1602显示._c

ISD1720芯片实现录音,定点录音,播放,定点播放等.

#include <iom16v.h>
#include <macros.h>

//定义MCU与LCD的接口
#define LCD_EN_PORT    PORTC
#define LCD_RW_PORT    PORTC  
#define LCD_RS_PORT    PORTC
#define LCD_DATA_PORT  PORTA
#define LCD_DATA_DDR   DDRA
#define LCD_DATA_PIN   PINA

#define LCD_EN         0x80   //portC7         out
#define LCD_RW         0x40   //portC6         out/in
#define LCD_RS         0x20   //portC5         out
#define LCD_DATA       0xf0   //porta4/5/6/7   out

/*-----------------------------------------------------------------------
延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
void delay_1us(void)                 //1us延时函数
  {
   asm("nop");
  }

void delay_nus(unsigned int n)       //N us延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1us();
  }
  
void delay_1ms(void)                 //1ms延时函数
  {
   unsigned int i;
   for (i=0;i<1140;i++);
  }
  
void delay_nms(unsigned int n)       //N ms延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
  }

/*--------------------------------------------------------------------------------------------------
Public function prototypes
--------------------------------------------------------------------------------------------------*/
void LCD_init(void);
void LCD_en_write(void);
void LCD_write_char(unsigned command,unsigned data);
void LCD_wait_Ready(void);
void LCD_set_xy(unsigned char x, unsigned char y);
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);
void delay_nus(unsigned int n);
void delay_nms(unsigned int n);

/**********************************************************
光标命令
LCD_write_char(0x0e,0);    //光标开
LCD_write_char(0x0d,0);    //光标所在字符闪烁  
LCD_write_char(0x0c,0);    //光标关  
**********************************************************/
/**********************************************************
TC1602B LCD DISPLAY
LCD_write函数功能：当command＝0时，向LCD写入数据，否则向LCD写
                   入命令
LCD第一行显示寄存器地址：0X80-0X8F
LCD第二行显示寄存器地址：0XC0-0XCF
**********************************************************/
void LCD_init(void)
  {
   	DDRA=0XFF;			//设置PA输出
	PORTA=0XFF;			//全部加上上拉电阻
	DDRC=0XFF;			//设置PC为输出
	PORTC=0XFF;			//全部加上上拉电阻
	delay_nms(15);
    LCD_write_char(0x28,0);      //4bit test
    LCD_write_char(0x0c,0);      //显示开
    LCD_write_char(0x01,0);      //显示清屏
    LCD_write_char(0x06,0);      //显示光标移动设置
  }

void LCD_en_write(void)        //EN端产生一个高电平脉冲，写LCD
  {
    LCD_EN_PORT |= LCD_EN;
    delay_nus(1);
    LCD_EN_PORT &= ~LCD_EN;
  }

/*-----------------------------------------------------------------------
LCD_write_char    : 英文字符串显示函数

输入参数：*s      ：英文字符串指针；
          X、Y    : 显示字符串的位置，X:0-15，Y:0-1
                    LCD第一行显示寄存器地址：0X80-0X8F
                    LCD第一行显示寄存器地址：0XC0-0XCF
-----------------------------------------------------------------------*/
void LCD_write_char(unsigned command,unsigned data)
  {
    unsigned command_temp,data_temp;        
    command_temp = command;
    data_temp = data;
    LCD_wait_Ready();
    LCD_RW_PORT &= ~LCD_RW;                 //RW=0
    if (command == 0)
      {
     LCD_RS_PORT |= LCD_RS;             //RS=1 
     LCD_DATA_PORT &= 0X0F;
  LCD_DATA_PORT|= data_temp&0xf0;   //send high 4bit   gai f
      }
    else 
      {
  LCD_RS_PORT &= ~LCD_RS;            //RS=0
  LCD_DATA_PORT &= 0X0F;          
         LCD_DATA_PORT |= command_temp&0xf0;//send high 4bit   gai f
      }
    LCD_en_write();
    command_temp=command_temp << 4;         //send low 4bit
    data_temp=data_temp       << 4;
    LCD_DATA_PORT &= 0X0F;
    if (command==0)
      LCD_DATA_PORT |= data_temp&0xf0;
    else
      LCD_DATA_PORT |= command_temp&0xf0;
    LCD_en_write();
    LCD_RW_PORT |= LCD_RW;
    LCD_RS_PORT ^= LCD_RS;    
  }

void LCD_wait_Ready(void)                  //等待LCD空闲
  {
    LCD_DATA_DDR &= ~0x80;                 //PA7 I/O口方向设置为输入   
    LCD_RW_PORT |= LCD_RW;                 //RW=1
    LCD_RS_PORT &= ~LCD_RS;                //RS=0
    LCD_EN_PORT |= LCD_EN;                 //EN=1
    while (!( LCD_DATA_PIN&0x80 ) == 0);   //RW=1,读PA7，为0表示空闲；
    LCD_EN_PORT &= ~LCD_EN;                //EN=0
    LCD_DATA_DDR |= 0xf0;
  }

/*-----------------------------------------------------------------------
LCD_set_xy        : 设置LCD显示的起始位置

输入参数：x、y    : 显示字符串的位置，X:0-15，Y:0-1
                    LCD第一行显示寄存器地址：0X80-0X8F
                    LCD第一行显示寄存器地址：0XC0-0XCF
-----------------------------------------------------------------------*/
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_char( address, 0 );
  }
/*-----------------------------------------------------------------------
LCD_write_string  : 英文字符串显示函数
LCD_write_dan_data:显示0~10内的单个十进制数
LCD_write_chang_dat:显示0~4294967295内的任意一个数
输入参数：*s      ：英文字符串指针；
          X、Y    : 显示字符串的位置 
-----------------------------------------------------------------------*/
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
  {
    LCD_set_xy( X, Y );       ///显示字符串
    while (*s) 
      {
        LCD_write_char( 0, *s );
		s ++;
      }
  }
void LCD_write_dan_data(unsigned char X,unsigned char Y,unsigned char z)
{
 unsigned char i;            //显示一个字节数字
 LCD_set_xy( X, Y );
 i=z+'0';
 LCD_write_char(0,i);
 }
void LCD_write_chang_data(unsigned char X,unsigned char Y, unsigned long z)
{
 unsigned char i;            //显示一个长字节数字(0~4294967295)
 LCD_set_xy( X, Y );     //注:现在显的数是个位开始的
 while(z)
 {
  i=z%10+'0';
  z=z/10;
 LCD_write_char(0,i);
 }
}
/*************************************************************
  使用方法:
   先LCD_init();
   再用上面要显的数
*************************************************************/
void main()
{
 LCD_init();
 LCD_write_chang_data(0,0,1234567890);
}