Todd Clark
Breathalyzer running on the MBED 1768 Platform; EE4427 Group 3 Spring 2018
Dependencies: 4DGL-uLCD-SE mbed
Revision 0:35f90b280233, committed 2018-04-23
- Comitter:
- phred754
- Date:
- Mon Apr 23 22:18:27 2018 +0000
- Commit message:
- EE4427 Final Project Group 3
Changed in this revision
diff -r 000000000000 -r 35f90b280233 4DGL-uLCD-SE.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/4DGL-uLCD-SE.lib Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,1 @@ +http://os.mbed.com/users/sparkfun/code/4DGL-uLCD-SE/#e39a44de229a
diff -r 000000000000 -r 35f90b280233 convertToBAC.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/convertToBAC.cpp Mon Apr 23 22:18:27 2018 +0000
@@ -0,0 +1,11 @@
+//Written by Todd Clark
+#include "convertToBAC.h"
+
+float getBAC(float input){
+ float voltage = input * 3; //Conversion from input resistance to voltage.
+ float calibratedVoltage = voltage / 0.6; //Convert voltage to work with our 3 volt output signal.
+ float ppm = 1033.992 + (55.84479 - 1033.992)/(1 + pow((calibratedVoltage/4.540421), 8.423297)); //Calculate ppm from our voltage values based on specs for MQ-3 gas sensor.
+ float bac = (ppm * 0.21) / 100; //Calculate BAC from ppm. Formula taken from http://nootropicdesign.com/projectlab/2010/09/17/arduino-breathalyzer/
+ float calibratedBac = bac - 0.12; //Calibrate sensor based on value at 0% alcohol.
+ return (calibratedBac < 0.0) ? 0 : calibratedBac;
+}
\ No newline at end of file
diff -r 000000000000 -r 35f90b280233 convertToBAC.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/convertToBAC.h Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,4 @@ +//Written by Todd Clark +#include "mbed.h" + +float getBAC(float input); \ No newline at end of file
diff -r 000000000000 -r 35f90b280233 lcdOut.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lcdOut.cpp Mon Apr 23 22:18:27 2018 +0000
@@ -0,0 +1,66 @@
+//Written by Todd Clark
+#include "lcdOut.h"
+
+uLCD_4DGL uLCD(p9,p10,p11); //Set up serial bus for LCD screen as an object using code library for LCD from https://os.mbed.com/users/sparkfun/code/4DGL-uLCD-SE/
+int textSize;
+float legalLimit;
+
+void resetDisplay(){
+ uLCD.background_color(BLACK);
+ uLCD.cls();
+ uLCD.textbackground_color(BLACK);
+ displayStart();
+}
+
+void displayTest(float out, bool isUtahMode){
+ legalLimit = (isUtahMode) ? 0.05 : 0.08;
+
+ uLCD.baudrate(115200);
+ uLCD.background_color(WHITE);
+ uLCD.cls();
+ uLCD.textbackground_color(WHITE);
+
+ textSize = 1;
+ uLCD.locate(0, 1);
+ uLCD.text_width(textSize);
+ uLCD.text_height(textSize);
+ uLCD.color(BLACK);
+ uLCD.printf("Your BAC is:%.2f", out);
+
+ uLCD.locate(0, 3);
+ uLCD.printf("The maximum legal limit is %.2f", legalLimit);
+
+ uLCD.locate(0, 6);
+ if (out < legalLimit){
+ uLCD.color(BLUE);
+ uLCD.printf("You are under the legal limit.", legalLimit);
+ }
+ else{
+ uLCD.color(RED);
+ uLCD.printf("You are drunk! \nDo not Drive!");
+ }
+}
+
+void displayStart(){
+ textSize = 1;
+ uLCD.locate(3, 1);
+ uLCD.text_width(textSize);
+ uLCD.text_height(textSize);
+ uLCD.color(RED);
+ uLCD.printf("Breathalyzer \n");
+
+ uLCD.locate(0, 3);
+ uLCD.text_width(textSize);
+ uLCD.text_height(textSize);
+ uLCD.color(BLUE);
+ uLCD.printf("Press button to \nconduct test\n");
+}
+
+void displayOut(float out, bool isUtahMode){
+ if(out == -1.0){
+ displayStart();
+ }
+ else{
+ displayTest(out, isUtahMode);
+ }
+}
\ No newline at end of file
diff -r 000000000000 -r 35f90b280233 lcdOut.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lcdOut.h Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,10 @@ +//Written by Todd Clark +#include "mbed.h" +#include "uLCD_4DGL.h" + +void displayOut(float out, bool isUtahMode); +void displayTest(float out, bool isUtahMode); +void displayStart(); +void resetDisplay(); + +
diff -r 000000000000 -r 35f90b280233 light.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/light.cpp Mon Apr 23 22:18:27 2018 +0000
@@ -0,0 +1,30 @@
+//Written by Madison Wilkey
+#include "light.h"
+
+PwmOut led_red(p21);
+PwmOut led_green(p22);
+PwmOut led_blue(p23);
+
+void changeRed(){
+ led_red.write(1.0f);
+ led_green.write(0.0f);
+ led_blue.write(0.0f);
+}
+
+void changeBlue(){
+ led_red.write(0.0f);
+ led_green.write(0.0f);
+ led_blue.write(1.0f);
+}
+
+void changeGreen(){
+ led_red.write(0.0f);
+ led_green.write(1.0f);
+ led_blue.write(0.0f);
+}
+
+void turnOff(){
+ led_red.write(0.0f);
+ led_green.write(0.0f);
+ led_blue.write(0.0f);
+}
\ No newline at end of file
diff -r 000000000000 -r 35f90b280233 light.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/light.h Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,8 @@ +//Written by Madison Wilkey +#include "mbed.h" + +void changeLight(bool isOverLimit); +void changeRed(); +void changeGreen(); +void changeBlue(); +void turnOff(); \ No newline at end of file
diff -r 000000000000 -r 35f90b280233 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Apr 23 22:18:27 2018 +0000
@@ -0,0 +1,81 @@
+//Written by Todd Clark
+#include "mbed.h"
+#include "lcdOut.h"
+#include "sensor.h"
+#include "light.h"
+#include "convertToBAC.h"
+#include "switch.h"
+
+BusOut onboardLED {LED1,LED2,LED3,LED4};
+InterruptIn button(p18);
+Timer debounce;
+Ticker reset;
+
+bool overLimit;
+bool lightsOn = false;
+
+bool isOverLimit(float out, bool isUtahMode){
+ float legalLimitBAC = (isUtahMode) ? 0.05 : 0.08;
+ return (out < legalLimitBAC) ? false : true;
+}
+
+void resetLights(){
+ lightsOn = false;
+ turnOff();
+ resetDisplay();
+ onboardLED = 0x0;
+}
+
+void runTest(){
+ reset.attach(&resetLights, 30);
+ bool isUtahMode = getUtahMode();
+ float input = takeReading();
+ float out = getBAC(input);
+ overLimit = isOverLimit(out, isUtahMode);
+ displayOut(out, isUtahMode);
+}
+
+void toggle(){
+ if (debounce.read_ms()>200){
+ runTest();
+ lightsOn = true;
+ debounce.reset();
+ }
+}
+
+void initialize(){
+ debounce.start();
+ button.rise(&toggle);
+}
+
+int main(){
+ float delay = 0.1;
+ displayOut(-1.0, false);
+ while(1){
+ initialize();
+ if(overLimit && lightsOn){
+ changeBlue();
+ onboardLED = 0x1;
+ wait(delay);
+ changeRed();
+ onboardLED = 0x2;
+ wait(delay);
+ changeBlue();
+ onboardLED = 0x4;
+ wait(delay);
+ changeRed();
+ onboardLED = 0x8;
+ }
+ else if(lightsOn){
+ changeGreen();
+ onboardLED = 0x0;
+ }
+ else{
+ turnOff();
+ onboardLED = 0x0;
+ }
+ wait(delay);
+ }
+}
+
+
diff -r 000000000000 -r 35f90b280233 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/994bdf8177cb \ No newline at end of file
diff -r 000000000000 -r 35f90b280233 sensor.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sensor.cpp Mon Apr 23 22:18:27 2018 +0000
@@ -0,0 +1,7 @@
+//Written by Madison Wilkey
+#include "sensor.h"
+AnalogIn sensorInput(p15);
+
+float takeReading(){
+ return sensorInput.read();
+}
\ No newline at end of file
diff -r 000000000000 -r 35f90b280233 sensor.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sensor.h Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,4 @@ +//Written by Madison Wilkey +#include "mbed.h" + +float takeReading(); \ No newline at end of file
diff -r 000000000000 -r 35f90b280233 switch.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/switch.cpp Mon Apr 23 22:18:27 2018 +0000
@@ -0,0 +1,8 @@
+//Written by Madison Wilkey
+#include "switch.h"
+
+DigitalIn toggleSwitch(p5);
+
+bool getUtahMode(){
+ return toggleSwitch;
+}
\ No newline at end of file
diff -r 000000000000 -r 35f90b280233 switch.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/switch.h Mon Apr 23 22:18:27 2018 +0000 @@ -0,0 +1,4 @@ +//Written by Madison Wilkey +#include "mbed.h" + +bool getUtahMode(); \ No newline at end of file