Diff: BatteryStatusScreen.h

Revision:

0:da2b8c7a1ec1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BatteryStatusScreen.h	Mon May 11 15:25:52 2015 +0000
@@ -0,0 +1,152 @@
+/**
+@file BaterryStatusScreen.h
+
+
+*/
+
+#ifndef BATTERYSTATUSSCREEN_H
+#define BATTERYSTATUSSCREEN_H
+
+#include "ParameterController.h"
+#include "Inputs.h"
+#include "Sensors.h"
+
+/**
+
+@brief Displays the current battery voltage along with it's sentiment on the LCD screen \n
+@brief It consists of a parameter controller\n 
+@brief battery voltage is shown in Volts\n
+@author Augustine Kizito K\n
+@date April 2015
+
+*/
+
+
+
+class BatteryStatusScreen : public ParameterController // inherit ParameterController Properties
+{
+    
+public:
+    /**
+    This functions manages the execution of the battery status screen
+    @returns 
+     -1 - Navigate to  previous screen
+    */
+    int start();
+    /**
+    Creates an instance of the battery status screen
+    
+    */
+    BatteryStatusScreen()
+        :ParameterController( "Voltage", // Parameter
+                              "Volts") // Units
+    {} // initialises parameter controller
+    
+private:
+
+    void setVoltageSentiment( float temperature); // get temperature sentiment
+    void voltageUpdate();  // update the voltage
+    float getCurrentVoltage(); // get the current voltage
+    void onBack(); // user pressed the back button
+    void onEnter(); // user pressed the enter button
+
+    bool changeScreen; // tracks if the user pressed a button that changes screen
+    int nextScreen; // tracks whether the user wants to go to
+    //the previous screen or next screen
+    Ticker voltTicker; // create ticker object
+
+
+};
+
+int BatteryStatusScreen::start()
+{
+
+    changeScreen = false;
+
+    float currentVoltage = getCurrentVoltage(); // get current temperature
+
+    backButton.mode(PullDown); // activate pullDown resistor
+    enterButton.mode(PullDown); // activate pullDown resistor
+
+    backButton.rise(this,&BatteryStatusScreen::onBack); // call onBack when the back button is pressed
+
+    debounce.start(); // start the debouncing timer
+
+    voltTicker.attach(this, &BatteryStatusScreen::voltageUpdate, 10); // update parameter every 10 seconds
+
+    // initialise the ParameterController appropriately
+    ParameterController::setValue(currentVoltage);
+    setVoltageSentiment(currentVoltage);
+    
+    // Launch the Parameter Controller
+    ParameterController::showInfo();
+
+    while(changeScreen == false) { // shows the screen until the user presses the back button
+        // mbed goes to sleep to save power
+        Sleep();
+    }
+
+    // detach interrupts
+    backButton.rise(NULL);
+    voltTicker.detach();
+
+    return nextScreen;
+}
+
+void BatteryStatusScreen::voltageUpdate()
+{
+
+    float currentVoltage = getCurrentVoltage(); // get current voltage
+    // update the voltage sentiment
+    setVoltageSentiment(currentVoltage);
+
+    // initialise the ParameterController appropriately
+    ParameterController::setValue(currentVoltage);
+    ParameterController::updateInfo();
+
+}
+
+
+void BatteryStatusScreen::setVoltageSentiment(float batteryVoltage)
+{
+    if (batteryVoltage > 7.92) { // battery voltage is greater than 2.6V
+        // battery has three bars
+        ParameterController::setSentiment("Battery Full  ");
+
+    } else if ( (batteryVoltage < 7.92 )&& (batteryVoltage > 6.5)) { // battery voltage is between 2.64V and 1.65V
+        // battery has two bars
+        ParameterController::setSentiment("Sufficient    ");
+
+    } else if ((batteryVoltage < 6.5) && (batteryVoltage > 6)) { // battery voltage is between 1.65V and 0.66V
+        // battery has one bar
+        ParameterController::setSentiment("Battery Low   ");
+    } else { // battery voltage is less than 0.66V
+        // empty battery
+        ParameterController::setSentiment("Change Battery");
+    }
+
+}
+
+float BatteryStatusScreen::getCurrentVoltage()
+{
+    float voltage = getVoltage(); // read voltage
+    return voltage;
+}
+
+void BatteryStatusScreen::onBack()
+{
+    if (debounceSuccess()) {
+        playSound(); // play sound from buzzer
+        nextScreen = -1;
+        changeScreen = true; // user wants to view a different screen
+        debounce.reset(); // reset the timer
+    }
+
+
+}
+
+
+
+
+
+#endif
\ No newline at end of file