Revision 0:f100451653d6, committed 2015-12-29

Comitter:

hemmer_matthias

Date:

Tue Dec 29 11:19:55 2015 +0000

Commit message:

PWM fpr LED's

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Dec 29 11:19:55 2015 +0000
@@ -0,0 +1,202 @@
+//********************************
+// Matthias Hemmer, 14.12.2015
+// Creator: Dominik Sukic 30.11.2015
+// Desing; EB 14.12.2015
+//
+// Create a PWM with delay
+// For LEDs 1 to 4 BERTL14
+//
+//**********************************
+
+
+#include "mbed.h"           // Include thbe "mbed.h" libary
+
+#define PWM_Periode 125    // Defination of the periode
+
+// Defination of LEDs
+DigitalOut Led1(P1_8);  // Name(Port)
+DigitalOut Led2(P1_9);  // Name(Port)
+DigitalOut Led3(P1_10); // Name(Port)
+DigitalOut Led4(P1_11); // Name(Port)
+
+// BEGIN pwm_delay
+// dutycycle: 0 - MAX; the brightness of the LEDs
+// on: 1 - 4; to turn each LED on
+void pwm_delay(unsigned int dutycycle, int LED_index)   //PWM underprogramm
+{
+    int PWM_time_index = 0;
+    
+    // Loop to increase PWM-Time to 1 ms (PWM_time_index x 250µs)
+    for (PWM_time_index = 0; PWM_time_index < 4; PWM_time_index++)
+    {
+        switch(LED_index)
+        {
+            case 1:     // pwm for LED1
+                Led1 = 1;
+                wait_us(dutycycle); //Time which the LED is powered
+                Led1 = 0;
+                wait_us(250-dutycycle); //Time which the LED is unpowered
+            break;
+            
+            case 2:     // pwm for LED2
+                Led2 = 1;
+                wait_us(dutycycle); //Time which the LED is powered
+                Led2 = 0;
+                wait_us(250-dutycycle); //Time which the LED is unpowered
+            break;
+            
+            case 3:     // pwm for LED3
+                Led3 = 1;
+                wait_us(dutycycle); //Time which the LED is powered
+                Led3 = 0;
+                wait_us(250-dutycycle); //Time which the LED is unpowered
+            break;
+        
+            case 4:     // pwm for LED4
+                Led4 = 1;
+                wait_us(dutycycle); //Time which the LED is powered
+                Led4 = 0;
+                wait_us(250-dutycycle); //Time which the LED is unpowered
+            break;
+            
+            default:    // if the nummber isn't listed, it woudn't crash
+                ;
+            break;
+        }
+        // End switch
+    }
+    // END for
+}
+// END pwm_delay
+
+
+// BEGIN main
+// Call pwm_delay for testing
+// all 4 Leds pwm-dimmed, phase-shifted
+int main()
+{
+    // all LEDs off
+    Led1 = 0;
+    Led2 = 0;
+    Led3 = 0;
+    Led4 = 0;
+    
+    // Initial Brightness for each LED
+    int dutycycle1 = 0; // Brightness in %
+    int dutycycle2 = 25;
+    int dutycycle3 = 50;
+    int dutycycle4 = 75;
+    
+    // Define direction of dimming
+    
+    //Bools for brighter or darker
+    bool led1_darker = false; //If false => brighter
+    bool led2_darker = false; //Wenn true => darker
+    bool led3_darker = false; 
+    bool led4_darker = false;
+
+    // central routine for triangle-dimming
+    while(1)
+    {  
+        //Led1
+        if(led1_darker == false)
+        { //False: Led is getting brighter
+            
+            if (dutycycle1 != PWM_Periode)
+            {
+            pwm_delay(dutycycle1,1); //Call the underprogramm PWM
+            dutycycle1++; //Brightness rice up
+            }
+            
+            else
+                led1_darker = true; //Led 1 = true: it will be darker
+        }
+        if(led1_darker == true)
+        { 
+            //True: Led is getting darker
+            if (dutycycle1 != 0) 
+            {
+                pwm_delay(dutycycle1,1); 
+                dutycycle1--; //brightness rice down    
+            }
+            
+            else
+                led1_darker = false; //To make it brighter
+        }
+        
+        //Repead it for each LED
+
+        //Led2 brighter
+        if(led2_darker == false) 
+        {
+            if (dutycycle2 != PWM_Periode)
+            {
+                pwm_delay(dutycycle2,2);
+                dutycycle2 ++;
+            } 
+            else
+                led2_darker = true;
+        }
+        
+        //Led2 darker
+        if(led2_darker == true) 
+        {
+            if (dutycycle2 != 0) 
+            {
+                pwm_delay(dutycycle2,2);
+                dutycycle2 --;
+            } 
+            else 
+                led2_darker = false;
+        }
+
+        //Led3 brighter       
+        if(led3_darker == false)
+         {
+            if (dutycycle3 != PWM_Periode)
+            {
+                pwm_delay(dutycycle3,3);
+                dutycycle3 ++;
+            } 
+            else 
+                led3_darker = true;
+        }
+        
+        //Led3 darker
+        if(led3_darker == true) 
+        {
+            if (dutycycle3 != 0) 
+            {
+                pwm_delay(dutycycle3,3);
+                dutycycle3 --;
+            } 
+            else 
+                led3_darker = false;
+        }
+        
+        //Led4 brighter
+        if(led4_darker == false)
+         {
+            if (dutycycle4 != PWM_Periode) 
+            {
+                pwm_delay(dutycycle4,4);
+                dutycycle4 ++;
+            } 
+            else 
+                led4_darker = true;
+        }
+        
+        //Led4 darker
+        if(led4_darker == true) 
+        {
+            if (dutycycle4 != 0) 
+            {
+                pwm_delay(dutycycle4,4);
+                dutycycle4 --;
+            } 
+            else
+                led4_darker = false;
+        }
+        
+    }   // End of While
+}   // En dof Main
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Dec 29 11:19:55 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/165afa46840b
\ No newline at end of file