Import Tlc5940 version r014_2

examples/UsingProgmem/UsingProgmem.pde

@@ -0,0 +1,60 @@
+/*
+    Setting grayscale from progmem to save RAM.  If you want to play
+    multiple "frames", (an animation), see the BasicAnimations Example.
+
+    See the BasicUse example for hardware setup.
+
+    Alex Leone <acleone ~AT~ gmail.com>, 2009-02-03 */
+
+#include "Tlc5940.h"
+
+// Extended functions (they start with tlc_...) require another include
+#include "tlc_progmem_utils.h"
+
+/*
+    This is an array in program memory.  Program memory is 16kB instead of
+    1024 bytes for regular variables in SRAM.
+
+    The format for this array is
+    GS_DUO(OUT15, OUT14), ... GS_DUO(OUT1, OUT0)
+
+    If you have more than one TLC, the format is
+    GS_DUO(TLC2.OUT15, TLC2.OUT14), ... GS_DUO(TLC2.OUT1, TLC2.OUT0),
+    GS_DUO(TLC1.OUT15, TLC1.OUT14), ... GS_DUO(TLC1.OUT1, TLC1.OUT0)
+
+    The pattern below will only work with 1 TLC.  Copy + Paste the 4 lines
+    inside the curly brackets for each additional TLC. */
+uint8_t gsArray1[NUM_TLCS * 24] PROGMEM = {
+  GS_DUO((4095 * 16)/16, (4095 * 15)/16), GS_DUO((4095 * 14)/16, (4095 * 13)/16),
+  GS_DUO((4095 * 12)/16, (4095 * 11)/16), GS_DUO((4095 * 10)/16, (4095 * 9)/16),
+  GS_DUO((4095 * 8)/16, (4095 * 7)/16), GS_DUO((4095 * 6)/16, (4095 * 5)/16),
+  GS_DUO((4095 * 4)/16, (4095 * 3)/16), GS_DUO((4095 * 2)/16, (4095 * 1)/16),
+};
+
+void setup()
+{
+  Tlc.init();
+}
+
+void loop()
+{
+  // Display the pattern (brightness ramp over the outputs)
+  tlc_setGSfromProgmem(gsArray1);
+  Tlc.update();
+
+  // Fade each channel to zero
+  for (TLC_CHANNEL_TYPE channel = 0; channel < NUM_TLCS * 16; channel++) {
+    int16_t initialValue = Tlc.get(channel);
+    while (initialValue > 0) {
+      initialValue -= 5;
+      if (initialValue < 0) {
+        initialValue = 0;
+      }
+      Tlc.set(channel, initialValue);
+
+      // wait until the data has been sent to the TLCs before continuing
+      while (Tlc.update());
+    }
+  }
+}
+