S15: Touch Navigator
Contents
Grading Criteria
- How well is Software & Hardware Design described?
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- Code Quality
- Overall Report Quality:
- Software Block Diagrams
- Hardware Block Diagrams
- Schematic Quality
- Quality of technical challenges and solutions adopted.
Project Title
Abstract
The purpose of this project is to implement a robot car which will follow the path drawn on the touch screen.
Objectives & Introduction
- The prime objective of this project is traversing a robotic car autonomously through specific map or grid,depending upon the points drawn on the touchscreen.SJ-ONE board is used giving control signals to motor driver IC and communication between user interface and car. communication between 2 boards is implemented by Embedded baseband wireless protocol using a on-board NORDIC wireless chip .Obstacle sensors are used to detect obstacles and avoid collision.
- Focus of project was to make an Real-time system/application using touchscreen and SJ-ONE development board which could guide and navigate a vehicle through a specific or predefined area.
Team Members & Responsibilities
- Athavan Kanagasabapathy
- James Sushanth Anandraj
- Ravikumar Vanjara
- Rishit Borad
Schedule
| Week | Start Date | End Date | Task | Status | Actual Completion Date |
|---|---|---|---|---|---|
| 1 | 4/7/2015 | 4/21/2015 | Developing Android Application to communicate to SJOne board over UART | Completed Successfully | 4/19/2015 |
| 2 | 4/14/2015 | 4/21/2015 | Interfacing the motor with the SJOne and controlling the direction and speed. | Completed Successfully | 4/21/2015 |
| 3 | 4/21/2015 | 4/28/2015 | Writing application in android to draw paths. | Completed Successfully | 4/30/2015 |
| 4 | 5/09/2015 | 5/11/2015 | Interfacing with the obstruction sensors. | Completed Successfully | 5/11/2015 |
| 5 | 4/29/2015 | 5/4/2015 | Mapping traversal area/co-ordinates on the android application. | In Progress | In Progress |
| 6 | 5/11/2015 | 5/--/2015 | Integrating the Obstruction detection in main application. | In Progress | In Progress |
| 7 | 5/18/2015 | 5/--/2015 | Testing | In Progress | In Progress |
Part List
| Sr.No. | Parts | Cost | Useful part links/Datasheets |
|---|---|---|---|
| 1 | Dual H-Bridge Motor Driver for DC Motor L293D | 2.5 $ | ST microelectronics Datasheet |
| 2 | Car chassis parts - Wheels, shaft, DC motors(2), body | 12.0 $ | RC Car |
| 3 | Batteries/ Power source | 5.0 $ | Power Bank |
| 4 | IR Leds and IR sensor (TSOP38238) | 10.0 $ | IR sensor Datasheet |
| 5 | Antennas for Nordic communication | 4.0 $ | Router antennas |
Design & Implementation
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Hardware Design
Block Diagram
Hardware Interface
- SJone Board
The SJ-One Board consists of LPC1758 microcontroller which belongs to the family of ARM Cortex-M3. It operates upto 100MHz clock frequency. ARM Cortex-M3 has a built-in Nested Vectored Interrupt Controller(NVIC) which can support 35 vectored interrupts. It has 512 KB of on-chip flash memory,64Kb on-chip SRAM. The SJ-One board also has a built-in Nordic Wirless device embed on it namely "nRF24L01P", which is used as wireless communication from one board to another board. The board has many accelerated GPIO pins and each of the port pins can be controlled as I/O individually.
- Nordic wireless
The nRF24L01P is a single chip 2.4GHz transceiver with an embedded baseband protocol engine (Enhanced ShockBurst™), suitable for ultra low power wireless applications. This Nordic wireless device operates at the ISM frequency at the range 2.4 to 2.4835GHz. The design interface between the Nordic wireless device and SJ-One board was established through a Serial Peripheral Interface (SPI) bus. The register map, which is available through the SPI, contains all setup enrolls in the nRF24L01+ and is open in all operation methods of the chip. The wirless communication done by packet-based messgae communication. Internal FIFOs ensure a smooth data flow between the radio front end and the system’s MCU. The radio front end uses GFSK modulation. It has user configurable parameters like frequency channel, output power and air data rate. nRF24L01+ supports an air data rate of 250 kbps, 1 Mbps and 2Mbps. The two power saving modes make the nRF24L01+ very suitable for ultra low power designs.
- Motor driver
- Android application
Software Design
Implementation
State Machine
Testing & Technical Challenges
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My Issue #1
Discuss the issue and resolution.
Conclusion
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Project Video
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Project Source Code
References
Acknowledgement
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References Used
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Appendix
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