Coding for vehicle rear assistant

Dependencies:   beep mbed

Fork of Vehicle_Rear_Assistant by amin omar

Vehicle Rear Assistant ELEC 2645 el14a2o

Files at this revision

API Documentation at this revision

Comitter:
aminomar
Date:
Fri May 08 21:54:44 2015 +0000
Commit message:
code finished;

Changed in this revision

LCD_DISPLAY.lib Show annotated file Show diff for this revision Revisions of this file
PowerControl.lib Show annotated file Show diff for this revision Revisions of this file
SENSOR_SRF02.lib Show annotated file Show diff for this revision Revisions of this file
beep.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
main.h Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file
mbedmicrocontroller_experimentalpowerdown (1).if Show annotated file Show diff for this revision Revisions of this file
diff -r 000000000000 -r 53f28990602d LCD_DISPLAY.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_DISPLAY.lib	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/aminomar/code/LCD_DISPLAY/#0c85edd2dbd2
diff -r 000000000000 -r 53f28990602d PowerControl.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PowerControl.lib	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/aminomar/code/PowerControl/#6a9b3a48b23a
diff -r 000000000000 -r 53f28990602d SENSOR_SRF02.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SENSOR_SRF02.lib	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/aminomar/code/SENSOR_SRF02/#688e41b7a3ea
diff -r 000000000000 -r 53f28990602d beep.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/beep.lib	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/dreschpe/code/beep/#d8e14429a95f
diff -r 000000000000 -r 53f28990602d main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,42 @@
+/**
+@file main.cpp
+
+@brief Program implementation
+@brief Functions are called here when needed
+*/
+#include "main.h"
+                                    //main function
+int main()
+{
+    PHY_PowerDown();                        //Ethernet Power Down
+    lcd.init();                             // the LCD display is initiated first when switch is on
+    welcomeText();
+    lcd.clear();
+    button.rise(&buttonPressed);            //event generated on rising edge
+    
+    /// distance is measured in this loop
+    while (1) {
+        lcdBrightness = potBrightness;      //to adjust brightness using potentiometer
+        getDistance();
+        readDistance();
+        lcd.clear();
+     /// buttonFlag is set back to 0   
+    if (buttonFlag){                        //if flag is set = 1
+        
+        ///the value of displayReading is inverted
+        displayReading = ~displayReading;   //if '~displayReading'(button is pushed again) value will not be dispayed 
+        buttonFlag = 0;                     // reset button back to 0
+        }
+        
+        ///if the condition is meet, value of distance will be displayed
+    if (displayReading){                    //if 'displayReading'(button is pushed) value of distance is displayed
+        int distance=sensor.getDistanceCm();
+        char buffer[14];
+        int length = sprintf(buffer,"D= %d cm",distance);
+        if(length<=14)
+        lcd.printString(buffer,7,1);
+        lcd.drawRect(5,6,60,10,0);            //lcd.drawRect(76(x),0(y),7(w),48(h),1(type))>>>>box for distance value
+        }
+    }
+}
+
diff -r 000000000000 -r 53f28990602d main.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.h	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,254 @@
+/**
+@file main.h
+@brief Header file containing functions prototypes, defines and global variables.
+@brief The software of Vehicle Rear Assistant.
+@brief ELEC 2645
+@author Aminuddin Omar
+@date   APRIL 2015
+*/
+
+#ifndef MAIN_H
+#define MAIN_H
+
+                                     //Declare libraries to be used 
+#include "mbed.h"
+#include "PowerControl/PowerControl.h"
+#include "PowerControl/EthernetPowerControl.h"
+#include "N5110.h"
+#include "SRF02.h"
+#include "beep.h"
+
+/**  
+@namespace lcd
+@brief GPIO pins for LCD display
+@namespace sensor
+@brief GPIO pins for SRF02
+@namespace buzzer
+@brief PWM pin for piezo buzzer
+@namespace danger
+@brief PWM pin for RED LED
+@namespace caution
+@brief PWM pin for YELLOW LED
+@namespace safe
+@brief PWM pin for GREEN LED
+@namespace lcdBrightness
+@brief PWM pin for LCD backlight
+@namespace potBrightness
+@brief AnalogIn pin for potentiometer
+@namespace button
+@brief InterruptIn pin for button
+*/                                    
+N5110 lcd(p7,p8,p9,p10,p11,p13,p26);                  //(LCD_VCC, sce, rst, dc, mosi, sck, backlight)
+SRF02 sensor(p28, p27);
+Beep buzzer(p21);                       
+PwmOut danger(p24);                                  //danger = red
+PwmOut caution(p23);                                 //caution = yellow
+PwmOut safe(p22);                                    //safe = green
+PwmOut lcdBrightness(p26);                           //lcd backlight (pin26)     
+AnalogIn potBrightness(p20);                         //potentiometer (pin20)
+InterruptIn button(p17);                             //push button to display value of distance
+
+                                    //variables                            
+int distance;             /*!< measure distance between car and object */
+int buttonFlag = 0;       /*!< print flag set in ISR */
+int displayReading = 0;   /*!< display the value of distance on LCD */
+
+                                     //Initialise all the functions
+                                     
+/**
+Print welcome message when switch is turned on
+@param a - set number of letters that can be written including space
+@param message - Print HELLO
+@param rear - Print REAR
+@param assistant - Print ASSISTANT
+@param name - Print A.OMAR
+@param number - Print 200906568
+*/
+void welcomeText();
+
+/**
+Measure distance between car and objects
+@param distance - use SRF02 to measure distance
+*/
+void getDistance();
+
+/**
+Print "CAR" and a block on LCD according to distance measured
+@param lcd.drawRect - draw rectangle to represent object 
+@param lcd.printString - draw "CAR" to represent car
+@param lcd.refresh() - refresh LCD display
+@param distanceSafe() - GREEN LED and buzzer is activated in safe mode
+@param distanceCaution() - YELLOW LED and buzzer is activated in caution mode
+@param distanceDanger() - RED LED and buzzer is activated in danger mode
+*/
+void readDistance();
+
+/**
+This function is called when in safe mode
+@param safe - only GREEN LED light up
+@brief buzzer is called and beep according to distance
+*/
+void distanceSafe();
+
+/**
+This function is called when in caution mode
+@param safe - only YELLOW LED light up
+@brief buzzer is called and beep according to distance
+*/
+void distanceCaution();
+
+/**
+This function is called when in danger mode
+@param safe - only RED LED light up
+@brief buzzer is called and beep according to distance
+*/
+void distanceDanger();
+
+/**
+This function is called when button is pressed
+@param buttonFlag - set the button flag to 1
+*/
+void buttonPressed();
+
+
+                                    //Print welcome message (letters are print one by one)
+void welcomeText()
+{     
+    int a[9] = {12,18,24,30,36,42,48,54,60};
+    const char message[6] = {'H','E','L','L','O','!'};
+    char rear[4] = {'R','E','A','R'};
+    char assistant[9] = {'A','S','S','I','S','T','A','N','T'};
+    char name[6] = {'A','.','O','M','A','R'};
+    char number[9] = {'2','0','0','9','0','6','5','6','8'};
+    int i;
+    for(i=0; i<6; i++) {
+        lcd.printChar(message[i],a[i],0);
+        wait(0.05);
+    }
+    for(i=0; i<4; i++) {
+        lcd.printChar(rear[i],a[i],2);
+        wait(0.05);
+    }
+    for(i=0; i<9; i++) {
+        lcd.printChar(assistant[i],a[i],3);
+        wait(0.05);
+    }
+    for(i=0; i<6; i++) {
+        lcd.printChar(name[i],a[i],4);
+        wait(0.05);
+    }
+    for(i=0; i<9; i++) {
+        lcd.printChar(number[i],a[i],5);
+        wait(0.05);
+    }
+    lcd.refresh();
+    wait(2.5); 
+}
+
+                                    //sensor is set to get the distance
+void getDistance()
+{
+    distance = sensor.getDistanceCm();
+}
+
+                                    //sensor read distance & lcd display 'CAR' and 'rectangle' 
+void readDistance()
+{
+        if (distance >= 230) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL   lcd.drawRect(76(x),0(y),7(w),48(h),1(type))
+        lcd.printString("CAR",5,3); //CAR
+        lcd.refresh();
+        distanceSafe();
+    }
+    else if (distance >= 190 & distance <= 229) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL
+        lcd.printString("CAR",15,3);//CAR
+        lcd.refresh();
+        distanceSafe();
+    }
+    else if (distance >= 150 & distance <= 189) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL
+        lcd.printString("CAR",25,3);//CAR
+        lcd.refresh();
+        distanceSafe();
+    }
+    else if (distance >= 120 & distance <= 149) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL
+        lcd.printString("CAR",30,3);//CAR
+        lcd.refresh();
+        distanceCaution();
+    }
+    else if (distance >= 100 & distance <= 119) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL
+        lcd.printString("CAR",39,3);//CAR
+        lcd.refresh();
+        distanceCaution();
+    }
+    else if (distance >= 70 & distance <= 99) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL
+        lcd.printString("CAR",48,3);//CAR
+        lcd.refresh();
+        distanceCaution();
+    }
+    else if (distance >=  45& distance <= 69) 
+    {
+        lcd.drawRect(76,0,7,48,1);  //WALL
+        lcd.printString("CAR",55,3);//CAR
+        lcd.refresh();
+        distanceDanger();
+    }
+    else if (distance <= 44) 
+    {
+        lcd.printString("!!STOP!!",25,3);//print "STOP" only
+        lcd.refresh();
+        distanceDanger();
+    }
+}
+
+                                //safe to reverse car
+void distanceSafe()         
+{
+    danger = 0;             
+    caution = 0;
+    safe = 1;               //>>>>>>>>>safe = green led light up in safe mode
+    buzzer.beep(1000,1);
+    wait(1);
+    buzzer.nobeep();
+}
+
+                                //caution : reverse car carefuly
+void distanceCaution()      
+{
+    danger = 0;
+    caution = 1;           //>>>>>>caution = yellow led light up in caution mode
+    safe = 0;
+    buzzer.beep(1000,1);
+    wait(0.4);
+    buzzer.nobeep();
+}
+
+                                //danger : stop reverse car
+void distanceDanger()       
+{
+    danger = 1;             //>>>>>>>danger = red led light up in danger mode
+    caution = 0;
+    safe = 0;
+    buzzer.beep(1000,1);
+    wait(0.2);
+    buzzer.nobeep();
+}
+
+
+                                //INTERRUPT SERVICE ROUTINE
+void buttonPressed() 
+{
+    buttonFlag = 1; //set flag
+}
+
+#endif
diff -r 000000000000 -r 53f28990602d mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri May 08 21:54:44 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/433970e64889
\ No newline at end of file
diff -r 000000000000 -r 53f28990602d mbedmicrocontroller_experimentalpowerdown (1).if
Binary file mbedmicrocontroller_experimentalpowerdown (1).if has changed