Charles Tritt / Mbed OS 21_7segmentTest2_v5

Modified, multi-file version of my orginal 7-segment test program.

main.cpp@112:2af5a1ac47d5, 2021-11-10 (annotated)

Committer:
CSTritt
Date:
Wed Nov 10 14:51:10 2021 +0000
Revision:
112:2af5a1ac47d5
Parent:
111:47b0267b8dd4 
Modified multi-file version of my original 7-segment test program.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
CSTritt 107:61b9c99a4e27 1 /*
CSTritt 112:2af5a1ac47d5 2 Project: 21_7segmentTest2_v5 (Lab Wk 10)
CSTritt 112:2af5a1ac47d5 3 File: main.cpp (v. 1.0)
CSTritt 112:2af5a1ac47d5 4
CSTritt 112:2af5a1ac47d5 5 This is a modified, multi-file version of my original 7-segment display
CSTritt 112:2af5a1ac47d5 6 test program.
CSTritt 108:eee3167b25b4 7
CSTritt 111:47b0267b8dd4 8 This test program confirms hardware operation and demonstrates use of the
CSTritt 111:47b0267b8dd4 9 7-segement display. It will also be used as the starting point for the
CSTritt 111:47b0267b8dd4 10 Week 10 lab practical.
CSTritt 111:47b0267b8dd4 11
CSTritt 111:47b0267b8dd4 12 Display "value" from 0 to F_16 to DP (16_10) to all off (17_10) to all on
CSTritt 111:47b0267b8dd4 13 (17_10) on 7-segment display.
CSTritt 108:eee3167b25b4 14
CSTritt 111:47b0267b8dd4 15 Note: This display function takes an integer argument to be display and a
CSTritt 111:47b0267b8dd4 16 BusOut object (passed by reference) on which to display it as arguments.
CSTritt 111:47b0267b8dd4 17 This differs from the Week 8 Lab display function.
CSTritt 111:47b0267b8dd4 18
CSTritt 108:eee3167b25b4 19 Written by: Dr. C. S. Tritt
CSTritt 111:47b0267b8dd4 20 Created: 11/9/21 (v. 1.0)
CSTritt 107:61b9c99a4e27 21 */
Jonathan Austin 0:2757d7abb7d9 22 #include "mbed.h"
CSTritt 112:2af5a1ac47d5 23 #include "display.h"
CSTritt 111:47b0267b8dd4 24
CSTritt 111:47b0267b8dd4 25 const int SLP_TIME = 1000; // Update once per second.
CSTritt 108:eee3167b25b4 26
CSTritt 111:47b0267b8dd4 27 int main(void)
CSTritt 111:47b0267b8dd4 28 {
CSTritt 112:2af5a1ac47d5 29 Serial pc(USBTX, NC, 9600); // Use for debugging.
CSTritt 111:47b0267b8dd4 30 // Note that bit sequence is the oposite of what I initially thought they
CSTritt 111:47b0267b8dd4 31 // would be. That is, pins are listed in low order to high order sequence.
CSTritt 111:47b0267b8dd4 32 BusOut disBus(D9, D8, D7, D6, D5, D4, D3, D2); // The display.
CSTritt 111:47b0267b8dd4 33 int myCount = 0; // Loop count. Rolls over at 18.
CSTritt 111:47b0267b8dd4 34
CSTritt 108:eee3167b25b4 35 // Test the wiring.
CSTritt 112:2af5a1ac47d5 36
CSTritt 111:47b0267b8dd4 37 display(18, disBus); // All on (binary).
CSTritt 112:2af5a1ac47d5 38 pc.printf("Wiring test. All segments on.\n"); // Status message.
CSTritt 112:2af5a1ac47d5 39 ThisThread::sleep_for(2000); // Light all segments for 2 seconds.
CSTritt 111:47b0267b8dd4 40 display(17, disBus); // All off (binary).
CSTritt 112:2af5a1ac47d5 41 pc.printf("Wiring test All segments off.\n"); // Status message.
CSTritt 112:2af5a1ac47d5 42 ThisThread::sleep_for(2000); // Turn off all segments for 2 seconds.
CSTritt 111:47b0267b8dd4 43
CSTritt 111:47b0267b8dd4 44 // Enter main loop.
CSTritt 111:47b0267b8dd4 45 while(true) {
CSTritt 111:47b0267b8dd4 46 display(myCount, disBus); // Display myCount (count).
CSTritt 112:2af5a1ac47d5 47 pc.printf("In main myCount = %x.\n", myCount); // Send count to PC.
CSTritt 111:47b0267b8dd4 48 myCount++; // Increment the count.
CSTritt 111:47b0267b8dd4 49 if (myCount > 18) myCount = 0; // Rollover!
CSTritt 111:47b0267b8dd4 50 ThisThread::sleep_for(SLP_TIME); // Display value for 1 second.
CSTritt 111:47b0267b8dd4 51 }
CSTritt 108:eee3167b25b4 52 }