Diff: main.cpp

Revision:

0:85181831ea03

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Nov 10 17:30:55 2014 +0000
@@ -0,0 +1,149 @@
+/**
+ * Interactive Device Design, Fall 2014
+ * Homework 5 - Wind and Window controller
+ * Freescale Freedom KL25Z Board
+ *
+ * Ian Shain
+ * Doug Cook
+ * Kiyana Salkeld
+ * Elizabeth Lin
+ *
+ */
+
+#include "mbed.h"
+#include "Servo.h"
+#include "Window.h"
+#include <string>
+
+Serial pc(USBTX, USBRX);
+Serial ble(PTC4,PTC3); // PTC4 (purple) -> TX, PTC3 (gray) -> RX
+const float ANALOG_HALF = 0.499;
+const float ANALOG_DELTA = 0.011;
+const float ANALOG_RANGE = 0.5;
+
+DigitalOut red = LED_RED;
+DigitalOut green = LED_GREEN;
+DigitalOut blue = LED_BLUE;
+
+// converts a voltage reading to a percent
+double getAnalogPercent(float in) {
+    return ((double)in / ANALOG_RANGE) * 100.0;   
+}
+
+// filter out garbage from the serial line
+const char* validCodes = "abcdefgh0123456789";
+bool isValidCode(char c) {
+    for (int i = 0; validCodes[i] != '\0'; i++) {
+        if (c == validCodes[i]) {
+            return true;   
+        }  
+    }
+    // pc.printf("invalid code detected: %c \r\n",c);
+    return false;
+}
+
+char ble_CODE;
+string ble_NUM_str = "";
+int ble_NUM;
+bool serialMessageAvailable = false;
+void bleCallback() {
+    if (ble_CODE == 'z') {
+        char in = ble.getc();
+        if (isValidCode(in)) {
+            ble_CODE = in;
+        } else {
+            return;
+        }
+    } else {
+        char in = ble.getc();
+        if (isValidCode(in)) {
+            ble_CODE = in;
+        } else {
+            return;
+        }
+       ble_NUM_str += ble.getc();
+    }
+    serialMessageAvailable = true;
+}
+
+int main() {
+    // servo control for Window automation
+    Servo s(D7);
+    Window window(& s, 4.0);
+    window.closeWindow();
+    
+    // status indicators
+    red = 1;
+    green = 1;
+    blue = 1;
+    
+    // motor for anemometer
+    AnalogIn motor(A0);
+    AnalogOut motorBase(PTE30);
+    motorBase.write(0.1);//(0.5);
+    string motorSpeed = "";
+    
+    // serial
+    ble.baud(9600);
+    ble.format(8,Serial::Odd,1);
+    ble.attach(bleCallback);
+
+    while(1) {        
+        // check for messages
+        if (serialMessageAvailable) {
+            switch(ble_CODE) {
+                case 'a':
+                    pc.printf("update minimum wind threshold to: ... \r\n");
+                    break;
+                case 'b':
+                    pc.printf("update maximum wind threshold to: ... \r\n");
+                    break;
+                case 'c':
+                    pc.printf("open window. \r\n");
+                    if (!window.isWindowOpen()) {
+                        window.openWindow();
+                    }
+                    break;
+                case 'd':
+                    pc.printf("close window. \r\n");
+                    if (window.isWindowOpen()) {
+                        window.closeWindow();   
+                    }
+                    break;
+                case 'e':
+                    pc.printf("initializing BLE device. \r\n");
+                    red = 0;
+                    wait(0.75);
+                    red = 1;
+                    break;
+                case 'f':
+                    pc.printf("restarting ble advertising. \r\n");
+                    break;
+                case 'g':
+                    pc.printf("current wind speed: ... \r\n");
+                    break;
+                case 'h':
+                    pc.printf("BLE device disconnected. \r\n");
+                    break;
+                default:
+                    // pc.printf("uknown code received from BLE device: %c\r\n",ble_CODE);
+                    break;
+            }
+            ble_CODE = 'z'; // flag indicating no code set
+            serialMessageAvailable = false;  
+        }
+
+        // center input at zero (no wind is blowing)
+        float val = motor.read() - ANALOG_HALF;
+        float absoluteVal = abs(val);
+        if (val < 0.0 - ANALOG_DELTA) {
+            pc.printf("motor is turning NORTH %02f percent \r\n",getAnalogPercent(absoluteVal));
+        } else if (val > 0.0 + ANALOG_DELTA) {
+            pc.printf("motor is turning SOUTH %02f percent \r\n",getAnalogPercent(absoluteVal));
+        }
+        // transmit data to BLE
+        ble.printf("%.0f",getAnalogPercent(absoluteVal));        
+                
+        wait(.5);
+    }
+}