| 0,0 → 1,147 |
|---|
| /* mija 2008 |
| |
| source file for lcd HITACHI 16x2,8x2,... |
| |
| !!! must be set PINs,PORTs,DDR in lcd.h |
| |
| |
| ver.: 0.0 TESTED |
| |
| */ |
| |
| |
| #include <avr/io.h> |
| #include <util/delay.h> |
| #include <avr/pgmspace.h> |
| #include "lcd.h" |
| |
| //#include <stdio.h> |
| |
| //************************************************************* |
| |
| #define H_D0 PORT_D0 |=_BV(PIN_D0) |
| #define L_D0 PORT_D0 &= ~(_BV(PIN_D0)) |
| |
| #define H_D1 PORT_D1 |=_BV(PIN_D1) |
| #define L_D1 PORT_D1 &= ~(_BV(PIN_D1)) |
| |
| #define H_D2 PORT_D2 |=_BV(PIN_D2) |
| #define L_D2 PORT_D2 &= ~(_BV(PIN_D2)) |
| |
| #define H_D3 PORT_D3 |=_BV(PIN_D3) |
| #define L_D3 PORT_D3 &= ~(_BV(PIN_D3)) |
| |
| #define H_E PORT_E |=_BV(PIN_E) |
| #define L_E PORT_E &= ~(_BV(PIN_E)) |
| |
| #define H_RS PORT_RS |=_BV(PIN_RS) |
| #define L_RS PORT_RS &= ~(_BV(PIN_RS)) |
| |
| //************************************************************* |
| |
| // Definice konstant pro LCD display |
| // |
| #define LCD_CURSOR_ON_ 0x0E // kurzor jako blikajici radka pod znakem |
| #define LCD_CURSOR_OFF_ 0x0C // zadny kurzor |
| #define LCD_LINE_2 0x40 // adresa 1. znaku 2. radky |
| |
| |
| // Definice rezimu LCD displeje |
| // |
| |
| uint8_t PROGMEM LCD_INIT_STRING[4] = |
| { |
| 0x28, // intrfejs 4 bity, 2 radky, font 5x7 |
| LCD_CURSOR_OFF_, // display on, kurzor off, |
| 0x01, // clear displeje |
| 0x06 // inkrement pozice kurzoru (posun kurzoru doprava) |
| }; |
| |
| void LCD_init_IO_PIN(void) |
| { |
| DDR_D0 |= _BV(PIN_D0); |
| DDR_D1 |= _BV(PIN_D1); |
| DDR_D2 |= _BV(PIN_D2); |
| DDR_D3 |= _BV(PIN_D3); |
| DDR_E |= _BV(PIN_E); |
| DDR_RS |= _BV(PIN_RS); |
| } |
| |
| void LCD_init(void) |
| { |
| uint8_t a; |
| |
| LCD_init_IO_PIN(); |
| _delay_ms(20); |
| L_E; |
| L_RS; |
| for (a=0;a<3;a++) |
| { |
| _delay_ms(2); |
| LCD_send_nibble(0x3); |
| |
| } |
| _delay_us(40); |
| LCD_send_nibble(0x2); |
| _delay_us(40); |
| for (a=0;a<3;a++) |
| { |
| LCD_send_command(pgm_read_byte(&(LCD_INIT_STRING[a]))); |
| _delay_ms(2); |
| } |
| } |
| |
| void LCD_putc(uint8_t data) |
| { |
| LCD_send_data(data); |
| } |
| |
| void LCD_send_command(uint8_t data) |
| { |
| L_RS; |
| LCD_send(data); |
| H_RS; |
| } |
| |
| void LCD_send_data(uint8_t data) |
| { |
| H_RS; |
| LCD_send(data); |
| } |
| |
| void LCD_send(uint8_t data) |
| { |
| LCD_send_nibble(data >> 4); |
| LCD_send_nibble(data); |
| _delay_us(40); |
| } |
| |
| void LCD_send_nibble(uint8_t data) |
| { |
| L_D0;L_D1;L_D2;L_D3; |
| if (data & 0x1) H_D0; |
| if (data & 0x2) H_D1; |
| if (data & 0x4) H_D2; |
| if (data & 0x8) H_D3; |
| H_E; |
| _delay_us(1); |
| L_E; |
| } |
| |
| |
| void LCD_clear(void) |
| { |
| LCD_send_command(1); |
| _delay_ms(2); |
| } |
| |
| void LCD_gotoxy( uint8_t x, uint8_t y) |
| { |
| uint8_t Adr; |
| |
| Adr=x-1; |
| if(y==2) |
| Adr+=LCD_LINE_2; |
| |
| LCD_send_command(0x80|Adr); |
| } |