Merge pull request johnrickman#8 from ortegafernando/master

Now, createChar function can use PROGMEM charmap
kalanagamage · Mar 20, 2016 · 4bb48bd · 4bb48bd
2 parents 9a4e33e + 8f29f18
commit 4bb48bd
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Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/LiquidCrystal_I2C.cpp b/LiquidCrystal_I2C.cpp
@@ -214,6 +214,15 @@ void LiquidCrystal_I2C::createChar(uint8_t location, uint8_t charmap[]) {
 	}
 }
 
+//createChar with PROGMEM input
+void LiquidCrystal_I2C::createChar(uint8_t location, const char *charmap) {
+	location &= 0x7; // we only have 8 locations 0-7
+	command(LCD_SETCGRAMADDR | (location << 3));
+	for (int i=0; i<8; i++) {
+	    	write(pgm_read_byte_near(charmap++));
+	}
+}
+
 // Turn the (optional) backlight off/on
 void LiquidCrystal_I2C::noBacklight(void) {
 	_backlightval=LCD_NOBACKLIGHT;

diff --git a/LiquidCrystal_I2C.h b/LiquidCrystal_I2C.h
@@ -77,8 +77,11 @@ class LiquidCrystal_I2C : public Print {
   void autoscroll();
   void noAutoscroll(); 
   void createChar(uint8_t, uint8_t[]);
+  void createChar(uint8_t location, const char *charmap);
+  // Example: 	const char bell[8] PROGMEM = {B00100,B01110,B01110,B01110,B11111,B00000,B00100,B00000};
+
   void setCursor(uint8_t, uint8_t); 
-#if defined(ARDUINO) && ARDUINO >= 100
+#if defined(ARDUINO) && ARDUINO >= 100
   virtual size_t write(uint8_t);
 #else
   virtual void write(uint8_t);