Charles Tritt / Mbed 2 deprecated mySmrtNL_2

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   mbed

Fork of aReadConditional by Charles Tritt

main.cpp@6:48052cf53bf2, 2017-10-08 (annotated)

Committer:
CSTritt
Date:
Sun Oct 08 03:39:44 2017 +0000
Revision:
6:48052cf53bf2
Parent:
5:a08ed9b4c671 
Reading of DigitalOut states made explicit. Comments cleaned up.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
CSTritt 0:2254358fce87 1 /*
CSTritt 5:a08ed9b4c671 2 Project: mySmrtNL_2(for My Smart Nightlight)
CSTritt 0:2254358fce87 3 File: main.cpp
CSTritt 5:a08ed9b4c671 4
CSTritt 0:2254358fce87 5 Reads from analog input, streams ASCII text to std serial using printf and
CSTritt 5:a08ed9b4c671 6 DigitalOut control of external LEDs. Default serial configuration is 9600
CSTritt 5:a08ed9b4c671 7 baud, 8 data bits, no parity and 1 stop bit.
CSTritt 5:a08ed9b4c671 8
CSTritt 5:a08ed9b4c671 9 Requires manual calibration. Enter max. and min. values below, recompile
CSTritt 5:a08ed9b4c671 10 and send to Nucleo board.
CSTritt 5:a08ed9b4c671 11
CSTritt 0:2254358fce87 12 Written by: Dr. C. S. Tritt
CSTritt 5:a08ed9b4c671 13 Created: 10/7/17 (v. 2.0)
CSTritt 5:a08ed9b4c671 14
CSTritt 0:2254358fce87 15 */
CSTritt 0:2254358fce87 16 #include "mbed.h"
CSTritt 0:2254358fce87 17
CSTritt 0:2254358fce87 18 const int HIGH = 1; // Optional, but makes code more readable.
CSTritt 0:2254358fce87 19 const int LOW = 0; // Optional, but makes code more readable.
CSTritt 5:a08ed9b4c671 20
CSTritt 3:0756601ff19e 21 AnalogIn analog_value(A0); // Construct AnalogIn object called analog_value.
CSTritt 5:a08ed9b4c671 22
CSTritt 5:a08ed9b4c671 23 DigitalOut red(D2); // Construct DigitalOut object called red.
CSTritt 5:a08ed9b4c671 24 DigitalOut grn(D3); // Construct DigitalOut object called grn.
CSTritt 5:a08ed9b4c671 25 DigitalOut blu(D4); // Construct DigitalOut object called blu.
CSTritt 0:2254358fce87 26
CSTritt 5:a08ed9b4c671 27 int main()
CSTritt 5:a08ed9b4c671 28 {
CSTritt 5:a08ed9b4c671 29 const float v_max = 1.0f; // Change to your max. serial value.
CSTritt 5:a08ed9b4c671 30 const float v_min = 0.0f; // Change to your min. serial value.
CSTritt 5:a08ed9b4c671 31 const float step = (v_max - v_min)/4.0f; // Calibration step size.
CSTritt 5:a08ed9b4c671 32 const float g_off_r_on = v_max - step; // Green off, red on value.
CSTritt 5:a08ed9b4c671 33 const float b_off_g_on = v_max - 2.0f*step; // Blue off, green on value.
CSTritt 5:a08ed9b4c671 34 const float b_on = v_max - 3.0f*step; // Blue on value.
CSTritt 5:a08ed9b4c671 35
CSTritt 0:2254358fce87 36 float value; // Value to be read and sent to serial port.
CSTritt 5:a08ed9b4c671 37
CSTritt 3:0756601ff19e 38 printf("\nAnalogIn example\n"); // Identify program.
CSTritt 5:a08ed9b4c671 39
CSTritt 0:2254358fce87 40 while(true) {
CSTritt 0:2254358fce87 41 value = analog_value.read(); // Read the analog input value (0 to 1)
CSTritt 0:2254358fce87 42 printf("Value = %f\n", value); // Send value as text via serial port.
CSTritt 5:a08ed9b4c671 43 if (value > g_off_r_on) { // Activate red for darkest conditions.
CSTritt 5:a08ed9b4c671 44 red.write(HIGH);
CSTritt 5:a08ed9b4c671 45 grn.write(LOW);
CSTritt 5:a08ed9b4c671 46 blu.write(LOW);
CSTritt 5:a08ed9b4c671 47 } else if (value > b_off_g_on) { // Activate green for dim light.
CSTritt 5:a08ed9b4c671 48 red.write(LOW);
CSTritt 5:a08ed9b4c671 49 grn.write(HIGH);
CSTritt 5:a08ed9b4c671 50 blu.write(LOW);
CSTritt 5:a08ed9b4c671 51 } else if (value > b_on) {// Activate blue for brighter light.
CSTritt 5:a08ed9b4c671 52 red.write(LOW);
CSTritt 5:a08ed9b4c671 53 grn.write(LOW);
CSTritt 5:a08ed9b4c671 54 blu.write(HIGH);
CSTritt 5:a08ed9b4c671 55 } else { // All junctions off for brightest light.
CSTritt 5:a08ed9b4c671 56 red.write(LOW);
CSTritt 5:a08ed9b4c671 57 grn.write(LOW);
CSTritt 5:a08ed9b4c671 58 blu.write(LOW);
CSTritt 0:2254358fce87 59 }
CSTritt 6:48052cf53bf2 60 // Read and send LED state via serial.
CSTritt 6:48052cf53bf2 61 printf("RGB State: %d %d %d\n", red.read(), grn.read(), blu.read());
CSTritt 3:0756601ff19e 62 wait(0.5); // Half a second (500 mS).
CSTritt 0:2254358fce87 63 }
CSTritt 4:acc6be2bbe21 64 }