logic analyzer for PWM

[sketchbook_andrea] / advanced_projects / led_PWM_logical_analyzer_demo / led_PWM_logical_analyzer_demo.ino

diff --git a/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino b/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino
new file mode 100644 (file)
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--- /dev/null
+++ b/advanced_projects/led_PWM_logical_analyzer_demo/led_PWM_logical_analyzer_demo.ino
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+/*
+    PWM demo with a logical analyzer
+ 
+ Connect pin ~11 to a logic analyzer and a multimeter
+ and witness the power of the built-in PWM generator.
+ 
+ BTW: Logic comes from: http://downloads.saleae.com/betas/1.1.34/Logic+1.1.34+(64-bit).zip
+ */
+
+int led = 11;
+int c = 0;
+
+
+void setup()
+{
+  pinMode(led, OUTPUT);
+  delay(5000);
+
+}
+
+void loop()
+{  
+  // Static test value, comment exit() or ad a delay()
+  //analogWrite(led, 0) ; // No light
+  //delay(20)
+  //analogWrite(led, 254) ;  // Full light
+  //delay(20)
+  //analogWrite(led, 63) ;   // 1/4
+  //delay(20)
+  //analogWrite(led, 127) ;  // 1/2
+  //delay(20)
+  //analogWrite(led, 191) ;  // 3/4
+  //delay(20)
+  //return ;
+  
+  for ( c = 0; c < 255 ; c++) {
+    analogWrite(led, c) ;
+    delay(2 );
+  }
+  exit(0);
+
+}
+
+
+
+