Diff: Accel.h

Revision:

2:c3e9a24a3ddf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Accel.h	Mon May 11 22:54:16 2015 +0000
@@ -0,0 +1,172 @@
+/**
+@file Accel.h
+@brief Header file containing functions prototypes, defines and global variables.
+@brief Revision 1.0.
+@author Mario Quartey Papafio
+@date   May 2015
+*/
+
+#ifndef ACCEL_H
+#define ACCEL_H
+
+#define PI 3.141592
+
+#include "mbed.h"
+#include "N5110.h"
+#include "MMA8452.h"
+#include "PowerControl/PowerControl.h"
+#include "PowerControl/EthernetPowerControl.h"
+
+
+/**
+@namespace buffer
+@namespace buffer1
+@namespace buffer2
+@namespace buffer3
+@namespace myled
+@namespace buzzer
+@namespace N5110 lcd
+@brief GPIO output for status LED,BUZZER N5110 lcd
+*/
+
+//char buffer[14]; 
+        // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+        // so can display a string of a maximum 14 characters in length
+        // or create formatted strings - ensure they aren't more than 14 characters long
+
+/** Initialise LCD and MMA8542 sensor(accelerometer)
+    *
+    *   Powers up the display and turns on backlight (50% brightness default).
+    *   Sets the display up in horizontal addressing mode and with normal video mode.
+    *   Powers up MMA8542 sensor
+    *   Default values100 Hz update rate, ±4g scale
+    */
+void turnon();
+
+/** Gets readings and prints to LCD.
+    *
+    *   Gets the x,y,z data
+    *   Calculates Magnitude
+    *   Displays Magnitude and x,y,z data
+    */
+void readings();
+
+/**
+@code
+
+/// Buffers for values to be read or calculated
+char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+char buffer1[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+char buffer2[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+char buffer3[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+
+/// Gets Readings and Displays them
+void readings();
+
+PwmOut myled(p22);
+PwmOut buzzer(p21);
+//    VCC,SCE,RST,D/C,MOSI,SCLK,LED    order of mbed pins should match
+N5110 lcd(p7,p8,p9,p10,p11,p13,p26);
+
+@brief AnalogIn input for number of readings per second
+@brief serial input for accelerometer readings
+
+MMA8452 mma8452(p28,p27);  // SDA, SCL
+Serial serial(USBTX,USBRX);
+AnalogIn pot(p20);
+
+Timeout timer; // create ticker object
+
+/// sets flag to 0
+int timerFlag = 0; // flag for timer
+
+///Interrupt Service Routine
+void timerExpired() {
+    timerFlag = 1;
+    
+    adds float value x
+@param x - float to use for pot, to set number of readings per second
+@returns the value of x
+
+    /// sets the scale for x to be able to reach 1-45 readings per second
+    float x=-(1-pot.read())*44/45+1;
+    timer.detach();
+    timer.attach(&timerExpired,x);
+    
+}
+///Turns on LCD AND Accelerometer.
+void turnon () { 
+     lcd.init();
+     lcd.printString("Mario Quartey", 0,0);
+     lcd.printString("Accelerometer", 0,1);
+     lcd.printString("Elec 2645", 0,2);
+     lcd.printString("Dr C Evans!", 0,3);
+     lcd.refresh();
+     wait(2);
+     lcd.clear();
+     mma8452.init();  // 100 Hz update rate, ±4g scale
+     }
+/// Gets readings and Prints to LCD
+void readings () {
+     Acceleration acceleration; 
+     lcd.printString("X Y Z Values", 0,0);
+        acceleration = mma8452.readValues();   // read current values and print over serial port
+         int xx = sprintf(buffer, "x = %.2f", acceleration.x); // figure eout the length of chars
+         int yy =  sprintf(buffer1, "y = %.2f", acceleration.y);
+         int zz = sprintf(buffer2, "z = %.2f", acceleration.z);
+         
+         
+         ///calculates the square root,multiplication and addition of the 3 arguments and return
+         Multiplies and square roots and adds three float variables
+         * @param acceleration.x
+         * @param acceleration.y
+         * @param acceleration.z
+         * @returns the multipplication, addition and square root of (acceleration.x)^2 and (acceleration.y)^2 and (acceleration.z)^2
+         //
+         
+          float mag = sqrt((acceleration.x*acceleration.x + acceleration.y*acceleration.y + acceleration.z*acceleration.z));
+          int ff = sprintf(buffer3, "Mag = %.2f", mag);
+        wait(0.1);   // short delay until next reading
+        if (xx <= 14){  // if the length is smaller than 14 chars. it prints
+            lcd.printString(buffer, 10, 1);
+        if (yy <= 14){  // if the length is smaller than 14 chars. it prints
+            lcd.printString(buffer1, 10, 2);
+        if (zz <= 14){  // if the length is smaller than 14 chars. it prints
+            lcd.printString(buffer2, 10, 3);
+        if (mag <= 14){  // if the length is smaller than 14 chars. it prints
+            lcd.printString(buffer3, 10, 4);   
+        
+    /// Compares Values for magnitude and Triggers Buzzer
+            if (mag > 1.5)
+            for(float p = 0.0f; p < 1.0f; p += 0.1f) {
+            buzzer = p;
+            wait (0.3);
+            buzzer = 0;
+        }}}}}}  
+        
+
+int main() {
+   turnon();
+    
+    timer.attach(&timerExpired,1);
+
+PHY_PowerDown(); //Powers Down ethernet
+
+/// Flash LED in Infinite loop, while readings are being taken.
+    while (1) {
+       
+        for(float p = 0.0f; p < 1.0f; p += 0.1f) {
+            myled = p;
+             }
+         if (timerFlag) {
+            readings ();
+            
+            timerFlag = 0;
+            }
+       lcd.refresh();
+        }
+            
+     }
+*/
+
+#endif
\ No newline at end of file