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ECET 340 HELP Learn by Doing

ECET 340 Entire Course (All ilabs and Homework) (Devry)

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ECET 340 Week 1 HomeWork 1ECET 340 Week 1 iLab 1ECET 340 Week 2 HomeWork 2ECET 340 Week 2 iLab 2ECET 340 Week 3 HomeWork 3ECET 340 Week 3 iLab 3ECET 340 Week 4 HomeWork 4

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ECET 340 Week 1 HomeWork 1 (Devry)


1. Give three examples each of internal and external peripheral devices as referenced to the HCS12 microcontroller and not an entire PC. (2 points)

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ECET 340 Week 1 iLab 1 (Devry)


OBJECTIVES:To become familiar with Microcontroller MC9S12 parallel ports and how simple input and output devices are interfaced through them.To learn how to program I/O instructions in C language.To learn how to organize a program to read data from input ports, process the data, and display the result on a simple output device.

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1. Where does program control transfer to when an interrupt occurs? +2 points2. Which one of the following Interrupts has highest priority? +2 points3. RAM Vector table addresses $3E52 belongs to which interrupt? +2 points4. Before exiting an ISR, the programmer should use which command? +2 points

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ECET 340 Week 2 iLab 2











1. Sketch a circuit that can be used to debounce a pushbutton and explain how it works. (4 points max)2. In Figure 7.32 on page 339 of the Huang textbook, if the row has and the columnsare , which key is pressed? (2 points max)











SOLVED ECET 340 iLAB3OBJECTIVES:To learn the basic operation of a keypad.To understand how to interface a keypad to a microprocessor.To learn how to program a keypad driver in C language.











1. Determine the conversion time for an ADC0804 (8-bit), where 66 clocks per bit are required, if its clock frequency is 50 kHz. 2. If an 8-bit SAR has Vref = 10 V, what is the binary value for an input voltage of 7.28 V?











I. OBJECTIVES:To learn how to use A-to-D converters to digitize signals from analog input devices.To learn how to write a C language program that samples the data from an analog device, digitizes it and formats it for output on an LCD.To become more proficient in programming displays for real-time operation.











1. Explain, briefly, why an analog restoring filter is sometimes used at the output of a DAC. 2. Given Iref = 2 mA for a DAC1408 IC, find Iout for the input 1110 1110 3. Find the number of discrete voltages output by a 12-bit DAC. Show work.











Scenario/SummaryThis week's lab covers two areas, conversion of digital HCS12signals to an analog format, and the use of a Serial Peripheral Interface (SPI)to transfer data, and commands between the HCS12, and the DACPeripheral.











1. What are the four main functions of the HC12 Timer unit? 2. Two input capture events occur at counts 0x1037 and 0xFF20 of the free-running counter. How many counts (in decimal) have transpired between these two events?























1. The movable part of the solenoid is the: +2 points2. Why is the 6N139 optoisolator used in the interfaces to devices such as large motors? +2 points3. Calculate the number of steps per revolution for a stepper motor with a step angle of 7.5°. +2 points4. How is stepper motor speed controlled? State any two ways a program can do this. +2 points




















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