/**************************************************
*
* LCD1602顯示
* cpu:AVRmega16
*
* 描述:4線數(shù)據(jù)寬度，操作Lcd1602
* 在LCD1602屏幕上第一行顯示　www.goodmcu.cn
* 第二行顯示　13652037001
* 如果沒有顯示請按復(fù)位鍵，并多試幾次
*
* 調(diào)試成功（出現(xiàn)問題主要是因?yàn)長CD第3腳V0的2K接地電阻沒有接好）
*
* 硬件電路：MSP430F135核心實(shí)驗(yàn)板-I型
* 硬件連接：
*
* MSP430與LCD連接信息
* LCD1602，4位接口，即使用D4-D7數(shù)據(jù)口，D0-D3不接入MCU
* PIN1 --> 地
* PIN2 --> VCC（一定要接+5V）
* PIN3 --> 2K電阻-->地 (一定要接好，否則沒有任何顯示)
* PIN4 --> RS --> P5.0
* PIN5 --> R/W --> GND
* PIN6 --> EN --> P5.1
* PIN7 --> D0不接
* PIN8 --> D1不接
* PIN9 --> D2不接
* PIN10 --> D3不接
* PIN11 --> D4 --> P4.4
* PIN12 --> D5 --> P4.5
* PIN13 --> D6 --> P4.6
* PIN14 --> D7 --> P4.7
* PIN15 --> VCC（一定要接+5V，如果不要背光可以不接）
* PIN16 --> 地

* 調(diào)試器：MSP430FET全系列JTAG仿真器
* 調(diào)試軟件： IAR Embedded Workbench Version: 3.41A 編譯
**************************************************/

#include
#include

////管腳定義////////////////////////////////////////////////////////////////////
#define LCD_EN_PORT P5OUT //以下2個要設(shè)為同一個口
#define LCD_EN_DDR P5DIR
#define LCD_RS_PORT P5OUT //以下2個要設(shè)為同一個口
#define LCD_RS_DDR P5DIR
#define LCD_DATA_PORT P4OUT //以下3個要設(shè)為同一個口
#define LCD_DATA_DDR P4DIR //一定要用高4位
#define LCD_RS BIT0
#define LCD_EN BIT1
#define LCD_DATA BIT4|BIT5|BIT6|BIT7

////預(yù)定義函數(shù)//////////////////////////////////////////////////////////////////
void LCD_init(void);
void LCD_en_write(void);
void LCD_write_command(unsigned char command);
void LCD_write_data(unsigned char data);
void LCD_set_xy (unsigned char x, unsigned char y);
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data);
void delay_nus(unsigned int n);
void delay_nms(unsigned int n);

void main()
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog

LCD_init();
LCD_write_string(1,0,"www.goodmcu.cn");
LCD_write_string(2,1,"13652037001");
delay_nms(50);
LCD_write_command(0x01); //清屏
delay_nms(50);
LCD_write_char(2,1,'1');
delay_nms(50);
LCD_write_char(3,1,'3');
delay_nms(50);
LCD_write_char(4,1,'6');
delay_nms(50);
LCD_write_char(5,1,'5');
delay_nms(50);
LCD_write_char(6,1,'2');
delay_nms(50);
LCD_write_char(7,1,'0');
delay_nms(50);
LCD_write_char(8,1,'3');
delay_nms(50);
LCD_write_char(9,1,'7');
delay_nms(50);
LCD_write_char(10,1,'0');
delay_nms(50);
LCD_write_char(11,1,'0');
delay_nms(50);
LCD_write_char(12,1,'1');
}
//LCD液晶操作函數(shù)///////////////////////////////////////////////////////////////
//LCD1602液晶初始化
void LCD_init(void)
{
LCD_DATA_DDR|=LCD_DATA; //數(shù)據(jù)口方向?yàn)檩敵?br/>LCD_EN_DDR|=LCD_EN; //設(shè)置EN方向?yàn)檩敵?br/>LCD_RS_DDR|=LCD_RS; //設(shè)置RS方向?yàn)檩敵?br/>
LCD_write_command(0x28); //4位數(shù)據(jù)接口
delay_nus(40);
LCD_write_command(0x28); //4位顯示
LCD_write_command(0x0c); //顯示開
LCD_write_command(0x01); //清屏
delay_nms(2);
}
//液晶使能
void LCD_en_write(void)
{
LCD_EN_PORT|=LCD_EN;
delay_nus(1);
LCD_EN_PORT&=~LCD_EN;
}
//寫指令
void LCD_write_command(unsigned char command)
{
delay_nus(16);
LCD_RS_PORT&=~LCD_RS; //RS=0
LCD_DATA_PORT&=0X0f; //清高四位
LCD_DATA_PORT|=command&0xf0; //寫高四位
LCD_en_write();
command=command<<4; //低四位移到高四位
LCD_DATA_PORT&=0x0f; //清高四位
LCD_DATA_PORT|=command&0xf0; //寫低四位
LCD_en_write();
}
//寫數(shù)據(jù)
void LCD_write_data(unsigned char data)
{
delay_nus(16);
LCD_RS_PORT|=LCD_RS; //RS=1
LCD_DATA_PORT&=0X0f; //清高四位
LCD_DATA_PORT|=data&0xf0; //寫高四位
LCD_en_write();
data=data<<4; //低四位移到高四位
LCD_DATA_PORT&=0X0f; //清高四位
LCD_DATA_PORT|=data&0xf0; //寫低四位
LCD_en_write();
}
//寫地址函數(shù)
void LCD_set_xy( unsigned char x, unsigned char y )
{
unsigned char address;
if (y == 0) address = 0x80 + x;
else address = 0xc0 + x;
LCD_write_command( address);
}
//LCD在任意位置寫字符串
//列x=0~15,行y=0,1
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
{
LCD_set_xy( X, Y ); //寫地址
while (*s) // 寫顯示字符
{
LCD_write_data( *s );
s ++;
}
}
//LCD在任意位置寫字符
//列x=0~15,行y=0,1
void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data)
{
LCD_set_xy( X, Y ); //寫地址
LCD_write_data( data);
}

//延時函數(shù)//////////////////////////////////////////////////////////////////////
//1us延時函數(shù)
void delay_1us(void)
{
asm("nop");
}
//N us延時函數(shù)
void delay_nus(unsigned int n)
{
unsigned int i;
for (i=0;idelay_1us();
}
//1ms延時函數(shù)
void delay_1ms(void)
{
unsigned int i;
for (i=0;i<1140;i++);
}
//N ms延時函數(shù)
void delay_nms(unsigned int n)
{
unsigned int i=0;
for (i=0;idelay_1ms();
}