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driver.c
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/*Ôóíêöèÿ ñ÷èòûâàíèÿ ñòàòóñà ËÑÄ. Ðàáîòàåò ñ ðàíå âûáðîííûì êðèñòàëîì*/
byte ReadCode( void ){
byte ret;
//Êîíôèãóðèðóåì ïîðòû íà ââîä
LCD_DATA_PORT=0x00;
LCD_DATA_DDR=0x00;
//Óêàçûâàåì ËÑÄ òî ÷òî áóäåò ÷èòàòüñÿ êîìàíäà
ClrBit(LCD_CONTROL_PORT, A0);
SetBit(LCD_CONTROL_PORT, RDWR);
//Íóæíî ïîäîæäàòü ïðåæäå ÷åì âûñòîâëÿòü ñòîá Å
delay_us(10);
SetBit(LCD_CONTROL_PORT, E);
// Äàííûå íà øèíå ïîÿâþòüñÿ íå ñðàçó
delay_us(10);
ret=LCD_DATA_PIN;
//Ñáðàñûâàåì ñòðîá Å è âîçâðîùàåì ðåçóëüòàò
ClrBit(LCD_CONTROL_PORT,E);
return ret;
}
/*Ôóíêöèÿ îæèäàíèÿ ñáðîñà ôëàãà çàíÿòîñòè*/
void WaitBusy(void){
byte stat;
//×èòàåì ñòàòóñ ïîêà íå ñáðîñèòüñÿ áèò BUSY
stat=ReadCode();
while(stat==(1<<BUSY)) stat=ReadCode();
}
//Òîæå ñàìîå òîëüêî äëÿ RESET
void WaitReset(void){
byte stat;
stat=ReadCode();
while(stat==(1<<RESET)) stat=ReadCode();
}
//Òîæå ñàìîå òîëüêî äëÿ ON/OFF
void WaitON(void){
byte stat;
stat=ReadCode();
while(stat==(1<<ONOFF)) stat=ReadCode();
}
/*Ôóíêöèÿ ñ÷èòûâàíèÿ áàéòà èç ïàìÿòè ËÑÄ*/
byte ReadData( void ){
byte ret;
//Æäåì ïîêà êðèñòàëë îñâîáîäèòüñÿ
WaitBusy();
//Êîíôèãóðèðóåì ïîðò
LCD_DATA_PORT=0x00;
LCD_DATA_DDR=0x00;
//Áóäèì ÷èòàòü äàííûå
SetBit(LCD_CONTROL_PORT, A0);
SetBit(LCD_CONTROL_PORT, RDWR);
//Íóæíî ïîäîæäàòü ïðåæäå ÷åì âûñòîâëÿòü ñòîá Å
delay_us(10);
SetBit(LCD_CONTROL_PORT, E);
//Äàííûå íà øèíå ïîÿâþòüñÿ íå ñðàçó
delay_us(10);
ret=LCD_DATA_PIN;
//Ñáðàñûâàåì ñòðîá Å
ClrBit(LCD_CONTROL_PORT,E);
//Âîçâðîùàåì ðåçóëüòàò
return ret;
}
/*Ôóíêöèÿ âûâîäèò äàííûå íà ËÑÄ
Âñå ïî÷òè òàêæå êàê è ñî ÷òåíèåì*/
void WriteData(byte data){
WaitBusy();
LCD_DATA_DDR=0xFF;
SetBit(LCD_CONTROL_PORT, A0);
ClrBit(LCD_CONTROL_PORT, RDWR);
delay_us(10);
SetBit(LCD_CONTROL_PORT, E);
LCD_DATA_PORT=data;
delay_us(10);
ClrBit(LCD_CONTROL_PORT, E);
}
/*Ôóíêöèÿ âûâîäà êîìàíäû íà äèñïëåé*/
void WriteCode(byte code){
WaitBusy();
LCD_DATA_DDR=0xFF;
ClrBit(LCD_CONTROL_PORT, A0);
ClrBit(LCD_CONTROL_PORT, RDWR);
delay_us(10);
SetBit(LCD_CONTROL_PORT, E);
LCD_DATA_PORT=code;
delay_us(10);
ClrBit(LCD_CONTROL_PORT, E);
}
/*Ôóíêöèÿ Èíèöèàëèçàöèè äèñïëåÿ*/
void LCD_INIT( void ){
byte stat;
//Ïðîãðàìíî âûðóáàåì Jtag
MCUCSR = 0x80;
MCUCSR = 0x80;
//Êîíôèãóðèðóåì ïîðò
LCD_DATA_DDR=0xFF;
LCD_CONTROL_DDR=0xFF;
//Âñå ëèíèè óïðàâëÿåùåãî ïîðòà â 0.  òîì ÷èñëå è RES
LCD_CONTROL_PORT=0x00;
//Óäåðæèâàåì ñèãíàë ñáðîñà íà ëèíèè
delay_ms(100);
//Ñáðàñûâàåì ñèãíàë Ñáðîñà.(Ñèãíàë RES èíâåðòèðóþùèé)
SetBit(LCD_CONTROL_PORT, RES);
//Âûáèðàåì 1 êðèñòàë
SetBit(LCD_CONTROL_PORT, E1);
//Âêëþ÷àåì äèñïëåé è óñòàíàâëèâàåì ñòàðòîâóþ ëèíèþ
LCD_ON;
LCD_START_LINE(0);
ClrBit(LCD_CONTROL_PORT, E1);
//Òîæå ñàìîå äëÿ 2-ãî êðèñòàëà
SetBit(LCD_CONTROL_PORT, E2);
WaitBusy();
LCD_ON;
LCD_START_LINE(0);
}
//Ôóíêöèÿ îò÷èñòêè ýêðàíà
void LCD_CLS(void){
byte i;
byte j;
byte stat;
ClrBit(LCD_CONTROL_PORT, E2);
delay_us(10);
SetBit(LCD_CONTROL_PORT, E1);
LCD_OFF;
LCD_SET_ADDRESS(0);
for(i=0;i<8; i++){
LCD_SET_PAGE(i);
for(j=0; j<64; j++){
WriteData(0x00);
}
}
LCD_ON;
ClrBit(LCD_CONTROL_PORT, E1);
delay_us(10);
SetBit(LCD_CONTROL_PORT, E2);
LCD_OFF;
LCD_SET_ADDRESS(0);
for(i=0;i<8; i++){
LCD_SET_PAGE(i);
for(j=0; j<64; j++){
WriteData(0x00);
}
}
LCD_ON;
}