Diff: main.cpp

Revision:

2:c9b24787d5e1

Parent:

1:bf693859586c

Child:

3:dd4eb355f8d9

--- a/main.cpp	Mon Aug 21 11:43:03 2017 +0000
+++ b/main.cpp	Fri Aug 25 10:22:51 2017 +0000
@@ -3,8 +3,12 @@
 int main()
 {
     pc.baud(115200);
+    lcd_intro();
+    calibrateJoystick(); ///calibrate joystick
+    settings_menu();
     dref.rise(&voltageRise); /// set interrupt to calculate reference frequency
     setupK64Fclocks();
+    //settings_menu();
     /// initialise DAC output dac0_out
     while (ref_freq < 1e2) {
         sleep();
@@ -65,7 +69,7 @@
 double mavg_filter(int filt_points)
 {
     double avg = 0, signal = 0;
-    double delay = 0.9/(1*ref_freq*filter_points);
+    //double delay = 0.9/(1*ref_freq*filter_points);
     for (int i = 0; i < filter_points; i++) {
         signal = ain.read();
         avg = avg + signal;
@@ -158,3 +162,87 @@
         DAC0->C1 = 0; //reset DAC state
         DAC0->C0 = DAC_C0_DACEN_MASK | DAC_C0_DACSWTRG_MASK| DAC_C0_DACRFS_MASK;
 }   
+void lcd_intro()
+{
+    lcd.init();
+    lcd.setBrightness(0.7); // put LED backlight on 50%
+    lcd.printString("THE CIRCUIT IS",1,1);
+    lcd.printString("A FAST LIA!",7,3);
+    lcd.refresh();
+    Timeout timeout;
+    timeout.attach(&timeout_isr,3);
+    sleep();
+    lcd.clear();
+}
+
+void settings_menu()
+{
+    lcd.setBrightness(0.7); // put LED backlight on 50%
+    menu_ticker.attach(&menu_isr,0.2);
+
+    while (exit_menu == 0) {
+        if (g_menu_flag == 1) {
+            g_menu_flag = 0;
+            
+            updateJoystick();
+            lcd.clear();
+            
+            lcd.printString("Settings:",0,0);
+            
+            char gain_char[20]; ///create an array of chars
+            sprintf(gain_char,"Gain:%.2f",var_gain); ///create string
+            
+             char speed_char[20]; ///create an array of chars
+            sprintf(speed_char,"Speed:%.2f",var_speed); ///create string
+            
+            lcd.printString(gain_char,0,2);
+            lcd.printString(speed_char,0,3);
+            lcd.refresh();
+        }
+        sleep();
+    }
+}
+
+void menu_isr() {
+    g_menu_flag = 1;   
+}
+
+void timeout_isr() {}
+
+void calibrateJoystick()
+{
+    // must not move during calibration
+    joystick.x0 = xPot;  // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
+    joystick.y0 = yPot;
+}
+
+void updateJoystick()
+{
+    // read current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
+    joystick.x = xPot - joystick.x0;
+    joystick.y = yPot - joystick.y0;
+    // read button state
+    joystick.button = joy_button;
+
+    // calculate direction depending on x,y values
+    // tolerance allows a little lee-way in case joystick not exactly in the stated direction
+    if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
+        joystick.direction = CENTRE;
+    } else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
+        joystick.direction = UP;
+    } else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
+        joystick.direction = DOWN;
+    } else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
+        joystick.direction = RIGHT;
+    } else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
+        joystick.direction = LEFT;
+    } /*else if (joystick.y > DIRECTION_TOLERANCE  && joystick.x  < DIRECTION_TOLERANCE) {
+        joystick.direction = UP_LEFT;
+    } else if (joystick.y > DIRECTION_TOLERANCE && joystick.x > DIRECTION_TOLERANCE) {
+        joystick.direction = UP_RIGHT;
+    } else if (joystick.y < DIRECTION_TOLERANCE && joystick.x < DIRECTION_TOLERANCE) {
+        joystick.direction = DOWN_LEFT;
+    }   else if (joystick.y < DIRECTION_TOLERANCE && joystick.x > DIRECTION_TOLERANCE) {
+        joystick.direction = DOWN_RIGHT;
+    }*/
+}