LCD1602 display numbers, characters, custom characters, strings, cursors

LCD1602 display numbers, characters, custom characters, strings, cursors

/******************************************* program name:   1602 LCD Clock program writing time: October 4, 2015 hardware support: LCD1602 LCD screen   &NBSP;STC12C4052AD external 12MHZ crystal oscillator   Wiring definition:  db0_db7 --> p1^0 --p1^7rs    = p3 ^ 2;        rw   = p3  ^ 3; E    = P3 ^ 4;  function: Test LCD1602 display, display time,/HTTP// 990487026.blog.51cto.com/ ,welcome to linux debian vs redhat ************** /#include  <AT89X52.h>      //  include header files  //typedef unsigned char      uint8;   //  Unsigned 8-bit integer variable  //#define   LCD1602_DB0_DB7  P1   //  define LCD1602 data bus sbit  LCD1602_RS   = P3 ^ 2;     //  Defines the RS control line for the LCD1602 SBIT&NBSP;LCD1602_RW&NBsp;  = p3 ^ 3;     //  defines the RW control line for LCD1602 sbit lcd1602_ e    = p3 ^ 4;     //  defines the E control line for LCD1602 Sbit  LCD1602_Busy = P1 ^ 7;     //  define LCD1602 lines (with lcd1602_ DB0_DB7 Association)//  Definition LCM2402 instruction set  //  (see Technical Manual for details) #define           CMD_clear         0x01              //  Clear Screen #define          CMD_back          0x02              // ddram back to 0-bit #define          CMD_dec1          0x04              //  read-in AC (pointer) minus 1, write left #define          CMD_add1          0x06              //  read-in AC (pointer) plus 1, write right #define          CMD_dis_gb1     0x0f              //  Open Cursor _ open cursor blinking #define          CMD_dis_gb2     0x0e              //  on display _ Open cursor _ off cursor blink #define          CMD_dis_gb3     0x0c              //  on show _ Off cursor blink #define          cmd_off_dis     0x08             //  off Display _ off cursor _ Off cursor Blinking #define         cmd_set82        0x38             // 8 Bit Bus _ 2 Line Display #define         cmd_set81        0x30             // 8 bit bus _1 line display (top row) #define          CMD_set42        0x28             // 4 bit bus _2 line display # define         cmd_set41        0x20             // 4 bit bus _1 line display (top row) #define          lin_1           0x80              // 4-bit bus _1 line display (top row) #define           lin_2            0xc0             // 4 Bit Bus _ 1 line display (top row) void delay_ms  (unsigned int a)  {    unsigned int  i;    while  ( --a != 0 )    {  for   (i=0;i<=600;i++)     }}// lcd1602, if LCD1602 is busy, this function will wait until the non-busy state  //void  lcd1602_testbusy (void) {    lcd1602_db0_db7 = 0xff;  //device read state     LCD1602_RS = 0;    LCD1602_RW = 1;     LCD1602_E = 1;    while (lcd1602_busy);   //wait for LCM not busy     lcd1602_e =  0;    }//  Write instruction Program  //void lcd1602_writecmd (Uint8 lcd1602_command)  {    lcd1602_testbusy ();    lcd1602_db0_db7 = lcd1602_ command;   lcd1602_rs = 0;   lcd1602_rw = 0;    lcd1602_e = 1;   delay_ms (5);  //  Modify the delay, change the display speed     lcd1602_e = 0;}   Write Data program  //void lcd1602_writedata (uint8 lcd1602_data) {    lcd1602_ Testbusy ();    lcd1602_db0_db7 = lcd1602_data;   lcd1602_rs =  1;   LCD1602_RW = 0;   LCD1602_E = 1;    delay_ms (5);  //  Modify the delay, change the display speed    lcd1602_e = 0;}  //  Print String Program     (This function calls pointer function) length 48 characters within  void print (UINT8&NBSP;A,UINT8&NBSP;*STR) {  lcd1602_writecmd (a  | 0x80)   while (*str !=  ') {  lcd1602_writedata (*str++);  }  *str = 0;}   Print single character program  // void print2 (uint8 a,uint8 t) {  lcd1602_writecmd (a | &NBSP;0X80);   lcd1602_writedata (t);}   Custom characters   write a total of 16 literal characters, which can be extracted directly from the Cgram code after writing. Uint8 code xword[]={    0x18,0x18,0x07,0x08,0x08,0x08,0x07,0x00,  //℃, Code  0x00    0x00,0x00,0x00,0x00,0xff,0x00,0x00,0x00,  //One, code  0x01     0x00,0x00,0x00,0x0e,0x00,0xff,0x00,0x00,  //Two, Code  0x02     0x00,0x00,0xff,0x00,0x0e,0x00,0xff,0x00,  //Three, code &NBSP;0X03&NBSP;&NBSP;&NBSP;&NBSP;0X00,0X00,0XFF, 0xf5,0xfb,0xf1,0xff,0x00,  //Four, code  0x04    0x00,0xfe,0x08,0xfe,0x0a,0x0a, 0xff,0x00,  //Five, code  0x05    0x00,0x04,0x00,0xff,0x00,0x0a,0x11,0x00,  //six, Code  0x06    0x00,0x1f,0x11,0x1f,0x11,0x11,0x1f,0x00,  //Day, code  0x07};void  cgramwrite (void)  { //  loading cgram //    uint8 i;     lcd1602_writecmd (0x06);    // cgram address Auto plus 1    lcd1602_ Writecmd (0x40)    // cgram address is set at 00     for (i=0;i<64;i++)  {     lcd1602_writedata (Xword[i]);//  writes data by array     }}// lcd1602 initialization  //(user definable, add  *  program line must be retained but modifiable) void lcd1602_init (void) {   lcd1602_writecmd ( CMD_SET82); //*  display mode settings: Display 2 lines, each character is 5*7 pixels, cmd_set81 is a row    lcd1602_writecmd (cmd_clear);  //   Display Clear Screen    lcd1602_writecmd (cmd_back);  //*  data pointer to 1th line 1th character position    lcd1602_writeCMD (CMD_ADD1);  //   display cursor movement settings: text does not move, the cursor moves right    lcd1602_writecmd (CMD_DIS_GB1);   //   display on and cursor settings: Display on, cursor open, flashing open    cgramwrite ();      //    Write custom character}void main  (void) {  lcd1602_init () to Cgram,//lcd1602 initialize       while (1) {   print2 (0x80,1+0x30);   //  show number 1   on 1th row 1th digit Print2 (0x40,5+0x30);   //  shows the number 2  print2 (0x85,0x05);    on line 1th 1th digit   //  Display the custom character   print2 (0x88,0xe4);     //  on line 5th of line 1th 9th bit  ASCII  in the upeer 4bit 1110  lower 4bit 0100 corresponding  μ    Delay_ms (;  // ) Open cursor display, flashing, after μ will show a beating cursor   print2 (0x81, ' D ');      //  shows the custom character   print  (0x42, "www.51cto.com") on line 5th of row 1th, and  //prints from left to right at the first place on line 2nd. Blog.51cto.com "String &NBSP;&NBSP;PRint  (0x8e, "hi");  //prints the "HI" string from left to right in the 15th place on line 1th   } } //LCD1602  displays numbers, characters, custom characters, strings, Cursor

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LCD1602 display numbers, characters, custom characters, strings, cursors