F16: Autonomous Runaway Alarm Car - Revision history

146 user14: /* Stabilizing the Parts */

2016-12-27T07:22:39Z

‎Stabilizing the Parts

146 user14: /* Appendix */

2016-12-21T18:28:35Z

‎Appendix

146 user14: /* References Used */

2016-12-21T18:28:24Z

‎References Used

146 user14: /* LCD Display */

2016-12-21T18:27:43Z

‎LCD Display

146 user14: /* Limited Chassis Size */

2016-12-21T18:24:30Z

‎Limited Chassis Size

146 user14: /* Stabilizing The Parts */

2016-12-21T18:21:45Z

‎Stabilizing The Parts

146 user14: /* Stabilizing The Parts */

2016-12-21T18:21:15Z

‎Stabilizing The Parts

146 user14: /* LCD Display */

2016-12-21T18:17:23Z

‎LCD Display

146 user14: /* Implementation */

2016-12-21T18:06:28Z

‎Implementation

146 user14: /* Software Design */

2016-12-21T18:06:24Z

‎Software Design

@@ Line 391: / Line 391: @@
 *Problem
-Since the car is moving, there is a chance that parts such as the sensors, SJOne Board, battery sources, and breadboards. Unless those parts were stabilized, there is a good chance that some parts could fall off the car and disconnect some pieces of the circuit. This issue is also bad since forceful removal of pieces could damage the pins and parts used during testing. It would also negatively affect the functionalities of the car since the IR sensors need to be stable in order to have the car avoid the obstacles.
+Since the car is moving, there is a chance that parts such as the sensors, SJOne Board, battery sources, and breadboards could fall off of the chassis. Unless those parts were stabilized, there is a good chance that some parts could fall off the car and disconnect some pieces of the circuit. This issue is also bad since forceful removal of pieces could damage the pins and parts used during testing. It would also negatively affect the functionalities of the car since the IR sensors need to be stable in order to have the car avoid the obstacles.
 *Solution

← Older revision		Revision as of 18:28, 21 December 2016
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	* [http://blog.pennybuying.com/down/f/F815A.pdf L298N Dual H-Bridge Motor Driver User's Guide]		* [http://blog.pennybuying.com/down/f/F815A.pdf L298N Dual H-Bridge Motor Driver User's Guide]
	* [http://www.socialledge.com/sjsu/index.php?title=Main_Page SJOne Board]		* [http://www.socialledge.com/sjsu/index.php?title=Main_Page SJOne Board]
−
−	~~=== Appendix ===~~
−	~~You can list the references you used.~~

@@ Line 433: / Line 433: @@
 * Praveen Prabhakaran
-=== References Used ===
+=== Appendix ===
 '''Datasheets'''
 * [https://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf L298N H-Bridge]

@@ Line 384: / Line 384: @@
 *Solution
-As a workaround to this issue and to retain the alarm clock-like functionalities of the project, we decided to use the onboard 7-segment display and LEDs to indicate the amount of time left before the alarm goes off. The 7-segment display represents the amount of minutes and the LEDs give an indication of the number of seconds before the alarm goes off. Within the final minute of the countdown before the alarm, the 7-segment display will show the time remaining before the alarm goes off and the car starts moving.
+As a workaround to this issue and to retain the alarm clock-like functionalities of the project, we decided to use the onboard 7-segment display and LEDs to indicate the amount of time left before the alarm goes off. The 7-segment display represents the amount of minutes and the LEDs give an indication of the number of seconds before the alarm goes off. Within the final minute of the countdown before the alarm, the 7-segment display will show the time remaining in seconds before the alarm goes off and the car starts moving.
 The workaround involves two tasks: one to set the timer and the other to count down to 0. In the timer set task, the user uses Switches 0 and 1 to set the time needed to elapse for the alarm to go off. Switch 0 increments the timer to 1 minute while Switch 1 resets the timer in case the user goes too far. When the user has the desired time set, Switch 2 is pressed which allows the RTOS to context switch to the countdown.

@@ Line 402: / Line 402: @@
 *Solution
-The solution was to make use of both layers of the chassis. In the bottom layer, the AA Battery holder and power bank were placed to save space on the top layer. Since both of these connections to the boards on the top layer were simple, they were placed on the bottom with their respective wires going through the slit on the top layer to easily power up the devices. The IR sensors were also placed on the bottom layer to save space up front on the car. The breadboards were placed towards the back with the SJ One board resting on top and in the middle. While this uses up some breadboard space, it leaves enough space for all of the connections to be made. With enough space, the H Bridge was placed towards the front of the chassis to easily connect to the motors, SJ One Board, and battery pack.
+The solution was to make use of both layers of the chassis. In the bottom layer, the AA Battery holder and power bank were placed to save space on the top layer. Since both of these connections to the boards on the top layer were simple, they were placed on the bottom with their respective wires going through the slit on the top layer to easily power up the devices. The IR sensors were also placed on the bottom layer to save space up front on the car. The breadboards were placed towards the back with the SJOne board resting on top and in the middle. While this uses up some breadboard space, it leaves enough space for all of the connections to be made. With enough space, the H-bridge was placed towards the front of the chassis to easily connect to the motors, to the SJOne Board, and to the battery pack.
 === DC Motors ===

@@ Line 388: / Line 388: @@
 The workaround involves two tasks: one to set the timer and the other to count down to 0. In the timer set task, the user uses Switches 0 and 1 to set the time needed to elapse for the alarm to go off. Switch 0 increments the timer to 1 minute while Switch 1 resets the timer in case the user goes too far. When the user has the desired time set, Switch 2 is pressed which allows the RTOS to context switch to the countdown.
-=== Stabilizing The Parts ===
+=== Stabilizing the Parts ===
 *Problem

@@ Line 366: / Line 366: @@
 === Implementation ===
-*IR Sensor to the SJOne board
+*IR sensor to the SJOne board
 **The pins connecting to the sensor are configured to use their ADC functionality.
 **The IR sensors repeatedly send information to the SJOne board.

← Older revision		Revision as of 18:06, 21 December 2016
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	[[File:CmpE146 F16 T10 ASMChart.png \|frame \| center\| <center> '''Figure 9. Algorithmic State Machine Chart '''</center>]]		[[File:CmpE146 F16 T10 ASMChart.png \|frame \| center\| <center> '''Figure 9. Algorithmic State Machine Chart '''</center>]]

−	The whole project has three main phases: the timer set, the countdown, and the alarm phase. State 0 takes place during the timer set phase and the system will stay in that phase until the alarm set button has been pressed. When that button is pressed, the countdown phase begins. This is represented in State 1. The value built up during the previous phase is then count down every second. The system stays in this phase until the counter hits zero when the alarm phase begins. The alarm phase encompasses States 2, 3, and 4 of the ASM~~. It~~ covers the steering of the car and the buzzer going off. The alarm car stays in this phase until the stop button is pressed. At that point, the car stops and the alarm is complete. These phases act like a waterfall progression in that the next phase does not start until the previous one finishes and that once a phase finishes, the system will not go back to it.	+	The whole project has three main phases: the timer set, the countdown, and the alarm phase. State 0 takes place during the timer set phase and the system will stay in that phase until the alarm set button has been pressed. When that button is pressed, the countdown phase begins. This is represented in State 1. The value built up during the previous phase is then count down every second. The system stays in this phase until the counter hits zero when the alarm phase begins. The alarm phase encompasses States 2, 3, and 4 of the ASM which covers the steering of the car and the buzzer going off. The alarm car stays in this phase until the stop button is pressed. At that point, the car stops and the alarm is complete. These phases act like a waterfall progression in that the next phase does not start until the previous one finishes and that once a phase finishes, the system will not go back to it.