LCD-driver.rar_16f887

#include <stdlib.h> #include <ctype.h> #include "lcd.h" void lcd_init(){ unsigned char i; LCD_EN_TRIS = 0; LCD_RS_TRIS = 0; LCD_RW_TRIS = 0; LCD_DATA4_TRIS = 0; LCD_DATA5_TRIS = 0; LCD_DATA6_TRIS = 0; LCD_DATA7_TRIS = 0; LCD_EN = 0; LCD_RS = 0; LCD_RW = 0; __delay_ms(100); // delay for power on // reset LCD lcd_put_byte(0,0x30); __delay_ms(50); lcd_put_byte(0,0x30); __delay_ms(50); lcd_put_byte(0,0x32); __delay_ms(100); // delay for LCD reset __delay_ms(100); // delay for LCD reset __delay_ms(100); // delay for LCD reset while(lcd_busy()); lcd_put_byte(0,FOUR_BIT & LINES_5X7); // Set LCD type while(lcd_busy()); lcd_put_byte(0,DOFF&CURSOR_OFF&BLINK_OFF); // display off while(lcd_busy()); lcd_put_byte(0,DON&CURSOR_OFF&BLINK_OFF); // display on while(lcd_busy()); lcd_put_byte(0,0x01); // clear display and move cursor to home while(lcd_busy()); lcd_put_byte(0,SHIFT_CUR_LEFT); // cursor shift mode while(lcd_busy()); lcd_put_byte(0,0x01); // clear display and move cursor to home while(lcd_busy()); } unsigned char lcd_busy() { unsigned char busy; LCD_DATA4_TRIS = 1; LCD_DATA5_TRIS = 1; LCD_DATA6_TRIS = 1; LCD_DATA7_TRIS = 1; LCD_RW = 1; LCD_RS = 0; __delay_us(20); LCD_EN = 1; __delay_us(20); busy = LCD_DATA7; LCD_EN = 0; __delay_us(20); LCD_EN = 1; __delay_us(20); LCD_EN = 0; return busy; } void lcd_clear() { lcd_put_byte(0,CLEAR); // CLEAR command while(lcd_busy()); } unsigned char lcd_get_byte(unsigned char rs) { BYTE_VAL b; LCD_DATA4_TRIS = 1; LCD_DATA5_TRIS = 1; LCD_DATA6_TRIS = 1; LCD_DATA7_TRIS = 1; LCD_RW = 1; LCD_RS = 0; if(rs) LCD_RS = 1; __delay_us(20); LCD_EN = 1; __delay_us(20); b.bits.b7 = LCD_DATA7; b.bits.b6 = LCD_DATA6; b.bits.b5 = LCD_DATA5; b.bits.b4 = LCD_DATA4; LCD_EN = 0; __delay_us(20); LCD_EN = 1; __delay_us(20); b.bits.b3 = LCD_DATA7; b.bits.b2 = LCD_DATA6; b.bits.b1 = LCD_DATA5; b.bits.b0 = LCD_DATA4; LCD_EN = 0; return b.Val; } void lcd_put_byte(unsigned char rs, unsigned char b) { BYTE_VAL temp; LCD_DATA4_TRIS = 0; LCD_DATA5_TRIS = 0; LCD_DATA6_TRIS = 0; LCD_DATA7_TRIS = 0; LCD_RS = 0; if(rs) LCD_RS = 1; __delay_us(20); LCD_RW = 0; __delay_us(20); LCD_EN = 0; temp.Val = b; // send the high nibble LCD_DATA4 = temp.bits.b4; LCD_DATA5 = temp.bits.b5; LCD_DATA6 = temp.bits.b6; LCD_DATA7 = temp.bits.b7; __delay_us(20); LCD_EN = 1; __delay_us(20); LCD_EN = 0; // send the low nibble LCD_DATA4 = temp.bits.b0; LCD_DATA5 = temp.bits.b1; LCD_DATA6 = temp.bits.b2; LCD_DATA7 = temp.bits.b3; __delay_us(20); LCD_EN = 1; __delay_us(20); LCD_EN = 0; } void lcd_putc(char c){ switch(c){ case '\f': lcd_put_byte(0, 1); while(lcd_busy()); break; case '\n': lcd_gotoxy(0, 1); break; default: if(isprint(c)){ lcd_put_byte(1, c); while(lcd_busy()); } break; } } void lcd_gotoxy(unsigned char col, unsigned char row) { unsigned char address; if(row!=0) address=0x40; else address=0; address += col; lcd_put_byte(0,0x80|address); while(lcd_busy()); } void lcd_puts(const char* s) { while(*s){ lcd_putc(*s++); } }