Add Arduino 1602LCD Shield settings and LCD lib usage to the project

Makefile

@@ -22,7 +22,8 @@ ELF = $(BINDIR)/$(BOARD)-user-code.elf
 
 # Source files. wildard "uses" all .c files in src directory
 SRCDIR = src
-SRC = $(wildcard $(SRCDIR)/*.c)
+BUILD_LIBS_DIR = lib
+SRC = $(wildcard $(SRCDIR)/*.c $(BUILD_LIBS_DIR)/*/*.c)
 
 # Define object files from .c files defined above
 OBJ=$(SRC:.c=.o)
@@ -76,6 +77,7 @@ clean:
 #Do not remove .placeholder in BINDIR
 	find $(BINDIR) -type f -not -name '.placeholder' -print0 | xargs -0 rm -f --
 	rm -f $(SRCDIR)/*.o
+	rm -fr $(BUILD_LIBS_DIR)/*/*.o
 
 install:
 	$(AVRDUDE) $(AVRDUDEARGS) -U flash:w:$(TARGET)

lib/hd44780_111/hd44780_settings.h

@@ -0,0 +1,30 @@
+#ifndef HD44780_SETTINGS_H
+#define HD44780_SETTINGS_H
+
+#define USE_ADELAY_LIBRARY       0
+#define LCD_BITS                 4
+#define RW_LINE_IMPLEMENTED      0
+#define WAIT_MODE                0
+#define DELAY_RESET              15
+
+// Pin and port definitions for Arduino Mega 2560
+#define LCD_DB4_PORT             PORTG
+#define LCD_DB4_PIN              5
+#define LCD_DB5_PORT             PORTE
+#define LCD_DB5_PIN              3
+#define LCD_DB6_PORT             PORTH
+#define LCD_DB6_PIN              3
+#define LCD_DB7_PORT             PORTH
+#define LCD_DB7_PIN              4
+
+#define LCD_RS_PORT              PORTH
+#define LCD_RS_PIN               5
+
+#define LCD_DISPLAYS             1
+
+#define LCD_DISPLAY_LINES        2
+
+#define LCD_E_PORT               PORTH
+#define LCD_E_PIN                6
+
+#endif /* HD44780_SETTINGS_H */