1 files changed, 45 insertions, 5 deletions
diff --git a/include/lcd.h b/include/lcd.h
index 441d463..378aac4 100644
--- a/include/lcd.h
+++ b/include/lcd.h
@@ -1,23 +1,63 @@
+/**
+ * @file lcd.h
+ * A basic library for writing a 16x2 text LCD.
+ */
+
 #ifndef LCD_H_
 #define LCD_H_
 
 #include <stdint.h>
 
 /**
- * Direct access
+ * A handler/task to manage asyncronous LCD writes.
+ */
+void lcd_handler(void);
+
+/**
+ * Writes a string asyncronously to the LCD.
+ * The lcd_handler task must be running for the string to actually be printed.
+ * @param s the string to write
+ */
+void lcd_put(const char *s);
+
+//
+// The following functions do not support asyncronous calls.
+//
+
+/**
+ * Initializes the LCD.
  */
 void lcd_init(void);
 
+/**
+ * Writes a string to the LCD.
+ * A cursor position is kept internally. When the end of the screen is reached,
+ * writing resumes at the first position.
+ * @param s the string to write
+ */
 void lcd_puts(const char *s);
+
+/**
+ * Writes a base 10 integer to the screen.
+ * @param i the integer to print
+ */
 void lcd_puti(int i);
+
+/**
+ * Writes a base 16 integer to the screen.
+ * @param h the integer to print
+ */
 void lcd_puth(int h);
+
+/**
+ * Writes a byte in binary to the screen.
+ * @param b the byte to print
+ */
 void lcd_putb(uint8_t b);
-void lcd_clear(void);
 
 /**
- * Buffered/async access
+ * Clears the LCD.
  */
-void lcd_handler(void);
-void lcd_put(const char *s);
+void lcd_clear(void);
 
 #endif // LCD_H_