[syntax=c]//-----------------------------------------------------
//File: lcd_8bit.c
//Based on: ELECTRONIC ASSEMBLY JM
//-----------------------------------------------------
//---Includes---
#include "define.h"
#include "lcd8bit.h"
#include <avr/io.h>
#include <util/delay.h>
//-----------------------------------------------------
//Func: initDispl()
//Desc: inits Display
//-----------------------------------------------------
void initDispl(void)
{
//Port init PORT DIRECTION)
DDRA |= D0|D1|D2|RW|EN|RS|RESET; // all outputs
DDRB |= D3|D4|D5|D6|D7; // all outputs
PORTA &= ~(D0|D1|D2|RW|EN|RS);// all low
PORTB &= ~(D3|D4|D5|D6|D7);// all low
PORTA |= RESET;// RESET high
_delay_ms(10);
//Reset of LCD module
PORTA &= ~RESET;
_delay_ms(15);
PORTA |= RESET;
_delay_ms(5);
//init Display
WriteIns(0x3A);//8-Bit data length extension Bit RE=1; REV=0
WriteIns(0x09);//4 line display
WriteIns(0x06);//Bottom view
WriteIns(0x1E);//Bias setting BS1=1
WriteIns(0x39);//8-Bit data length extension Bit RE=0; IS=1
WriteIns(0x1B);//BS0=1 -> Bias=1/6
WriteIns(0x6E); //Devider on and set value
WriteIns(0x57); //Booster on and set contrast (BB1=C5, DB0=C4)
WriteIns(0x72); //Set contrast (DB3-DB0=C3-C0)
WriteIns(0x38); //8-Bit data length extension Bit RE=0; IS=0
ClrDisplay();
DisplayOnOff(DISPLAY_ON | CURSOR_ON | BLINK_ON);
}
//---------------------------------------------------------------
// Data direction OUT
//---------------------------------------------------------------
static inline void DataDirOut(void)
{
DDRA |= D0|D1|D2; // all outputs
DDRB |= D3|D4|D5|D6|D7; // all outputs
}
//---------------------------------------------------------------
// Data direction IN
//---------------------------------------------------------------
static inline void DataDirIn(void)
{
DDRA &= ~(D0|D1|D2); // all inputs
DDRB &= ~(D3|D4|D5|D6|D7); // all inputs
}
//-----------------------------------------------------
//Func: WriteChar(character)
//Desc: sends a single character to display
//-----------------------------------------------------
void WriteChar (char character)
{
WriteData(character);
}
//-----------------------------------------------------
//Func: WriteString(string)
//Desc: sends a string to display,
//-----------------------------------------------------
void WriteString(char *string)
{
while(*string)
WriteData(*string++);
//register char znak;
//while ( (znak=*(string++)) )
//WriteData( ( znak>=0x80 && znak<=0x87 ) ? (znak & 0x07) : znak);
}
//-----------------------------------------------------
//Func: SetPostion(postion)
//Desc: set postion
//-----------------------------------------------------
void SetPostion(char pos)
{
WriteIns(LCD_HOME_L1+pos);
}
//-----------------------------------------------------
//Func: DisplayOnOff(control)
//Desc: use definitions of header file to set display
//-----------------------------------------------------
void DisplayOnOff(char data)
{
WriteIns(0x08+data);
}
//-----------------------------------------------------
//Func: DefineCharacter(memory postion, character data)
//Desc: stores an own defined character
//-----------------------------------------------------
void DefineCharacter(unsigned char postion, unsigned char *data)
{
unsigned char i=0;
WriteIns(0x40+8*postion);
for (i=0; i<8; i++)
{
WriteData(data[i]);
}
SetPostion(LINE1);
}
//-----------------------------------------------------
//Func: ClrDisplay
//Desc: Clears entire Display content and set home pos
//-----------------------------------------------------
void ClrDisplay(void)
{
WriteIns(0x01);
SetPostion(LINE1);
}
//-----------------------------------------------------
//Func: SetContrast
//Desc: Sets contrast 0..63
//-----------------------------------------------------
void SetContrast(unsigned char contr)
{
WriteIns(0x39);
WriteIns(0x54 | (contr >> 4));
WriteIns(0x70 | (contr & 0x0F));
WriteIns(0x38);
_delay_ms(25);
}
//-----------------------------------------------------
//Func: SetView
//Desc: view bottom view(0x06), top view (0x05)
//-----------------------------------------------------
void SetView(unsigned char view)
{
WriteIns(0x3A);
WriteIns(view);
WriteIns(0x38);
}
//-----------------------------------------------------
//Func: SetROM
//Desc: Changes the Rom code (ROMA=0x00, ROMB=0x04, ROMC=0x0C)
//---------------------------------------------------
void SetROM (unsigned char rom)
{
WriteIns(0x3A);
WriteIns(0x72);
WriteData(rom);
WriteIns(0x38);
}
//------------------------------------------------------
// Wysłanie bajtu do LCD (D0..D7)
//------------------------------------------------------
static inline void SendData(uint16_t data)
{
if (data&(1<<0)) PORTA |= D0; else PORTA &= ~D0;
if (data&(1<<1)) PORTA |= D1; else PORTA &= ~D1;
if (data&(1<<2)) PORTA |= D2; else PORTA &= ~D2;
if (data&(1<<3)) PORTB |= D3; else PORTB &= ~D3;
if (data&(1<<4)) PORTB |= D4; else PORTB &= ~D4;
if (data&(1<<5)) PORTB |= D5; else PORTB &= ~D5;
if (data&(1<<6)) PORTB |= D6; else PORTB &= ~D6;
if (data&(1<<7)) PORTB |= D7; else PORTB &= ~D7;
}
//----------------------------------------------------
// Odczyt bajtu z LCD (D0..D7)
//----------------------------------------------------
static inline uint16_t CheckData(void)
{
uint16_t result=0;
DataDirIn();
if(PINA&D0) result |= (1<<0);
if(PINA&D1) result |= (1<<1);
if(PINA&D2) result |= (1<<2);
if(PINB&D3) result |= (1<<3);
if(PINB&D4) result |= (1<<4);
if(PINB&D5) result |= (1<<5);
if(PINB&D6) result |= (1<<6);
if(PINB&D7) result |= (1<<7);
DataDirOut();
return result;
}
//#endif
//-----------------------------------------------------
//Func: WriteIns(instruction)
//Desc: sends instruction to display
//-----------------------------------------------------
void WriteIns(char ins)
{
CLR_RS;
CLR_RW;
SendData(ins);
SET_EN;
_delay_us(100);
CLR_EN;
while( (CheckBF() & 0x80) );
}
//-----------------------------------------------------
//Func: WriteData(data)
//Desc: sends data to display
//-----------------------------------------------------
void WriteData(char _data)
{
SET_RS;
CLR_RW;
SendData(_data);
SET_EN;
_delay_us(100);
CLR_EN;
while( (CheckBF() & 0x80) );
}
//-----------------------------------------------------
//Func: CheckBF()
//Desc: reads data
//-----------------------------------------------------
unsigned char CheckBF(void)
{
CLR_RS;
SET_RW;
SET_EN;
return CheckData();
CLR_EN;
}[/syntax]Statystyki: Napisane przez piotr_for — 31 paź 2017, o 20:47
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