/*********************************************************** * Program: simple_driver.c * Version 1.2 * Created: 2006. aug 28. * Author: gtk * uprog@tvn.hu * Comments: HD44780 based LCD driver * ************************************************************/ #include "simple_driver.h" #include #include #include //delay us max: 65535us void lcd_delay_us (uint16_t us) { uint16_t i = 0; for (; i < us; i++) _delay_us (1.0); } //delay_ms max: 65535ms lcd_delay_ms (double ms) { //delay time in us = ms*10*100 uint16_t t = (10 * ms); while (t--) lcd_delay_us (100); } void lcd_toggle_E () { //--enable puls width(high level) min 230 ns-- LCD_PORT |= (1 << LCD_E); // E=1 lcd_delay_us (25); //KS0065: ~25us, DEM16102SYH-PY: ~50us, HD44780: ~550 us LCD_PORT &= ~(1 << LCD_E); // E=0 } /*-----------------'06. aug. 29. 10:09--------------- * Clear display *--------------------------------------------------*/ void lcd_cls () { LCD_PORT = 0x0; lcd_toggle_E (); LCD_PORT = (1 << LCD_DB4); lcd_toggle_E (); lcd_delay_ms (1.6); //1.6ms } /*-----------------'06. aug. 29. 10:09--------------- * Home position *--------------------------------------------------*/ void lcd_home () { LCD_PORT = 0x0; lcd_toggle_E (); LCD_PORT = (1 << LCD_DB5); lcd_toggle_E (); lcd_delay_ms (1.6); //1.6ms } /*-----------------'06. aug. 29. 10:09--------------- * LCD & Cursor control (Blinking, ON/OFF,...) *--------------------------------------------------*/ void lcd_control (uint8_t disonoff, uint8_t curonoff, uint8_t curblink) { uint8_t temp = 0x0; LCD_PORT = 0x0; lcd_toggle_E (); temp = (1 << LCD_DB7); // if (disonoff == 1) temp |= (1 << LCD_DB6); //display on if (curonoff == 1) temp |= (1 << LCD_DB5); //cursor on if (curblink == 1) temp |= (1 << LCD_DB4); //cursor blink LCD_PORT = temp; lcd_toggle_E (); lcd_delay_us (39); } /* void lcd_set_DDRAM_addr (uint8_t addr) { uint8_t tmp; tmp = (1 << LCD_DB7); //0x08; tmp |= addr >> 4; //addr high nibble LCD_PORT = tmp; lcd_toggle_E (); LCD_PORT = (addr & 0x0F); //addr low nibble lcd_toggle_E (); lcd_delay_us (39); } */ /*-----------------'06. aug. 29. 10:09 -------------------- * Goto position (0x00 - 1.row, 1.col) * (0x40 - 1.row, 2.col) *--------------------------------------------------*/ void lcd_set_DDRAM_addr (uint8_t addr) { uint8_t tmp; tmp = (1 << LCD_DB7); //0x08; if(addr&0x40) tmp|=(1<> 4); //out cmd and addr high nibble LCD_PORT = cmd; lcd_toggle_E (); // LCD_PORT = (addr & 0x0F); //low nibble lcd_toggle_E (); // lcd_delay_us (39); // } /* * lcd_put_custom_char (uint8_t charnum, uint8_t values[]) * sajat karakter megjelenitese. * charnum: a karakter n. helye a CGRAMban. Osszesen 8(8 bytos) karaktert lehet definialni. * values[]: 8 byteos adattombre mutato,amelyben definialva vannak a sajat karakter * bytejai.(karakterleiro.) */ uint8_t lcd_put_custom_char (uint8_t charnum, const uint8_t * values) { register uint8_t j = 0; //addr = 0x40 + (charnum * 8); uint8_t *p = values; if (charnum > 7) { return 1; } lcd_set_CGRAM_addr (charnum * 8); //charnum: (8byteos)karakter n. helye a CGRAMban for (; j < 8; j++) { lcd_putch (*(p + j)); //write 8 byte data (one character) to CGRAM } return (0); } //clear CGRAM void lcd_clear_CRGAM () { register uint8_t i = 0; for (; i < 64; i++) { lcd_set_CGRAM_addr (i); lcd_putch (0x00); } } /* *lcd_vertical_scroll * __custom_chars: custom chars array * __NUM: number of chars (MAX 8) * __x_delay_ms: delay * __clear: 1: set CGRAM clear mode; 0: no CGRAM clear */ void lcd_vertical_scroll (const void *__custom_chars, uint8_t __NUM, uint16_t __verti_delay_ms, uint16_t __horiz_delay_ms, uint8_t ddram_addr, uint8_t __clear) { typedef uint8_t matrix[8][8]; matrix *p_mtx = __custom_chars; register uint8_t i, j; uint8_t n, m; uint8_t cgram_addr = 0x00; uint8_t d, block_line = 7; __clear ? lcd_clear_CRGAM () : 0; for (n = 0; n < 8; n++) //ciklus: karakter blokk/sorok szamaig. { for (i = 0; i < __NUM; i++) { //CGRAM cimbeallitas lcd_set_CGRAM_addr (cgram_addr + block_line); for (j = 0; j < n; j++) { lcd_putch (pgm_read_byte_near (&(*p_mtx)[i][j])); //irunk cgramba n byteot } cgram_addr = (i + 1) * 8; //kov. 8byte cime a GCRAMban //kiirtunk __NUM -nyi sajat tipusu karaktert a CGRAMba //(elso ciklusban uresen marad a GGRAM) } //megjelenitjuk a CGRAM tartalmat (a karaktereket): //(igy kulon ciklusban mar a CGRAMba irt __NUM karakternyi tartalmat jelenit meg, gyorsabb/szebb) for (m = 0; m < __NUM; m++) { lcd_set_DDRAM_addr (ddram_addr + m); lcd_putch (m); lcd_delay_ms (__horiz_delay_ms); } cgram_addr = 0x00; block_line--; //varunk: lcd_delay_ms (__verti_delay_ms); } } /* lcd_putch (pgm_read_byte_near(&(*p_mtx)[i][j])); ----->> lcd_putch ((__extension__( { uint16_t __addr16 = (uint16_t) ((uint16_t)(&(*p_mtx)[i][j])); uint8_t __result; __asm__ ( "lpm %0, Z" "\n\t" : "=r" (__result) : "z" (__addr16) ); __result; } ))); */ /*-----------------'06. aug. 29. 10:09--------------- * Put character on LCD *--------------------------------------------------*/ void lcd_putch (uint8_t data) { uint8_t temp; temp = (data >> 4); //temp -be felso 4bit //temp |= (1 << LCD_RS); //adatkuldes bekapcs //LCD_PORT = temp; LCD_PORT = 0x00; //! LCD_PORT |= (1 << LCD_RS) | (0b00000001 & (temp >> 3) ); //kiirjuk LCD_PORT |= (1 << LCD_RS) | (0b00000010 & (temp >> 1) ); LCD_PORT |= (1 << LCD_RS) | (0b00000100 & (temp << 1) ); LCD_PORT |= (1 << LCD_RS) | (0b00001000 & (temp << 3) ); lcd_toggle_E (); //LCD vegrehajtja temp = (data & 0x0F); //temp -be also 4BIT; felso 4bit nullazva //temp |= (1 << LCD_RS); //adatkuldes bekapcs LCD_PORT = 0x00; //! //LCD_PORT = temp; LCD_PORT |= (1 << LCD_RS) | (0b00000001 & (temp >> 3) ); //kiirjuk LCD_PORT |= (1 << LCD_RS) | (0b00000010 & (temp >> 1) ); LCD_PORT |= (1 << LCD_RS) | (0b00000100 & (temp << 1) ); LCD_PORT |= (1 << LCD_RS) | (0b00001000 & (temp << 3) ); lcd_toggle_E (); // lcd_delay_us (43); //wait 43us } /*-----------------2006. aug. 28. 23:21--------------- * Display null terminated string *--------------------------------------------------*/ void lcd_putstr (const unsigned char * data, uint8_t addr) { register uint8_t *p = data; #if LCD_LINE_1X16 uint8_t i = 0; #endif lcd_set_DDRAM_addr (addr); while (*p) { //ha 1X16(2X8) karakteres LCD akkor 8 karakter kiirasa utan //atvaltunk a masodik sorba,azaz a 9. karaktert mar a masodik sorba irjuk. #if LCD_LINE_1X16 if (i == (8 - addr)) { lcd_set_DDRAM_addr (LCD_SECND_LN_ADDR); //2. sor 8BITes cime } #endif lcd_putch (*p); //adatkuldes p++; #if LCD_LINE_1X16 i++; // #endif } } /*---------2009_03_xx-------------------------------- * Display initialization *--------------------------------------------------*/ void lcd_init (void) { //The display will be busy for approximately 30mS after power ON. DDR = 0x7F; //DDR as out, PD7 - FO bemenet LCD_PORT = 0x80; //PORT = 0, PD7 felhuzva lcd_delay_ms (40.0); //wait 40ms after power ON //------------------------------------------------------------- //8 bites módba kapcsolás (3x)˘˘------------------------------- LCD_PORT = (1 << LCD_DB5) | (1 << LCD_DB4); lcd_toggle_E (); lcd_delay_ms (4.1); lcd_toggle_E (); lcd_delay_us (100); lcd_toggle_E (); LCD_PORT = (1 << LCD_DB5); //set 4-bit operation lcd_toggle_E (); lcd_delay_ms (5.0); //wait more then 4.1ms lcd_toggle_E (); LCD_PORT = (1 << LCD_DB7); lcd_toggle_E (); //2 line mod, 5x8 fonts lcd_delay_us (39); //39us LCD_PORT = 0x0; lcd_toggle_E (); LCD_PORT = (1 << LCD_DB7); lcd_toggle_E (); //Display ctrl: display off, cursor off, blink off lcd_delay_us (39); LCD_PORT = 0x0; lcd_toggle_E (); LCD_PORT = (1 << LCD_DB4); lcd_toggle_E (); //clr lcd_delay_ms (1.6); //1.6ms LCD_PORT = 0x0; lcd_toggle_E (); LCD_PORT = (1 << LCD_DB6) | (1 << LCD_DB5); lcd_toggle_E (); //increment mode,entire shift off }