- /*-----------------------------------------------
- 名稱:LCD1602
- 編寫:shifang
- 日期:2009.5
- 修改:無
- 內(nèi)容:通過標準程序靜態(tài)顯示字符
- 引腳定義如下:1-VSS 2-VDD 3-V0 4-RS 5-R/W 6-E 7-14 DB0-DB7 15-BLA 16-BLK
- ------------------------------------------------*/
- #include<reg52.h> //包含頭文件,一般情況不需要改動,頭文件包含特殊功能寄存器的定義
- #include<intrins.h>
- sbit RS = P2^4; //定義端口
- sbit RW = P2^5;
- sbit EN = P2^6;
- #define RS_CLR RS=0
- #define RS_SET RS=1
- #define RW_CLR RW=0
- #define RW_SET RW=1
- #define EN_CLR EN=0
- #define EN_SET EN=1
- #define DataPort P0
- /*------------------------------------------------
- uS延時函數(shù),含有輸入?yún)?shù) unsigned char t,無返回值
- unsigned char 是定義無符號字符變量,其值的范圍是
- 0~255 這里使用晶振12M,精確延時請使用匯編,大致延時
- 長度如下 T=tx2+5 uS
- ------------------------------------------------*/
- void DelayUs2x(unsigned char t)
- {
- while(--t);
- }
- /*------------------------------------------------
- mS延時函數(shù),含有輸入?yún)?shù) unsigned char t,無返回值
- unsigned char 是定義無符號字符變量,其值的范圍是
- 0~255 這里使用晶振12M,精確延時請使用匯編
- ------------------------------------------------*/
- void DelayMs(unsigned char t)
- {
-
- while(t--)
- {
- //大致延時1mS
- DelayUs2x(245);
- DelayUs2x(245);
- }
- }
- /*------------------------------------------------
- 判忙函數(shù)
- ------------------------------------------------*/
- bit LCD_Check_Busy(void)
- {
- DataPort= 0xFF;
- RS_CLR;
- RW_SET;
- EN_CLR;
- _nop_();
- EN_SET;
- return (bit)(DataPort & 0x80);
- }
- /*------------------------------------------------
- 寫入命令函數(shù)
- ------------------------------------------------*/
- void LCD_Write_Com(unsigned char com)
- {
- while(LCD_Check_Busy()); //忙則等待
- RS_CLR;
- RW_CLR;
- EN_SET;
- DataPort= com;
- _nop_();
- EN_CLR;
- }
- /*------------------------------------------------
- 寫入數(shù)據(jù)函數(shù)
- ------------------------------------------------*/
- void LCD_Write_Data(unsigned char Data)
- {
- while(LCD_Check_Busy()); //忙則等待
- RS_SET;
- RW_CLR;
- EN_SET;
- DataPort= Data;
- _nop_();
- EN_CLR;
- }
- /*------------------------------------------------
- 清屏函數(shù)
- ------------------------------------------------*/
- void LCD_Clear(void)
- {
- LCD_Write_Com(0x01);
- DelayMs(5);
- }
- /*------------------------------------------------
- 寫入字符串函數(shù)
- ------------------------------------------------*/
- void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
- {
- if (y == 0)
- {
- LCD_Write_Com(0x80 + x); //表示第一行
- }
- else
- {
- LCD_Write_Com(0xC0 + x); //表示第二行
- }
- while (*s)
- {
- LCD_Write_Data( *s);
- s ++;
- }
- }
- /*------------------------------------------------
- 寫入字符函數(shù)
- ------------------------------------------------*/
- void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
- {
- if (y == 0)
- {
- LCD_Write_Com(0x80 + x);
- }
- else
- {
- LCD_Write_Com(0xC0 + x);
- }
- LCD_Write_Data( Data);
- }
- /*------------------------------------------------
- 初始化函數(shù)
- ------------------------------------------------*/
- void LCD_Init(void)
- {
- LCD_Write_Com(0x38); /*顯示模式設(shè)置*/
- DelayMs(5);
- LCD_Write_Com(0x38);
- DelayMs(5);
- LCD_Write_Com(0x38);
- DelayMs(5);
- LCD_Write_Com(0x38);
- LCD_Write_Com(0x08); /*顯示關(guān)閉*/
- LCD_Write_Com(0x01); /*顯示清屏*/
- LCD_Write_Com(0x06); /*顯示光標移動設(shè)置*/
- DelayMs(5);
- LCD_Write_Com(0x0C); /*顯示開及光標設(shè)置*/
- }
-
- /*------------------------------------------------
- 主函數(shù)
- ------------------------------------------------*/
- void main(void)
- {
- LCD_Init();
- LCD_Clear();//清屏
- while (1)
- {
- LCD_Write_Char(7,0,'o');
- LCD_Write_Char(8,0,'k');
- LCD_Write_String(1,1,"222222");
- while(1);
- }
- }
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