ECET 340

Devry University - ECET 340: LAB#2 Keypad-LCD PROGRAMMING KEYPAD ON TWR-DEV-PERIPH. do{ mSDelay(15); PORTA = PORTA | 0x0F; //COLUMNS SET HIGH row = PORTA & 0xF0; //READ ROWS }while(row != 0x00); //MAKE SURE BUTTON IS NOT STILL HELD } //CLOSE WHILE(1) } //CLOSE MAIN /**********************SUBROUTINES***********/ void mSDelay(unsigned int itime){ unsigned int i; unsigned int j; for(i=0;i<itime;i++) for(j=0;j<1000;j++); } Lab Manual for “HCS12 Microcontroller and Embedded S...

Devry University - ECET 340: Quiz 1. Questions and Answers. Question 1 5 / 5 pts (TCO 1) A 4 x 5 keypad consists of four columns and five rows. 9 SPST switches. 20 SPST Normally Closed switches. Correct! four rows and five columns. ECET340 Week 1 lecture on keypad Question 2 0 / 5 pts (TCO 1) Which of the following is not an advantage of an LCD compared to an LED display? Ease of programming Correct Answer Limited to display numbers and a few characters You Answered Ability to...

Devry University - ECET 340: Final Review. Questions and Answers. Question : (TCO 1) A 4 x 5 keypad consists of Student Answer: 4 columns and 5 rows. 9 SPST switches. 20 SPST Normally Closed switches. Question 2 . Question : (TCO 1) The first command in the LCD initialization sequence is Student Answer: Data = 0x30, CSB = 0, E = ↓, RS = 1, R/W~ = 0. Data = 0x30, CSB = 0, E = ↓, RS = 0, R/W~ = 1. Data = 0...

Devry University - ECET 340: Quizzes 1 - 5. Questions and Answers. 1. Question : (TCO 1) In a typical keypad switch, bouncing occurs for how long? Student Answer: 5 to 20 ns 5 to 20 μs 5 to 20 ms 5 to 20 s Instructor Explanation: ECET340 Week 1 lecture on keypad Points Received: 5 of 5 Comments: Question 2 . Question : (TCO 1) After voltage is applied to an LCD element, what must be done first? Student Answer: Initialize the LCD Blank the LCD display Send a message to the L...

Objectives: 1.To become familiar with the configuring and enabling of interrupts 2.Using the external interrupt 3.Using the Real Time Interrupt 4.To combine two interrupts within a program What distinguishes an external interrupt from an RTI interrupt? Describe what transpires when an interrupt occurs? What is an interrupt service routine? What benefit does the ISR have over standard polling code? Discuss challenges experienced in developing the dual interrupt software code.

Week 4 Homework Assignment Page 324, problems 46, 48 Page 467, review questions 1–4 Page 469, problems 55–60 Pg 324 46) For the PAC1 counter, which pin is used for the input pulse? 48) Program PACA to be an event counter. Use 16-bit mode, and display the binary count on PORTB and PORTA continuously. Set the initial count to 20,000. Pg 467 1) In a DAC, input is _ (digital, analog) and output is (digital, analog). 2) In an ADC, input is _ (digital, analog) and output is (digital, analog). 3...