Duncan & Kieran / Mbed 2 deprecated SmartClock

Final version, with changing analogue clock colours, Friday 11:20am

Dependencies:   MMA8451Q SPI_TFT_ILI9341 TFT_fonts mbed

Smart clock by Duncan and Kieran

Photo

http://www.imgur.com/SiyOshx.jpg

Equipment

  • PCB: FRDM-KL25Z
  • TFT Color Display: MI0283QT-9A
  • Buzzer
  • 3 x buttons
  • 3 x 2kΩ resistors and 1 x 100Ω resistor
  • Stripboard
  • Wires (stranded is preferable due to their flexibility)
  • USB to Mini-USB cable, and computer

Setup

PCB to TFT (Output)

FRDM-KL25ZMI0283QT-9A
P3V33.3V, IM1, IM2, IM3
GNDRD, IM0, LEDK
PTD5CS
PTD1RS
PTD0RST
PTD2SDI
PTD3SDO
PTA13WR
P5V_USB through 100Ω resistor (approx. 20mA)LEDA

The buzzer should be connected between PTA12 and ground.

Note: The resistance between P5V_USB and LEDA can be reduced to increase the brightness of the screen. However, resistors lower than 30Ω have not been tested, and may result in the current causing damage to the PCB.

PCB to Buttons (Inputs)

FRDM-KL25ZInput
PTA5Minute button
PTC8Hour button
PTC9Time change button - toggles between changing the alarm time and the clock time

Each button should be connected in series with a 2kΩ resistor between 3.3V and 0V, so that pressing the button switches between these two voltages.

Features

  • A digital clock, displayed in 24-hour format
  • An analogue clock, displaying the time in standard 12-hour format
  • Alarm can be changed using the minute and hour buttons
  • Time can be changed by holding the third button
  • Alarm will sound for one minute at the displayed time
  • Putting the alarm on its side will snooze the alarm if the alarm is going off (or just disable it if the alarm is not sounding)

Diff: main.cpp

Revision:
7:007d23438920
Parent:
6:d80627e78bfd
Child:
8:6bd70a8697f4
--- a/main.cpp	Fri May 26 09:15:06 2017 +0000
+++ b/main.cpp	Fri May 26 09:48:57 2017 +0000
@@ -6,6 +6,9 @@
 #include "Arial24x23.h"
 #include "Arial28x28.h"
 #include "font_big.h"
+#include "MMA8451Q.h"
+
+#define MMA8451_I2C_ADDRESS (0x1d<<1)
 
 Ticker timer; // Set up a timer                         
 DigitalOut buzzer(PTE30); // Set up inputs and outputs
@@ -18,6 +21,7 @@
 int clock_minutes, clock_hours, clock_seconds = 0; // Initialise clock at 00:00.00
 int alarm_hours = 7; // Initialise alarm hours as 07
 int alarm_minutes = 0; // Initialise alarm minutes as 00 so alarm is 07:00
+int previous_state; // Initialise the previous state variable to detect changing rotation
 
 void timeup(){ // Function to increment the clock every second
     clock_seconds++; // Increment the time
@@ -70,7 +74,9 @@
 
 int main()
 {
-    wait(0.2); // Just wait for set up
+    MMA8451Q acc(PTE25, PTE24, MMA8451_I2C_ADDRESS); // Set up the accelerometer connection
+    wait(0.5); // Just wait for set up
+    previous_state = acc.getAccX() >= 0.5; // Initialise the previous state variable
      
     TFT.set_orientation(3); // Make the display horizontal
     TFT.background(Black); // Set background to black
@@ -129,8 +135,18 @@
                     break;
             }
         }
-
-        if (clock_hours == alarm_hours && clock_minutes == alarm_minutes && (clock_seconds % 2) == 0) // Check if the time is equal to the alarm time, and the seconds is even
+        
+        float x = acc.getAccX(); // Check the x-orientation
+        int enable = 1; // Initialise the enable variable
+        
+        if (x < 0.5){ // Check if the clock is tilted
+          enable = 0; // Disable the alarm
+        }
+        if (enable != previous_state && !enable && clock_hours == alarm_hours && clock_minutes == alarm_minutes) // If the clock is tilted while the alarm is going off
+        {
+            alarm_minutes += 5; // Add 5 minutes (snooze)        
+        }
+        if (clock_hours == alarm_hours && clock_minutes == alarm_minutes && (clock_seconds % 2) == 0 && enable) // Check if the time is equal to the alarm time, and the seconds is even
         {
             buzzer = 1; // Buzz
             
@@ -142,11 +158,17 @@
         TFT.foreground(White); // Set text to white
         TFT.locate(30, 70); // Move the text location
         TFT.printf("Time: %02d:%02d.%02d", clock_hours, clock_minutes, clock_seconds); // Write the time to the TFT
-
+        
+        if (enable){ // Check if the alarm is enabled
+            TFT.foreground(Green); // Write the alarm text in green
+        } else {
+            TFT.foreground(Red); // Write the alarm text in red
+        }
         TFT.locate(30, 120); // Move the text location
         TFT.printf("Alarm: %02d:%02d", alarm_hours, alarm_minutes); // Write the alarm time to the TFT
         
         drawclock(); // Call a function to draw the analogue clock
+        previous_state = enable; // Update the state to changes can be detected
     }
 
 }