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Diffstat (limited to 'proposal')
| -rw-r--r-- | proposal/diagram.fig | 120 | ||||
| -rw-r--r-- | proposal/proposal.tex | 63 |
2 files changed, 0 insertions, 183 deletions
diff --git a/proposal/diagram.fig b/proposal/diagram.fig deleted file mode 100644 index 0be7b07..0000000 --- a/proposal/diagram.fig +++ /dev/null @@ -1,120 +0,0 @@ -#FIG 3.2 Produced by xfig version 3.2.9a -#encoding: UTF-8 -Landscape -Center -Metric -A4 -300.00 -Single --2 -1200 2 -6 4725 1575 5940 2115 -6 4837 1665 5827 2025 -4 1 0 50 -1 0 12.00 0.0000 4 165 435 5332 1800 CAN\001 -4 1 0 50 -1 0 12.00 0.0000 4 165 945 5332 2010 Transceiver\001 --6 -2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 - 4725 1575 5917 1575 5917 2115 4725 2115 4725 1575 --6 -6 4725 2565 5940 3105 -6 4860 2655 5805 3015 -4 1 0 50 -1 0 12.00 0.0000 4 165 435 5332 2790 CAN\001 -4 1 0 50 -1 0 12.00 0.0000 4 165 840 5332 3000 Controller\001 --6 -2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 - 4725 2565 5917 2565 5917 3105 4725 3105 4725 2565 --6 -6 5265 2115 5355 2565 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 5310 2115 5310 2565 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 5355 2295 5265 2385 --6 -6 5265 3105 5355 3555 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 5310 3105 5310 3555 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 5355 3285 5265 3375 --6 -6 5265 3960 5355 4410 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 5310 3960 5310 4410 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 5355 4140 5265 4230 --6 -6 4905 4410 5670 4725 -2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 - 4905 4410 5670 4410 5670 4725 4905 4725 4905 4410 -4 0 0 50 -1 0 12.00 0.0000 4 165 570 4995 4635 PROM\001 --6 -6 4635 3555 6075 3960 -2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 - 4635 3555 6075 3555 6075 3960 4635 3960 4635 3555 -4 0 0 50 -1 0 12.00 0.0000 4 165 1290 4725 3825 Microcontroller\001 --6 -6 3600 3262 4230 3577 -2 2 0 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 5 - 3600 3262 4230 3262 4230 3577 3600 3577 3600 3262 -4 0 0 50 -1 0 12.00 0.0000 4 165 435 3690 3487 DAC\001 --6 -6 1665 1665 2430 2565 -6 1755 1665 2340 2070 -2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 - 1755 1665 2340 1665 2340 2070 1755 2070 1755 1665 -4 0 0 50 -1 0 12.00 0.0000 4 165 405 1845 1935 ECU\001 --6 -6 1665 2250 2430 2565 -2 2 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 5 - 1665 2250 2430 2250 2430 2565 1665 2565 1665 2250 -4 0 0 50 -1 0 12.00 0.0000 4 165 615 1710 2475 Sensors\001 --6 -2 1 0 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 2 - 2025 2070 2025 2250 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 2070 2115 1980 2205 --6 -6 1710 3105 2340 4410 -6 1710 3780 2340 4410 -1 3 0 1 0 7 50 -1 -1 4.000 1 0.0000 2025 4095 302 302 2025 4095 2160 4365 -4 0 0 50 -1 0 12.00 0.0000 4 165 540 1755 4140 Gauge\001 --6 -6 1710 3105 2340 3735 -1 3 0 1 0 7 50 -1 -1 4.000 1 0.0000 2025 3420 302 302 2025 3420 2160 3690 -4 0 0 50 -1 0 12.00 0.0000 4 165 540 1755 3465 Gauge\001 --6 --6 -6 2475 3240 2745 4005 -6 2475 3240 2745 3330 -3 2 0 1 0 7 50 -1 -1 4.000 0 0 0 4 - 2475 3330 2565 3240 2655 3330 2745 3240 - 0.000 -0.500 -0.500 0.000 --6 -6 2475 3915 2745 4005 -2 1 0 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 7 - 2475 4005 2475 3915 2565 3915 2565 4005 2655 4005 2655 3915 - 2745 3915 --6 --6 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 6075 3780 6705 3780 -2 1 0 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 4 - 4635 3645 4455 3645 4455 3420 4230 3420 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 4410 3375 4320 3465 -2 1 0 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 2 - 3600 3420 2340 3420 -2 1 0 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 4 - 4635 3870 4455 3870 4455 4095 2340 4095 -2 2 1 1 0 7 50 -1 -1 4.000 0 0 -1 0 0 5 - 3510 1485 6210 1485 6210 4815 3510 4815 3510 1485 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 2340 1845 4725 1845 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 3150 1800 3060 1890 -2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2 - 6525 3735 6435 3825 -4 1 0 50 -1 0 12.00 0.0000 4 165 795 3060 1710 CAN Bus\001 -4 0 0 50 -1 0 12.00 0.0000 4 165 270 5400 3375 SPI\001 -4 0 0 50 -1 0 12.00 0.0000 4 165 270 5400 4230 SPI\001 -4 0 0 50 -1 0 12.00 0.0000 4 165 390 6300 3690 USB\001 -4 0 0 50 -1 0 12.00 0.0000 4 165 270 4320 3330 SPI\001 diff --git a/proposal/proposal.tex b/proposal/proposal.tex deleted file mode 100644 index 00aca85..0000000 --- a/proposal/proposal.tex +++ /dev/null @@ -1,63 +0,0 @@ -\documentclass{article} -\usepackage{graphicx} - -\title{ -Analog Gauge Driver with CAN Interface \\ -\large COMP490 Project Proposal -} -\author{ -Sam Anthony 40271987 \\ -sam@samanthony.xyz \\ s\_a365@concordia.ca -\and -Hovhannes Harutyunyan, PhD \\ -Department of Computer Science and Software Engineering \\ -haruty@encs.concordia.ca -\and -Concordia University \\ -} - -\begin{document} - -\maketitle - -Installing aftermarket gauges in a car typically requires installing sensors as well. -However, such sensors are often already present, and are used by the ECU (engine control unit). -Thus, the installation of aftermarket gauges can result in duplicate sensors which add complexity without augmenting the functionality or reliability of the vehicle. -Sensors installed like this are not redundant. -In fact, they reduce reliability, because each is a single point of failure. - -The proposed device allows gauges to use the sensors already on the car. -It retrieves sensor data from the ECU via the CAN bus (controller area network bus) and transforms the data into a format that the gauges can understand: a 0--5V analog signal in the case of a temperature or pressure gauge, or a square wave in the case of a tachometer or speedometer. - -The device is an embedded system comprising a microcontroller, a CAN controller and transceiver, several DACs (digital-to-analog converters), and PROM (programmable read-only memory). -The CAN interface is used for retrieving data from the ECU via the bus. -The DACs drive analog signals to the temperature and/or pressure gauges. -The microcontroller has an integrated PWM peripheral for driving a square wave to the tachometer and/or speedometer. -The PROM stores the calibration: a table that maps CAN data values to voltages or frequencies. -The microcontroller has a USB interface for programming the PROM from a computer. - -\begin{figure} - \includegraphics[width=\textwidth]{diagram.png} - \caption{System diagram} -\end{figure} - -The project has three parts: hardware design, software development, and testing. -The hardware and software development can be carried out concurrently. -Testing is the final step. - -Hardware design involves selecting ICs (integrated circuits), creating a circuit schematic, and designing a PCB (printed circuit board). -Once the board design is finalized, it can be sent for manufacturing. - -Two pieces of software must be written. -The first runs on the microcontroller. -Essentially, it must communicate with the various peripherals by transforming and transferring data between them. -It must fetch frames from the CAN controller and decipher them. -The CAN data are used to lookup the output value in the ROM. -Either the PWM peripheral or a DAC is used to send the appropriate signal to the gauge. -The microcontroller uses SPI (serial peripheral interface) to communicate with the peripherals. - -The second piece of software runs on the user's computer. -It programs the PROM with calibration data. -It communicates with the microcontroller using a simple text-based protocol over USB. - -\end{document} |