From 9771416756fdd5f41e9e4bf4c38dc896dd6fb4fe Mon Sep 17 00:00:00 2001
From: Stefan Rupp <struppi@struppi.name>
Date: Sat, 1 Mar 2014 18:34:19 +0100
Subject: [PATCH] adjusted lcd.c to match this board

---
 lcd.c | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/lcd.c b/lcd.c
index 1a273aa..f575d97 100644
--- a/lcd.c
+++ b/lcd.c
@@ -16,18 +16,31 @@
 #include "timer.h"
 #include "lcd.h"
 
+//#define WAIT_250_ns()       _delay_us(1)
+#if (F_CPU <= 4000000UL)
 #define WAIT_250_ns()       _NOP()
+#elif (F_CPU <= 8000000UL)
+#define WAIT_250_ns()       _NOP();_NOP()
+#elif (F_CPU <= 12000000UL)
+#define WAIT_250_ns()       _NOP();_NOP();_NOP()
+#elif (F_CPU <= 16000000UL)
+#define WAIT_250_ns()       _NOP();_NOP();_NOP();_NOP()
+#elif (F_CPU <= 20000000UL)
+#define WAIT_250_ns()       _NOP();_NOP();_NOP();_NOP();_NOP()
+#else
+#include <util/delay.h>
+#define WAIT_250_ns()       _delay_us(1)
+#endif
 
-#define LCD_DATA_MODE()     (PORTC |=  (1<<PC4))
-#define LCD_CMD_MODE()      (PORTC &= ~(1<<PC4))
+#define LCD_DATA_MODE()     (PORTD |=  (1<<PD6))
+#define LCD_CMD_MODE()      (PORTD &= ~(1<<PD4))
 
-#define LCD_SET_ENABLE()    (PORTC |=  (1<<PC5))
-#define LCD_RESET_ENABLE()  (PORTC &= ~(1<<PC5))
+#define LCD_SET_ENABLE()    (PORTD |=  (1<<PD5))
+#define LCD_RESET_ENABLE()  (PORTD &= ~(1<<PD5))
 
 // !!!!!!!
-#define LCD_SET_READ()      DDRC &= ~(0x0f);PORTC &= ~(0x0f);PORTB |= (1<<PB0)
-#define LCD_SET_WRITE()     PORTB &= ~(1<<PB0);DDRC |= 0x0f
-#define LCD_BUSY_FLAG       (0x80)
+#define LCD_SET_READ()      DDRA &= ~(0x0f);PORTA &= ~(0x0f);PORTD |= (1<<PD7)
+#define LCD_SET_WRITE()     PORTD &= ~(1<<PD7);DDRA |= 0x0f
 // !!!!!!!
 
 
@@ -45,7 +58,7 @@ static inline uint8_t lcd_read_byte(uint8_t RS)
   
   LCD_SET_ENABLE();
   WAIT_250_ns();
-  byte = (PINC<<4);
+  byte = (PINA<<4);
   LCD_RESET_ENABLE();
   
   WAIT_250_ns();
@@ -53,7 +66,7 @@ static inline uint8_t lcd_read_byte(uint8_t RS)
   
   LCD_SET_ENABLE();
   WAIT_250_ns();
-  byte |= PINC & 0x0f;
+  byte |= PINA & 0x0f;
   LCD_RESET_ENABLE();
   
   return byte;  
@@ -66,7 +79,7 @@ static inline void lcd_wait_while_busy(void)
   uint8_t byte;
   do {
     byte = lcd_read_byte(0);
-  } while (byte & LCD_BUSY_FLAG);
+  } while (byte & 0x80);
   return;
 }
 
@@ -74,7 +87,7 @@ static inline void lcd_wait_while_busy(void)
 static inline void send_nibble(uint8_t nibble)
 {
   LCD_SET_WRITE();
-  PORTC = (PORTC & 0xf0) | (0x0f & nibble);
+  PORTA = (PORTA & 0xf0) | (0x0f & nibble);
   LCD_SET_ENABLE();
   WAIT_250_ns();
   LCD_RESET_ENABLE();
@@ -136,7 +149,7 @@ void lcd_cursor(uint8_t blink)
 
 void lcd_init(void)
 {
-  /* Initialize both ATmega and Dsiplay
+  /* Initialize both ATmega and Display
    * After return from this function,
    * display we be set to 4-bit data mode
    */