init

rom.c

@@ -0,0 +1,38 @@
+static unsigned short* lcd = (unsigned short*)0xf00100;
+
+static void lcd_wait(void){	
+	while(lcd[1] & (1 << 7));
+}
+
+static void lcd_cmd(unsigned char cmd){
+	lcd[0] = cmd;
+	lcd_wait();
+}
+
+static void lcd_data(unsigned char c){
+	lcd[1] = c;
+	lcd_wait();
+}
+
+static void lcd_print(const char* str){
+	int i;
+
+	for(i = 0; str[i] != 0; i++) lcd_data(str[i]);
+}
+
+#define LCD_DISPLAY (1 << 3)
+#define LCD_DISPLAY_ON (1 << 2)
+
+#define LCD_FUNCTION (1 << 5)
+#define LCD_FUNCTION_8_BITS (1 << 4)
+#define LCD_FUNCTION_2_LINES (1 << 3)
+
+int main(void){
+	lcd_cmd(LCD_FUNCTION | LCD_FUNCTION_8_BITS | LCD_FUNCTION_2_LINES);
+	lcd_cmd(LCD_DISPLAY | LCD_DISPLAY_ON);
+
+	lcd_print("Hello, world!");
+}
+
+void tick(void){
+}