Enhance the HotmailNotifier project so that the LEDs' individual brightness can be controlled individually via software PWM.

2 files changed, 84 insertions, 24 deletions

diff --git a/Projects/HotmailNotifier/HotmailNotifier.c b/Projects/HotmailNotifier/HotmailNotifier.c
index 3d467e54a..5a7ebd563 100644
--- a/Projects/HotmailNotifier/HotmailNotifier.c
+++ b/Projects/HotmailNotifier/HotmailNotifier.c
@@ -60,6 +60,39 @@ USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
 			},

 	};

 

+/** Counter for the software PWM */

+static volatile uint8_t SoftPWM_Count;

+

+/** Duty cycle for the first software PWM channel */

+static volatile uint8_t SoftPWM_Channel1_Duty;

+

+/** Duty cycle for the second software PWM channel */

+static volatile uint8_t SoftPWM_Channel2_Duty;

+

+/** Duty cycle for the third software PWM channel */

+static volatile uint8_t SoftPWM_Channel3_Duty;

+

+

+/** Interrupt handler for managing the software PWM channels for the LEDs */

+ISR(TIMER0_COMPA_vect, ISR_BLOCK)

+{

+	uint8_t LEDMask = LEDS_ALL_LEDS;

+

+	if (++SoftPWM_Count == 0x1F)

+	  SoftPWM_Count = 0;

+

+	if (SoftPWM_Count >= SoftPWM_Channel1_Duty)

+	  LEDMask &= ~LEDS_LED1;

+

+	if (SoftPWM_Count >= SoftPWM_Channel2_Duty)

+	  LEDMask &= ~LEDS_LED2;

+

+	if (SoftPWM_Count >= SoftPWM_Channel3_Duty)

+	  LEDMask &= ~LEDS_LED3;

+	  

+	LEDs_SetAllLEDs(LEDMask);

+}

+

 /** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be

  *  used like any regular character stream in the C APIs

  */

@@ -77,11 +110,21 @@ int main(void)
 

 	for (;;)

 	{

-		/* Read next character - if a '1' turn on red led, if a '0' turn on green LED */

-		if (fgetc(&USBSerialStream) == '1')

-		  LEDs_SetAllLEDs(LEDS_LED3);

-		else

-		  LEDs_SetAllLEDs(LEDS_LED2);

+		/* Read in next LED colour command from the host */

+		uint8_t ColorUpdate = fgetc(&USBSerialStream);

+		

+		/* Top 3 bits select the LED, bottom three control the brightness */

+		uint8_t Channel = (ColorUpdate & 0b11100000);

+		uint8_t Duty    = (ColorUpdate & 0b00011111);

+		

+		if (Channel & (1 << 5))

+		  SoftPWM_Channel1_Duty = Duty;

+		

+		if (Channel & (1 << 6))

+		  SoftPWM_Channel2_Duty = Duty;

+
+		if (Channel & (1 << 7))

+		  SoftPWM_Channel3_Duty = Duty;

 

 		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);

 		USB_USBTask();

@@ -101,15 +144,18 @@ void SetupHardware(void)
 	/* Hardware Initialization */

 	LEDs_Init();

 	USB_Init();

+	

+	/* Timer Initialization */

+	OCR0A  = 100;

+	TCCR0A = (1 << WGM01);

+	TCCR0B = (1 << CS00);

+	TIMSK0 = (1 << OCIE0A);

 }

 

 /** Event handler for the library USB Configuration Changed event. */

 void EVENT_USB_Device_ConfigurationChanged(void)

 {

-	LEDs_SetAllLEDs(LEDS_ALL_LEDS);

-

-	if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))

-	  	LEDs_SetAllLEDs(LEDS_LED1 | LEDS_LED3);

+	CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);

 }

 

 /** Event handler for the library USB Unhandled Control Request event. */

diff --git a/Projects/HotmailNotifier/WindowsApp/MailNotifier.cs b/Projects/HotmailNotifier/WindowsApp/MailNotifier.cs
index d7f051687..742948fca 100644
--- a/Projects/HotmailNotifier/WindowsApp/MailNotifier.cs
+++ b/Projects/HotmailNotifier/WindowsApp/MailNotifier.cs
@@ -12,18 +12,20 @@ namespace TestWinForms
     public partial class MailNotifier : Form

     {

         private MessengerAPI.Messenger Messenger;

-		private RegistryKey AppRegKey;

+        private RegistryKey AppRegKey;

+

+        private const int LIGHT_MAX = 0x1F;

 

         public MailNotifier()

         {

             InitializeComponent();

 

             Messenger = new MessengerAPI.Messenger();

-			AppRegKey = Registry.CurrentUser.CreateSubKey("Software\\MailNotifier");

+            AppRegKey = Registry.CurrentUser.CreateSubKey("Software\\MailNotifier");

 

             for (int i = 1; i < 99; i++)

                 cmbComPort.Items.Add("COM" + i.ToString());

-           

+

             cmbComPort.SelectedIndex = System.Convert.ToInt32(AppRegKey.GetValue("Port", "1")) - 1;

             serSerialPort.PortName = cmbComPort.Text;

 

@@ -34,7 +36,9 @@ namespace TestWinForms
         private void MailNotifier_Load(object sender, EventArgs e)

         {

             Messenger.OnUnreadEmailChange += new MessengerAPI.DMessengerEvents_OnUnreadEmailChangeEventHandler(NewEmail);

-            NotifyLight(Messenger.get_UnreadEmailCount(MessengerAPI.MUAFOLDER.MUAFOLDER_INBOX) > 0);

+

+            bool UnreadMail = (Messenger.get_UnreadEmailCount(MessengerAPI.MUAFOLDER.MUAFOLDER_INBOX) > 0);

+            NotifyLight((!UnreadMail ? LIGHT_MAX : 0), (UnreadMail ? LIGHT_MAX : 0), 0);

 

             Hide();

         }

@@ -48,18 +52,23 @@ namespace TestWinForms
         private void NewEmail(MessengerAPI.MUAFOLDER folder, int amount, ref bool enableDefault)

         {

             if (folder == MessengerAPI.MUAFOLDER.MUAFOLDER_INBOX)

-                NotifyLight(amount > 0);

+            {

+                bool UnreadMail = (Messenger.get_UnreadEmailCount(MessengerAPI.MUAFOLDER.MUAFOLDER_INBOX) > 0);

+                NotifyLight((!UnreadMail ? LIGHT_MAX : 0), (UnreadMail ? LIGHT_MAX : 0), 0);

+            }

         }

 

-        private void NotifyLight(bool ShowGreen)

+        private void NotifyLight(int Red, int Green, int Blue)

         {

-            char[] buffer = new char[1];

-            buffer[0] = ShowGreen ? '0' : '1';

+            byte[] buffer = new byte[3];

+            buffer[0] = (byte)(0x80 | (Red & LIGHT_MAX));

+            buffer[1] = (byte)(0x40 | (Green & LIGHT_MAX));

+            buffer[2] = (byte)(0x20 | (Blue & LIGHT_MAX));

 

             try

             {

                 serSerialPort.Open();

-                serSerialPort.Write(buffer, 0, 1);

+                serSerialPort.Write(buffer, 0, buffer.Length);

                 serSerialPort.Close();

             }

             catch (Exception e)

@@ -78,15 +87,20 @@ namespace TestWinForms
             AppRegKey.SetValue("Port", cmbComPort.SelectedIndex + 1);

             serSerialPort.PortName = cmbComPort.Text;

 

-            for (int i = 0; i < 5; i++)

+            for (int i = 1; i < 10; i++)

+            {

+                NotifyLight((LIGHT_MAX / i), (LIGHT_MAX / (i * 10)), 0);

+                System.Threading.Thread.Sleep(10);

+            }

+

+            for (int i = 10; i > 0; i--)

             {

-                NotifyLight(true);

-                System.Threading.Thread.Sleep(20);

-                NotifyLight(false);

-                System.Threading.Thread.Sleep(20);

+                NotifyLight((LIGHT_MAX / i), (LIGHT_MAX / (i * 10)), 0);

+                System.Threading.Thread.Sleep(10);

             }

 

-            NotifyLight(Messenger.get_UnreadEmailCount(MessengerAPI.MUAFOLDER.MUAFOLDER_INBOX) > 0);

+            bool UnreadMail = (Messenger.get_UnreadEmailCount(MessengerAPI.MUAFOLDER.MUAFOLDER_INBOX) > 0);

+            NotifyLight((!UnreadMail ? LIGHT_MAX : 0), (UnreadMail ? LIGHT_MAX : 0), 0);

         }

 

         private void btnMinimize_Click(object sender, EventArgs e)