void hd44780_init()
{
// Setting lcd_port as output
lcd_data_tris = 0x00;
lcd_data = 0x00;
// Delay for more than 15ms
__delay_ms(20);
lcd_data = 0b00000011;
hd44780_pulse();
__delay_ms(5);
lcd_data = 0b00000011;
hd44780_pulse();
__delay_us(120);
lcd_data = 0b00000011;
hd44780_pulse();
//__delay_ms(5);
hd44780_busy();
// Setting function 4bit
lcd_data = 0b00000010;
hd44780_pulse();
//__delay_ms(5);
hd44780_busy();
// Data is now to be sent as 4bit
hd44780_write( 0b00101000 );
//hd44780_write( 0b00001111 );
hd44780_write( 0b00001100 );
hd44780_write( 0b00000001 );
hd44780_write( 0b00000110 );
}
void hd44780_printchr( char dta, unsigned char loc )
{
// Placing cursor
hd44780_write( 0x80 | loc );
hd44780_char( dta );
}
void
hd44780_data(uint8_t byte)
{
// printf("[%02hhx]",byte);
hd44780_write(byte,HD44780_DATA);
_delay_us(74); /* 37us (datasheet) */
}
void hd44780_char( unsigned char bt )
{
// Writing to data register, not instruction register
lcd_rs = 1;
rs_flag = 1;
hd44780_write( bt );
lcd_rs = 0;
rs_flag = 0;
}
void hd44780_block_erase( unsigned char start_loc, unsigned char length )
{
int i;
// Placing cursor
for(i=0;i<length;i++){
hd44780_write( 0x80 | (start_loc+i) );
hd44780_char( ' ' );
}
}
void
hd44780_cmd(uint8_t byte)
{
// printf("<%02hhx>",byte);
hd44780_write(byte,HD44780_CMD);
if(byte == 0x01 || (byte & 0xfe) == 0x02){
_delay_us(3040); /* 1,52 ms (datasheet) */
} else {
_delay_us(74); /* 37 us (datasheet) */
}
}
void hd44780_printstr( char *dta, unsigned char loc )
{
// Placing cursor
//hd44780_write( 0b10000001 );
hd44780_write( 0x80 | loc );
while( *dta != '\0' ){
if( *dta != '\n' ){
hd44780_char( *dta );
}else{
//hd44780_write( 0xC0 );
hd44780_newline();
}
dta++;
}
}
void hd44780_wr_data_noblock(const uint8_t data) {
while (buttons_active) {}
hd44780_RS_On();
hd44780_write(data);
}
void hd44780_wr_cmd(const uint8_t cmd) {
hd44780_RS_Off();
hd44780_write(cmd);
}
void hd44780_wr_data( unsigned char data )
{
hd44780_RS_On();
hd44780_write( data );
}
void hd44780_wr_cmd( unsigned char cmd )
{
hd44780_RS_Off();
hd44780_write( cmd );
}
void hd44780_clear()
{
// Writing to instruction register
hd44780_write( 0b00000001 );
}
void hd44780_newline()
{
hd44780_write( 0xC0 );
}
