/****************************************************************************** * Name: LCDD_Initilise ******************************************************************************/ void LCDD_Initialise() { RS = 0; // write control bytes E = 0; DelayMs(15); // power on delay PORTB = 0x30; // attention! ECLOCK(); DelayMs(5); ECLOCK(); DelayUs(100); ECLOCK(); DelayMs(5); PORTB = 0x20; // set 4 bit mode ECLOCK(); DelayUs(40); LCDD_WriteCommand(0x28); // 4 bit mode, 1/16 duty, 5x8 font LCDD_WriteCommand(0x08); // display off LCDD_WriteCommand(0x0F); // display on, blink curson on LCDD_WriteCommand(0x06); // entry mode DelayMs(5); LCDD_WriteCommand(DispCLR); LCDD_WriteCommand(RetHome); LCDD_WriteCommand(DispON); } /****************************************************************************** * Name: LCDD_WriteData ******************************************************************************/ void LCDD_WriteData(byte nibbles) { RS = HI; // indicating data PORTB = (PORTB & 0x0f) | (nibbles & 0x0f0); ECLOCK(); DelayMs(1); PORTB = (PORTB & 0x0f) | (nibbles << 4);// output lower 4 bits ECLOCK(); DelayMs(1); } /****************************************************************************** * Name: LCDD_WriteString ******************************************************************************/ void LCDD_WriteString(const register byte *s) { while(*s) { LCDD_WriteData(*s++); DelayMs(1); } } /****************************************************************************** * Name: ECLOCK ******************************************************************************/ void ECLOCK(void) { DelayUs(1); // tas delay E = HI; // for write cycle only DelayUs(2); E = LOW; DelayUs(1); } /****************************************************************************** * function that clears the screen ******************************************************************************/ void LCDD_Cls() { LCDD_WriteCommand(DispCLR); LCDD_WriteCommand(RetHome); } /****************************************************************************** * Name: LCDD_GotoDispPos ******************************************************************************/ void LCDD_GotoDispPos(unsigned char dd) { LCDD_WriteCommand(dd); }