/************************************************************/
/*		         3310 Code for   M32L					    */
/*				   By   pasyong								*/
/*				   2006-4									*/
/*				   Base ICC6.31A					        */
/************************************************************/
#include <iom32v.h>
#include <macros.h>
#include "english_6x8_pixel.h"

#define LCD_PORT        PORTC
#define LCD_DC          BIT(0)  
#define LCD_CE          BIT(1)  
#define LCD_RST         BIT(2) 
 
void delay_1us(void)                 //1us延時函數
  {
   asm("nop");
  }
 
void lcd_port()
{
DDRC=0x03;
PORTC|=LCD_CE|LCD_DC;
DDRD=0xff;
PORTC|=LCD_RST;
}
/*-----------------------------------------------------------------------
LCD_write_byte    : 使用SPI接口寫數據到LCD

輸入參數：data    ：寫入的數據；
          command ：寫數據/命令選擇；
-----------------------------------------------------------------------*/
void LCD_write_byte(unsigned char data, unsigned char command)
  {
    LCD_PORT&= ~LCD_CE ;		        // 使能LCD
    
    if (command == 0)
      {
	  LCD_PORT&= ~LCD_DC ;        // 傳送命令
	  }
    else
      {
	  LCD_PORT|= LCD_DC ;		        // 傳送數據
	  }

    SPDR = data;			// 傳送數據到SPI寄存器

    while ((SPSR & 0x80) == 0);         // 等待數據傳送完畢
	
    LCD_PORT|= LCD_CE ;			// 關閉LCD
  }
/*-----------------------------------------------------------------------
LCD_set_XY        : 設置LCD坐標函數

輸入參數：X       ：0－83
          Y       ：0－5
-----------------------------------------------------------------------*/
void LCD_set_XY(unsigned char X, unsigned char Y)
  {
    LCD_write_byte(0x40 | Y, 0);		// column
    LCD_write_byte(0x80 | X, 0);          	// row
  }

/*-----------------------------------------------------------------------
LCD_write_char    : 顯示英文字符

輸入參數：c       ：顯示的字符；
-----------------------------------------------------------------------*/
void LCD_write_char(unsigned char c)
  {
    unsigned char line;
    c -= 32;
    for (line=0; line<6; line++)
      LCD_write_byte(font6x8[c][line], 1);
  }
/*-----------------------------------------------------------------------
LCD_write_english_String  : 英文字符串顯示函數

輸入參數：*s      ：英文字符串指針；
          X、Y    : 顯示字符串的位置,x 0-83 ,y 0-5	
-----------------------------------------------------------------------*/
void LCD_write_english_string(unsigned char X,unsigned char Y,char *s)
  {
    LCD_set_XY(X,Y);
    while (*s) 
      {
	 LCD_write_char(*s);
	 s++;
      }
  }
/*-----------------------------------------------------------------------
LCD_clear         : LCD清屏函數
-----------------------------------------------------------------------*/
void LCD_clear(void)
  {
    unsigned int i;

    LCD_write_byte(0x0c, 0);	//普通顯示模式		
    LCD_write_byte(0x80, 0);    //設置RAM的X地址	

    for (i=0; i<504; i++)
      LCD_write_byte(0, 1);		//寫0數據	
  }
/*-----------------------------------------------------------------------
LCD_init          : 3310LCD初始化
-----------------------------------------------------------------------*/
void LCD_init(void)
  {
    PORTD &= ~LCD_RST;          // 產生一個讓LCD復位的低電平脈沖
    delay_1us();
    PORTD |= LCD_RST;
    delay_1us();
    LCD_write_byte(0x21, 0);	// 使用擴展命令設置LCD模式
    LCD_write_byte(0xc8, 0);	// 設置偏置電壓
    LCD_write_byte(0x06, 0);	// 溫度校正
    LCD_write_byte(0x13, 0);	// 1:48
    delay_1us();
    LCD_write_byte(0x20, 0);	// 使用基本命令
    LCD_clear();	            // 清屏
    LCD_write_byte(0x0c, 0);	// 設定顯示模式，正常顯示    
  }