Difference between revisions of "S18: Team Nemesis(SJSU Cam)"

Revision as of 21:08, 23 May 2018

Grading Criteria

SJSU Cam

Abstract

Our project is a digital camera implemented using the SJONE board. An image is captured using a camera and is then displayed on an LCD screen. An SD card is also used to store the output of the camera as the captured image. For navigating through various options on the LCD screen, a menu is created.

The camera is mounted on a 3D printed box which contains an LCD screen behind to display the image being captured by the camera.

Objectives & Introduction

The objective for this project was to learn how timing and buffer play an important role in capturing the pixels from the camera and displaying them on the LCD screen. The following objectives were set for the project:
1. Write a driver for camera (mention what kind of camera ), which has a better rate of capturing the image with the SJONE board and integrate it.
2. Store the output of the camera to SD card.
2. Write the driver for LCD (mention the name) and integrate it by choosing the right resolution.
3. Have a menu implemented for the options available on the digital camera.

Team Members & Responsibilities

• Chhavi Mehta
  • Camera Module Driver
• Deeksha Prakash Kankalale
  • PCB Design, Camera driver interfacing.
• Parth Gujar
  • LCD Module Driver, 3D design.
• Sagar Kalathia
  • LCD Module interfacing, implementing graphics library
• Saurabh Badenkal
  • LCD Driver, Integration of camera and LCD on the PCB and data pipelining.

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.

Parts List & Cost

Design & Implementation

This design section outlines the hardware and software design of the project.

Hardware Design

The two main hardware components used in the project are discussed in detail below.

LCD Screen:

Camera:

Camera Module Block Diagram :

<System block diagram>

Hardware Interface

describe the buses and drivers in detail

Schematic:

PCB 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 general flow of our project can be explained by the flowchart shown below:

Implementation

The camera is interfaced to the board through SPI communication protocol. The raw pixels are read from the camera to the SJONE board. There are five buttons on the camera. One of them used to capture an image and store it on the SD card. The LCD screen is interfaced again through SPI communication protocol. The raw pixels received from the camera are displayed on to the LCD screen.

MENU for the LCD

A menu was designed for the LCD screen using an LCD_MENU class. This class included functions like adding sub-menu, displaying them or loading previous ones. It helped in dynamically adding options for the innumerous camera settings like changing image resolution and format.The private members of this class are as shown:

   private:
   type myType;                         //to know if current object is itemType or menuType
   str myName;                          //name of this object
   LCD_MENU *ParentMenu;                //parent menu of current menu object
   LCD_MENU *CurrentMenu;               //reference to global CurrentMenuG
   VECTOR<Element> all_elements;        //to store all elements by Element .name .id and .type
   VECTOR<str> all_elements_name;       //to store all elements by name to use by Find function
   int highlighted;                     //to track currently highlighted sub-element

Similar to the this class, a file_explorer class was implemented for navigating through the SD card files.

Testing & Technical Challenges

Problem 1: Making any camera work on SJOne can be little tricky. We found SJOne to be not so compatible with camera modules and have timing issue which leads to displaced images or sometimes no image at all. Solution: After trying a number of cameras like OV7670 without fifo and VC0706 serial camera, we were able to solve the problem by using OV2640 camera with fifo which made capturing the image easier because the buffer saved the values rendering the timing issues.

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?

Project Video

Upload a video of your project and post the link here.

Project Source Code

• Sourceforge Source Code Link

References

Acknowledgement

We would like to thank our professor, Preetpal Kang for designing such a course where learning was his guidance and consistent feedback. We would also like to thank the ISA team for their valuable inputs as per their own experience of the course when taken and their support and motivation at every phase of this project. There were some unsung, selfless classmates who helped us whenever necessary, whenever any immediate hardware was required or any other guidance needed in spite of being from the rival teams. We would like to thank each one of them who forgot their differences or considered the course and project as a competition to selflessly help us when in need.

References Used

[1] Preetpal Kang's lecture notes of CMPE 244, Computer Engineering, San Jose State University, Jan-May 2018.

Appendix

You can list the references you used.