Diff: main.cpp

Revision:

0:7d6134e052e0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Nov 23 04:58:09 2019 +0000
@@ -0,0 +1,172 @@
+#include "mbed.h"
+#include <string>
+#include "C12832.h"
+#include "ENGO333_MMA7660.h"
+#include "ENGO333_MPU9150.h"
+#include "Tiltmeter.h"
+
+// Enumeration of accelerometer types
+// For more information, see the following links
+//  - https://en.cppreference.com/w/c/language/enum
+//  - http://www.cplusplus.com/doc/tutorial/other_data_types/
+enum AccelType
+{
+    MMA7660,    // MMA7660 accelerometer on the mbed application board
+    MPU9150     // MPU9150 IMU (external to mbed application board)
+};
+
+
+// Function to prompt the user to select between the MMA7660 accelerometer or
+// the MPU9150 IMU. The user can select between these choices by moving the 
+// joystick left or right; they make their selection by pressing the joystick
+// button.
+//
+// Arguments:
+//    lcd = The LCD screen to use for display
+//    joystick = Object linked to the joystick to be used
+//
+// Returns:
+//    The function returns an enumeration identifying the sensor selected
+AccelType SelectAccelerometer( C12832& lcd, BusIn& joystick );
+
+
+int main()
+{
+    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    // START: Setup/variable declaration
+
+
+    // Create LCD object for LCD screen operations
+    C12832 lcd(p5, p7, p6, p8, p11);
+
+    // Create digital outputs for LED1 and LED2 that will be used to indicate
+    // if things are working properly -- both values are to LOW (off)
+    DigitalOut led1(LED1);
+    DigitalOut led2(LED2);
+    led1 = 0;
+    led2 = 0;
+
+    // Create bus input for joystick
+    BusIn joystick(p13, p16, p14);     // Binary [ Centre | Right | Left ] joystick
+    
+    
+    // END: Setup/variable declaration
+    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    // START: Take Measurements
+    
+    
+    // Create an accelerometer object
+    ENGO333_MMA7660 accelerometer;  
+    
+    
+    // Detect sensor
+    if( accelerometer.TestConnection() ) 
+    {
+        // Turn on the first LED to show that the connection was detected
+        led1 = 1;
+    } 
+    else 
+    {
+        lcd.locate(1, 11);
+        lcd.printf("ERROR: Unknown sensor");
+        return 1;
+    }
+
+
+    // Prepare the screen
+    lcd.cls();
+    lcd.locate(1, 1);
+    lcd.printf("Press joystick to measure");
+
+    
+    // Variable to store the value/status of the joystick. It is initialized
+    // to represent pushing the joystick button. Since the loop below 
+    while( true ) 
+    {
+        // Check if the joystick button is being pressed
+        if (joystick.read() == 4) 
+        {
+            // Turn on second LED to indicate a measurement is being made
+            led2 = 1;
+            
+            
+            // Get the tilt angles
+            accelerometer.ComputeTiltAngles();            
+            
+            
+            // Print the roll
+            lcd.locate(1, 11);
+            lcd.printf("Roll (deg)");
+            lcd.locate(50, 11);
+            lcd.printf(": % 8.2f", accelerometer.GetRoll());
+            
+            // Print the pitch
+            lcd.locate(1, 21);
+            lcd.printf("Pitch (deg)");
+            lcd.locate(50, 21);
+            lcd.printf(": % 8.2f", accelerometer.GetPitch());
+            
+            
+            // Short delay to avoid multiple measurements being displayed
+            wait_ms(250);
+
+
+            // Turn off second LED to indicate a measurement is complete
+            led2 = 0;
+        }
+        
+    }
+    
+    
+    // END: Take Measurements
+    //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    
+}
+
+
+AccelType SelectAccelerometer( C12832& lcd, BusIn& joystick )
+{
+    // This is the current choice
+    AccelType choice = MMA7660;
+    
+    // This is the string to display the current choice (using asterisk)
+    string sensorChoice = "MMA7660 *       MPU9150";
+    
+    // Print the default choice
+    lcd.cls();
+    lcd.locate(1, 1);
+    lcd.printf("Move L/R to select sensor:");
+    lcd.locate(1, 18);
+    lcd.printf("%s", sensorChoice.c_str());
+
+  
+    // Create while-loop for user to select sensor
+    while(1) 
+    {
+        // read the joystick
+        int joy = joystick.read();
+        
+        
+        if (joy == 2)       // joystick pushed to the right
+        {                  
+            sensorChoice = "MMA7660       * MPU9150";
+            choice = MPU9150;
+            lcd.locate(1, 18);
+            lcd.printf("%s", sensorChoice.c_str());
+        } 
+        else if (joy == 1)  // joystick pushed to the left
+        {
+            sensorChoice = "MMA7660 *       MPU9150";
+            choice = MMA7660;
+            lcd.locate(1, 18);
+            lcd.printf("%s", sensorChoice.c_str());
+        } 
+        else if (joy == 4)  // joystick "button" pushed (i.e., "select")
+        {      
+            break;
+        } 
+    }
+    
+    // return the current choice
+    return choice;
+}