Table of Contents

Corning Community College

ENGR1050 C for Engineers

PROJECT: Seeing The Light (STL2)

OBJECTIVE

Time to explore optimizing our logic further, through the use of a loop and demonstrating the effectiveness of our logic by scaling up the number of LEDs in our counter (to at least 8).

PROCESS

Do note, the productive way to go about this project involves taking the following steps:

If you start too late, and do not ask questions, and do not have enough time and don't know what is going on, you are not doing the project correctly.

TASK

After exploring, assembling, and testing the intended circuit (8+ LEDs), adapt the provided C code to use the bank of connected LEDs to count in binary from 00000000 to at least 11111111 (0 to 255).

Using the current value of count, your task is to make use of ONE if statement and copious use of bitwise logic to determine from an ongoing count the state of the individual bits.

It is your task to write a C program that interfaces successfully with the eight or more independently connected LED circuits, arranged in some orientation to ascertain an order or positioning, where your program will (in endless fashion, or until being manually interrupted) display a count (in binary) of values from 0 to at least 255 (then rollover, or reset).

If “1” means the LED in that position is ON, and “0” means the LED in that position is OFF, then you want to write a program that performs the following progression (over and over again): 

0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 1 0
0 0 0 0 0 0 1 1
0 0 0 0 0 1 0 0
0 0 0 0 0 1 0 1
0 0 0 0 0 1 1 0
0 0 0 0 0 1 1 1
0 0 0 0 1 0 0 0
. . .
1 1 1 1 1 0 0 1
1 1 1 1 1 0 1 0
1 1 1 1 1 0 1 1
1 1 1 1 1 1 0 0
1 1 1 1 1 1 0 1
1 1 1 1 1 1 1 0
1 1 1 1 1 1 1 1   <-- 255, the maximum value to display when there are 8 bits/LEDs
0 0 0 0 0 0 0 0   <-- 0, we "roll over" and start again
0 0 0 0 0 0 0 1
0 0 0 0 0 0 1 0
. . .

GRABIT

To assist with consistency across all implementations, data files for use with this project are available on lab46 via the grabit tool. Be sure to obtain it and ensure your implementation properly works with the provided data. 

lab46:~/src/SEMESTER/DESIG$ grabit DESIG PROJECT

Components and wiring

An example of one way to wire up the LED bar:

EDIT

You will want to go here to edit and fill in the various sections of the document:

STRATEGY

The general flow of the process (one way of going about it, anyway) can be described as follows: 

SET COUNTER TO ZERO
REPEAT INFINITELY:
    SET PLACE TO ONE
    REPEAT UNTIL PLACE IS GREATER THAN EIGHT:
        SHOULD THE PLACE POSITION HAVE A ONE:
            ACTIVATE THE PLACE’S LED
        OTHERWISE:
            DEACTIVATE THE PLACE’S LED

        LET PLACE BECOME THE NEXT PLACE POSITION
    KEEP GOING

    PAUSE FOR HUMAN PERCEPTION
    LET THE COUNTER BE INCREMENTED BY ONE
KEEP GOING

SUBMISSION

To be successful in this project, the following criteria (or their equivalent) must be met:

Submit Tool Usage

Let's say you have completed work on the project, and are ready to submit, you would do the following (assuming you have a program called uom0.c): 

lab46:~/src/SEMESTER/DESIG/PROJECT$ make submit

You should get some sort of confirmation indicating successful submission if all went according to plan. If not, check for typos and or locational mismatches.

RUBRIC

I'll be evaluating the project based on the following criteria: 

91:stl2:final tally of results (91/91)
*:stl2:used grabit to obtain project by the Sunday prior to duedate [13/13]
*:stl2:clean compile, no compiler messages [13/13]
*:stl2:program conforms to project specifications [13/13]
*:stl2:uses at least eight LEDs for the binary counter [13/13]
*:stl2:program uses only one selection structure in loop to do task [26/26]
*:stl2:code tracked in lab46 semester repo [13/13]

Pertaining to the collaborative authoring of project documentation

Additionally