Import Tlc5940 version r014_2

examples/FadeScope/FadeScope.pde

@@ -0,0 +1,45 @@
+/*
+    A simple 1-d oscilliscope: scan all the channels, setting the PWM output
+    value to 4x the analog pin 0 value (0 - 1024 * 4 = 4096).  The value will
+    fade to zero as the channels keep scanning.
+
+    See the BasicUse example for hardware setup.
+
+    Alex Leone <acleone ~AT~ gmail.com>, 2009-02-03 */
+
+#include "Tlc5940.h"
+#include "tlc_fades.h"
+
+// which analog pin to use
+#define ANALOG_PIN      0
+
+// how many millis to strobe over all the LEDs
+#define SCOPE_PERIOD    (1000 * NUM_TLCS)
+#define LED_PERIOD      SCOPE_PERIOD / (NUM_TLCS * 16)
+
+TLC_CHANNEL_TYPE channel;
+
+void setup()
+{
+  Tlc.init();
+}
+
+void loop()
+{
+  uint32_t lastMillis = millis();
+  tlc_addFade(channel,                      // led channel
+              analogRead(ANALOG_PIN) * 4,   // start fade value (0-4095)
+              0,                            // end fade value (0-4095)
+              lastMillis + 2,               // start millis
+              lastMillis + (uint16_t)SCOPE_PERIOD / 4  // end millis
+             );
+  if (channel++ == NUM_TLCS * 16) {
+    channel = 0;
+  }
+  uint32_t currentMillis;
+  do {
+    currentMillis = millis();
+    tlc_updateFades(currentMillis);
+  } while (currentMillis - lastMillis <= LED_PERIOD);
+}
+