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1. Produce a short report typically about four sides of A4 containing an outline of the hardware components and configuration of your shock sensor system the software design and a brief description of the operation of the smart meter The complete C listing of your program should be added to the report as an appendix exclude any software routines provided by the lecturer The report must clearly show how the values for your timing have been derived This should indicate the timer used the prescaler value and the timer period The report should briefly discuss the use of interrupts in your program the interrupt vector used by your timer and the priority level 7 Demonstration The submitted program must be demonstrated to the lecturer During the demonstration you will be questioned about the operation of your implementation Demonstrations will typically be during the laboratory session of the final week No demonstration No marks 8 You will be asked to give detailed explanation of your code during the demonstration If you are unable to answer fundamental questions on sections of your own code they will not be counted in the assessment process A Holloway 4 March 2012 V1 0 Unit Assessment Criteria 16 7210 00 Indicative Feature Fail 0 39 3rd 40 49 2 ii 50 59 2 i 60 69 1st 70 Weighting F E D C B A Use of software Unable to use the Able to use a Use softwar
2. This may require you to form a new overall approach to the problem and restructure your code 13 Add USB functionality to your system replacing the data transfer of the UART 14 Add your own innovative features Notes The measurement of elapsed time must make use of one of the timers of the LPC2368 and must use the timer to generate periodic interrupts By counting the interrupts the passing of time can be measured For example if a timer was initialised to generate an interrupt every 100ms and at every interrupt a variable was incremented then when the variable reached 10 this would indicated that one second had passed A Holloway March 2012 V1 0 16 7210 00 In order to develop a working prototype and to evaluate the possibilities of the shock monitoring system the following are available The Keil MCB2300 development board with various I O devices such as LCD LED s Push Buttons potentiometer Buzzer etc Microchip I2C and SPI evaluation boards with a range of peripherals The Keil MDK ARM compiler The Keil RL ARM libraries The uVision3 Development environment and simulator LCD module This module has a 2 line 16 character line display A library of functions and examples is available from the lecturer to allow easy use of the LCD Other C libraries available are functions to read the ADC channels output to the DAC Serial I O etc Useful Information The following is a brief list of some of the LPC2368 amp I O
3. ADC producing 1024 possible digital values in the range 0 to 1023 Your program should read the ADC at periodic time intervals using a hardware Timer and convert the digital value into its equivalent acceleration in g using the information provided above The measured acceleration level should be continuously displayed on the LCD as a numerical value and as a moving bar graph see figure below as an example You may be required to make your own LCD characters to achieve a reasonable resolution of the bar graph display Note You may wish to use a Real Time Operating System RTOS for the final implementation of the shock sensor system and therefore should consider your overall approach and structure your code accordingly s hio c k DQ ND 5 AIII Basic Features 40 50 1 Risk of damage is significant if the g force peaks above 12g If the sensor reads three or more samples with a level above 12g within a consecutive 5 second period the LED s should flash warning of possible of injury You should choose a suitable sampling frequency for the application A Holloway 1 March 2012 V1 0 2 16 7210 00 Store the sampled data over a set period of time and or number of samples into an array for analysis at a later time At the end of the set time period or end sample number the values should be output to the UART for display on a PC Note A working solution incorporating featur
4. Application board features e NXP LPC2368 Microcontroller ARM7TDMI S based high performance 32 bit RISC Microcontroller e 58 Kbytes of high speed on chip RAM e 512KBytes of external program memory Flash ROM with In System Programming ISP and In Application Programming IAP Four 32 bit counter timers TO T3 see LPC23xx user manual for details Several digital I O ports connected to 8 LED s A 16 character x 2 line LCD 6 channel 10 bit ADC One potentiometer generating voltages in the range 0 to 3 3 volts is connected to analogue channel 0 10 bit DAC Output may be connected to the speaker on the Keil board via a jumper Four UARTs with 2 directly accessible on the Keil demo board COMO amp COM1 This could be used to output data CAN 2 0B with two channels CAN1 amp CAN2 Ethernet 10 100 MAC with DMA Three 12C serial interfaces Three SPI SSP serial interfaces 12S interface SD MMC memory card interface Real Time Clock with optional battery backup PWM unit for three phase motor control USB 2 0 Full Speed Device Controller Note To enable some of the features on the board it may be necessary to configure the jumpers Details of the jumper settings are given in the table below USB OTG 16x2LCD Panel SD Connector MCB2300 Jumper settings J1 USB D ON Connects USB Line D to the USB connector USB Device Power J2 USB D ON Connects USB Line D to the USB c
5. 16 7210 00 Assignment Development of a data capture and logging system to measure shock acceleration in athletes Individual assignment with 40 weighting Deadlines Report TBA Demonstrations To take place in your normal laboratory period of the week commencing TBA Objective Development of a data capture and logging system to measure shock acceleration in athletes using the MCB2300 development boards and associated peripheral boards The Basic System Runners exert large shock forces acceleration deceleration g forces on specific bones such as the tibia shin bone on every stride impact with the ground Repeated shock above specific thresholds can lead to permanent injury and often goes unnoticed by the athlete until the damage has already been inflicted A preventative system is therefore required to monitor log and alert the athlete if levels of shock above the safe thresholds are experienced The shock force on the will be measured using a single axis accelerometer ADXL78 which produces a voltage output proportional to the g value The output from the sensor driver electronics is an analogue signal in the range of 0 to 3 3 volts which corresponds to a measured value of 35g To simulate the sensor output the potentiometer on the Keil boards produces a voltage in the range 0 to approx 3 3 volts which is input to the microcontroller through an analogue to digital converter ADC The ADC of the NXP LPC2368 is a 10 bit
6. e tools Use of software tools Able to discriminate development basic subset of the limited subset of including some including advanced select and use more 10 and debugging software tools the software tools advanced tool features tool features advanced tools development tools Report Unable to use Satisfactory use of Competent use of C Competent use of C Competent use of C Program design standard C language C language in language in embedded language in embedded language in 10 and structure appropriately embedded systems systems systems and use of embedded systems compiler features and use of compiler features Report Little or no useful Adequate Appropriate Detailed Professional Program layout user documentation documentation documentation and documentation and documentation and 10 and and poor program and format layout format layout of format layout of format layout of documentation format layout of program program program program Report Little or no Use of appropriate Use of polling Competent use of Innovative use of Input amp output competence at using techniques for I O techniques with some polling and interrupts polling and interrupt 10 programming simple polling interfacing use of interrupts for for I O interfacing driven programming methodologies techniques for I O VO interfacing techniques interfacing Working state Little or no evidence Program performs Program performs Program perf
7. es 1 amp 2 will achieve a pass 40 50 Additional Features 50 70 Te 8 9 Implement a system to measure the cadence steps per minute of the athlete If the data is stored in an array located RAM memory default option when arrays are created the logged data will be lost when power is removed from the chip Store the data in non volatile memory such as the internal flash or an external EEPROM connected to the microcontroller using the I2C or SPI bus Ask the lecturer for more information on the external peripherals which may be accessed through the I2C or SPI bus Increase the resolution of the system by using one of the external high resolution ADC s available on the I2C and SPI peripheral boards Add user configurable parameters such as setting the sample period number of samples to be taken or changing the g force warning levels These could be set using HyperTerminal and the serial UART connection of the MCB2300 Implement an instantaneous increase but gradual decay of the bar graph on LCD Use the Real Time Clock RTC to timestamp the logged data Use the DAC and connected speaker to emit a 1 kHz test tone if the INTO button is held down for more than 3 seconds Advanced Features 70 10 Store the logged data to the SD card for analysis on a PC 11 Use the CAN bus to connect multiple senor nodes 12 Use of the RL ARM Real Time Operating System RTOS to coordinate the operation flow of your program
8. onnector USB Host ern JTAG J3 AOUT ON Connects AOUT via LF amplifier to the loudspeaker Ethernet s a 34 Not used J5 UMODE ON Allows soft connect of the USB device by issuing a software restart via P0 14 CAN2 COMO 36 ADO O ON Connects POT1 potentiometer to AINO for analog input demonstration J8 INTO ON Enable INTO Push Button J9 RST ON Enables Reset via COMO CAN1 COM1 J10 ISP OFF Disables In System Programming via COMO J11 LED ON Enables Port2 0 Port2 7 LEDs J13 ETM ON Enables the Embedded Trace Macrocell so that the USB soft Speaker PortLEDs LPC2388 Potentiometer INTO amp connect and the LED s can be used or variant R Buttons A Holloway 3 March 2012 V1 0 16 7210 00 Assessment method 1 You must attend laboratory sessions in order that your progress can be monitored at each stage of the design Attendance will be monitored 2 You will be asked to show program design and program code and where possible demonstrate partial solutions 3 Your design should be documented and any C code you write should be well structured and conform to a standard layout with appropriate use of comments 4 Note if you do not attend laboratories and suddenly turn up at the end with a working program you will not be credited with the work The various stages of development must be monitored 5 All students must submit a report and program listing with their name and student ID on both 6 The Report
9. orms all Program performs all and innovative of a working system minimum system most of the system system requirements system requirements 60 features requirements requirements and system extended in an appropriate and innovative direction A Holloway 5 March 2012 V1 0

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