Updates for current Arduino IDE

Fixes bugs with AVR PROGMEM changes in Arduino IDE 1.6 or later.  Tested
with Arduino 1.8.2 and Sparkfun TLC5940 breakout.  Details at
https://github.com/arduino/Arduino/wiki/1.6-Frequently-Asked-Questions#errors-related-to-avr-progmem-changes

examples/BasicAnimations/ani_arduino.h

@@ -1,5 +1,5 @@
 #define  ANI_ARDUINO_FRAMES  80
-uint8_t ani_arduino[NUM_TLCS * 24 * ANI_ARDUINO_FRAMES] PROGMEM = {
+const uint8_t ani_arduino[NUM_TLCS * 24 * ANI_ARDUINO_FRAMES] PROGMEM = {
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16,6,176,206,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16,65,10,64,247,15,240,255,
   0,0,0,0,0,0,0,0,0,0,0,0,1,160,122,13,192,255,15,240,254,11,192,89,

tlc_animations.h

@@ -30,7 +30,7 @@
 #include "tlc_progmem_utils.h"
 
 /** The currently playing animation */
-prog_uint8_t *tlc_currentAnimation;
+const uint8_t *tlc_currentAnimation;
 /** The number of frames in the current animation */
 volatile uint16_t tlc_animationFrames;
 /** The number of PWM periods to display each frame - 1 */
@@ -39,11 +39,11 @@ volatile uint16_t tlc_animationPeriodsPerFrame;
 volatile uint16_t tlc_animationPeriodsWait;
 
 volatile void tlc_animationXLATCallback(void);
-void tlc_playAnimation(prog_uint8_t *animation, uint16_t frames, uint16_t periodsPerFrame);
+void tlc_playAnimation(const uint8_t PROGMEM *animation, uint16_t frames, uint16_t periodsPerFrame);
 
 /** \addtogroup ExtendedFunctions
     \code #include "tlc_animations.h" \endcode
-    - void tlc_playAnimation(prog_uint8_t *animation, uint16_t frames,
+    - void tlc_playAnimation(const uint8_t PROGMEM *animation, uint16_t frames,
             uint16_t periodsPerFrame) - plays an animation from progmem. */
 /* @{ */
 
@@ -55,7 +55,7 @@ void tlc_playAnimation(prog_uint8_t *animation, uint16_t frames, uint16_t period
     \param periodsPerFrame number of PWM periods to wait between each frame
            (0 means play the animation as fast as possible).
            The default PWM period for a 16MHz clock is 1.024ms. */
-void tlc_playAnimation(prog_uint8_t *animation, uint16_t frames, uint16_t periodsPerFrame)
+void tlc_playAnimation(const uint8_t PROGMEM *animation, uint16_t frames, uint16_t periodsPerFrame)
 {
     tlc_currentAnimation = animation;
     tlc_animationFrames = frames;

tlc_progmem_utils.h

@@ -26,17 +26,17 @@
 #include "Tlc5940.h"
 #include "pinouts/pin_functions.h"
 
-void tlc_setGSfromProgmem(prog_uint8_t *gsArray);
+void tlc_setGSfromProgmem(const uint8_t PROGMEM *gsArray);
 #if VPRG_ENABLED
-void tlc_setDCfromProgmem(prog_uint8_t *dcArray);
+void tlc_setDCfromProgmem(const uint8_t PROGMEM *dcArray);
 #endif
 
 /** \addtogroup ExtendedFunctions
     \code #include "tlc_progmem_utils.h" \endcode
-    - void tlc_setGSfromProgmem(prog_uint8_t *gsArray) - copies the progmem
+    - void tlc_setGSfromProgmem(const uint8_t PROGMEM *gsArray) - copies the progmem
       grayscale to current grayscale array.  Requires a
       \link Tlc5940::update Tlc.update() \endlink.
-    - void tlc_setDCfromProgmem(prog_uint8_t *dcArray) - shifts the data from a
+    - void tlc_setDCfromProgmem(const uint8_t PROGMEM *dcArray) - shifts the data from a
       progmem dot correction array (doesn't need an update). */
 /* @{ */
 
@@ -44,7 +44,7 @@ void tlc_setDCfromProgmem(prog_uint8_t *dcArray);
     any data: call Tlc.update().  An example:
     \code
 #include "tlc_progmem_utils.h"
-prog_uint8_t gsArray1[NUM_TLCS * 24] = {
+const uint8_t PROGMEM gsArray1[NUM_TLCS * 24] = {
   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),
@@ -62,9 +62,9 @@ Tlc.update();
     The format of the grayscale array is explained in #tlc_GSData.
 
     \param gsArray A progmem array of grayscale data. */
-void tlc_setGSfromProgmem(prog_uint8_t *gsArray)
+void tlc_setGSfromProgmem(const uint8_t PROGMEM *gsArray)
 {
-    prog_uint8_t *gsArrayp = gsArray;
+    const uint8_t PROGMEM *gsArrayp = gsArray;
     uint8_t *gsDatap = tlc_GSData;
     while (gsDatap < tlc_GSData + NUM_TLCS * 24) {
         *gsDatap++ = pgm_read_byte(gsArrayp++);
@@ -78,14 +78,14 @@ void tlc_setGSfromProgmem(prog_uint8_t *gsArray)
 
 /** \addtogroup ReqVPRG_ENABLED
     From tlc_progmem_utils.h:
-    - tlc_setDCfromProgmem(prog_uint8_t *dcArray) - shifts the data from a
+    - tlc_setDCfromProgmem(const uint8_t PROGMEM *dcArray) - shifts the data from a
       progmem dot correction array (doesn't need an update). */
 /* @{ */
 
 /** Sets the dot correction data from an array in progmem.  An example:
     \code
 #include "tlc_progmem_utils.h"
-prog_uint8_t dcArray1[NUM_TLCS * 12] = {
+const uint8_t PROGMEM dcArray1[NUM_TLCS * 12] = {
   DC_QUARTET(32, 63, 32, 63), DC_QUARTET(32, 63, 32, 63),
   DC_QUARTET(32, 63, 32, 63), DC_QUARTET(32, 63, 32, 63),
 };
@@ -103,12 +103,12 @@ tlc_setDCfromProgmem(dcArray1);
 
     \param dcArray A progmem array of dot correction data to be shifted out.
     \see \link Tlc5940::setAllDC Tlc.setAllDC \endlink */
-void tlc_setDCfromProgmem(prog_uint8_t *dcArray)
+void tlc_setDCfromProgmem(const uint8_t PROGMEM *dcArray)
 {
     tlc_dcModeStart();
 
-    prog_uint8_t *p = dcArray;
+    const uint8_t PROGMEM *p = dcArray;
-    prog_uint8_t *dcArrayEnd = dcArray + NUM_TLCS * 12;
+    const uint8_t PROGMEM *dcArrayEnd = dcArray + NUM_TLCS * 12;
     while (p < dcArrayEnd) {
         tlc_shift8(pgm_read_byte(p++));
     }