a water control system so that our coffee machine can provide water. Adding liquids to the design can be dangerous because it can cause a short circuit and mess the entire project up.
 +
 
 +
<b>Solution:</b> We added a water valve to the opposite side of the circuit. This allowed enough space between any wire and the water.
  
 
== Conclusion ==
 
== Conclusion ==
−
Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?
+
 
 +
The UART Coffee making machine was a learning experience for both of us. We learned to interface different components to the microcontroller even if the microcontroller's 3.3V was insufficient. The hardest part of this project was getting the UART communication between the two boards, however, working together made it easier because one partner was able to check the other person's work. A non-techincal hurdle we faced was timing because we both had different schedules due to finals, so working together was only possible after finals. Overall, we are pleased with our project's results and the knowledge we picked up and reinforced along the way.
  
 
=== Project Video ===
 
=== Project Video ===
−
Upload a video of your project and post the link here.
+
*  [https://www.youtube.com/watch?v=oaSOQO89uX4 Video Demo]
  
 
=== Project Source Code ===
 
=== Project Source Code ===
 
*  [https://sourceforge.net/projects/sjsu/files/CmpE_S2016/ Sourceforge Source Code Link]
 
*  [https://sourceforge.net/projects/sjsu/files/CmpE_S2016/ Sourceforge Source Code Link]
  
−
== References ==
 
 
=== Acknowledgement ===
 
=== Acknowledgement ===
−
Any acknowledgement that you may wish to provide can be included here.
+
We would like to thank Preet and Professor Ozemek for helping us throughout the class. Also, thank Kenneth and Amy for supporting us during the days that we worked on this project. Finally, we want to thank professor Harry Li for allowing us to use Engr 268 as a working space.
  
 
=== References Used ===
 
=== References Used ===
−
List any references used in project.
+
*[http://www.socialledge.com/sjsu/index.php?title=Embedded_System_Tutorial_UART UART]
  
 
=== Appendix ===
 
=== Appendix ===
−
You can list the references you used.
+
*[http://www.nxp.com/documents/user_manual/UM10360.pdf LPC1758 Datasheet]

Latest revision as of 06:37, 23 December 2016

Abstract

Mixing coffee has been a part of many people in their morning. UART Coffee aims to make that process more enjoyable. UART Coffee is a coffee maker machine that allows its user to pick from different types of coffee powders and choose their desired coffee temperature.

Objectives & Introduction

The objective of this project was to create a coffee making machine that was included two microcontrollers communicating with each other. A list of high-level objectives will be listed below.

  • Establish communication between 2 microcontrollers using UART
  • User interaction with the machine through the use of the buttons
  • Alarm user when the coffee has reached the desired temperature
  • Learn to interface different I/O components with the SJSU One board
  • Program servo motors to allow flow of the different coffee flavors
  • Attach a cooling system so that the coffee's temperature drops if it is desired
  • Add a DC Motor so we are able to stir the coffee

Team Members & Responsibilities

  • Man Hin Wong
  • Email: wongmanhin@msn.com
  • Implementation, code development, and testing


  • Mauricio Rivera
  • Email: mauricio.rivera1993@yahoo.com
  • Design, code development, and documentation


Schedule

Week# Date Task Actual
1 11/4 Finalize schedule and materials. Done
2 11/11 Design schematic with slave and master board. Done
3 11/18 Test code and enhance it. Done
4 11/25 Debug and enhance code. Done
5 12/2 Start building project. Done
6 12/9 Test prototype. Done
7 12/16 Finishing touches. Done
8 12/20 Finalize project for demo. Done

Parts List & Cost

Item Quantity Cost (1)
SJSU One Board 2 $80
5V DC Motors 2 $2
5V Servos 2 $3
Shoe Box 1 $0
12V Fan 1 $2
Transistor (ST953) 2 $1
Resistors 3 $0.30
Water valve 1 $3
Water continer 3 $0.10

System Design

Figure 1. UART Coffee System Design


























Design & Implementation

Hardware Design

Block diagram

Figure 2. UART Coffee's block diagram

Hardware Pin Out

I/O Pin(s) Name
Step Motor 1 P0.29, P0.30 GPIO
Step Motor 2 P1.22, P1.23 GPIO
Cooling Fan P0.0 GPIO
Stirring Motor P0.1 GPIO
Figure 3. Full Circuit for the harware and SJ One Board

Hardware Interface

Hardware Used

  • Transistor (st953)
  • Resistors(10Ω and 100Ω)
  • 5v DC Motor
  • 12V Fan
  • 5v Step Motor
  • Water Valve
  • Bread Board
  • Jumper Cables


Interfacing
The coffee making machine uses UARTto establish communication between two microcontrollers using their Tx and Rx pins, more specifically UART2. The first SJSUOne board is used to control the motor to stir the coffee, step motor for coffee powder flow, and the cooling system. The second microcontroller is used to control the switches for user interaction and also to transmit temperature data to the first board. Since the boards can only supply 3.3V, a transistor connected to 5V was used so that the different I/O components can receive their appropriate voltage. The stepper motors have more wires than the regular DC motors, so more than one pin was needed to use them. The only non-electronic component of our design is the water valve, this is because of security measures.







Software Design

The software of this machine is designed to interact with the user so that the user's needs are met. The buttons on the board are programmed to control the options for coffee beans, temperature, and the mixing. During the UART transmission (9600bps), the transmitting board sends a 10-bit message to the receiving board that includes the user's choices. After receiving the message, the receiving boards takes over and begins the coffee mixing process.

Figure 4. UART Coffee State Diagram
















Implementation

Motors and Transistor Interface

Figure 5. Transistors and Motors connected.

Connecting Transitor to I/O component

  1. Connect power supply (5V) to bread board
  2. Emmitter is connected to resistor (100 Ohms)
  3. Resistor connects to board's GPIO pin
  4. Base pin Connected to component's ground
  5. Component's Vcc connected to power supply
  6. Collector pin goes to power supply's ground














Sytem Operation Procedure

  1. Press START Button on the the receiver board
  2. Transmitter board can select options (Temperature and Coffee type)
  3. User confirms options by pressing button 4, CONFIRM
  4. Transmitter board sends 10-bit message to receiver with all the options
  5. Receiver takes control of operations
  6. Starts pumping out selected coffee powder
  7. Sleeps for 10 seconds to wait for water to be pured in
  8. Activates stirring mechanism for 5 seconds
  9. Activated cooling system to achieve desired temperature
  10. Coffee is now READY

Testing & Technical Challenges

My Issue #1

Some of the GPIO Pins cannot support enough current or voltage for our I/O devices. For example, when wanting to control a motor by the board, we couldn't get it done by simply connecting directly to the board because the pin supplies 3.3V and 0.1A.

Solution: Connecting a transistor between the motor and the SJSUOne board allowed the board to have control over the device and activate it when needed.

My Issue #2

Our coffee machine encountered a problem when wanting the coffee powder to slide down to the cup. This did not let the powder get to the cup, so our design could not function correctly.

Solution: We tilted our design to a 45-degree angle to that our ramp is steep enough to get the coffee powder into the cup.

My Issue #3

We wanted to have a water control system so that our coffee machine can provide water. Adding liquids to the design can be dangerous because it can cause a short circuit and mess the entire project up.

Solution: We added a water valve to the opposite side of the circuit. This allowed enough space between any wire and the water.

Conclusion

The UART Coffee making machine was a learning experience for both of us. We learned to interface different components to the microcontroller even if the microcontroller's 3.3V was insufficient. The hardest part of this project was getting the UART communication between the two boards, however, working together made it easier because one partner was able to check the other person's work. A non-techincal hurdle we faced was timing because we both had different schedules due to finals, so working together was only possible after finals. Overall, we are pleased with our project's results and the knowledge we picked up and reinforced along the way.

Project Video

Project Source Code

Acknowledgement

We would like to thank Preet and Professor Ozemek for helping us throughout the class. Also, thank Kenneth and Amy for supporting us during the days that we worked on this project. Finally, we want to thank professor Harry Li for allowing us to use Engr 268 as a working space.

References Used

Appendix

Retrieved from "http://socialledge.com/sjsu/index.php?title=F16:_I2Coffee&oldid=35218"