char lcd_getc(BYTE x, BYTE y)
{
char value;
lcd_gotoxy(x,y);
while ( bit_test(lcd_read_byte(),7) ); // wait until busy flag is low
lcd_output_rs(1);
value = lcd_read_byte();
lcd_output_rs(0);
return(value);
}
void lcd_send_byte(BYTE address, BYTE n)
{
lcd_output_rs(0);
while ( bit_test(lcd_read_byte(),7) ) ;
lcd_output_rs(address);
delay_cycles(1);
lcd_output_rw(0);
delay_cycles(1);
lcd_output_enable(0);
lcd_send_nibble(n >> 4);
lcd_send_nibble(n & 0xf);
}
void lcd_init(void)
{
BYTE i;
#if defined(__PCB__)
set_tris_lcd(LCD_OUTPUT_MAP);
#else
#if (defined(LCD_DATA4) && defined(LCD_DATA5) && defined(LCD_DATA6) && defined(LCD_DATA7))
output_drive(LCD_DATA4);
output_drive(LCD_DATA5);
output_drive(LCD_DATA6);
output_drive(LCD_DATA7);
#else
lcdtris.data = 0x0;
#endif
lcd_enable_tris();
lcd_rs_tris();
lcd_rw_tris();
#endif
lcd_output_rs(0);
lcd_output_rw(0);
lcd_output_enable(0);
delay_ms(15);
for(i=1;i<=3;++i)
{
lcd_send_nibble(3);
delay_ms(5);
}
lcd_send_nibble(2);
for(i=0;i<=3;++i)
lcd_send_byte(0,LCD_INIT_STRING[i]);
}
void dsp_strength_bar( int8 end_signal_char_index,
int8 width, int8 value )
{
int8 mark_pos = value/STRENGTH_VALUES_PER_CHAR;
int8 mark_glyph = value-(mark_pos*STRENGTH_VALUES_PER_CHAR);
lcd_output_rs(0);
int8 current_address = lcd_read_byte() & 0x7F;
dsp_create_signal_character( end_signal_char_index, mark_glyph );
lcd_send_byte( 0, 0x80|current_address ); //Restore DDRAM address
int8 i;
for( i=0; i<mark_pos; ++i ) {
lcd_putc(CHAR_FULL_STRENGTH);
}
if ( mark_pos != width ) {
lcd_putc(end_signal_char_index);
}
for( i=mark_pos+1; i<width; ++i ) {
lcd_putc(' ');
}
}
/*
* Display a range bar with:
* - 3 possibles values per position in mid characters
* - 2 possibles values per position in start and end characters
* Note: Only one range line is allowed.
*/
void dsp_range_line( int8 start_char_index,
int8 mid_char_index,
int8 end_char_index,
int8 width, int16 value,
int16 max_value )
{
int8 range_positions = (3*(width-2)) + 2 + 2;
int8 mark = math_change_range(value, max_value, range_positions);
int8 start_glyph;
int8 end_glyph;
int8 mark_glyph;
int8 mark_pos;
if ( mark < 2 ) { //Mark at start range
mark_pos = 0;
mark_glyph = 0xFF;
start_glyph = mark;
end_glyph = 2;
}
else if ( mark > (range_positions-2) ) { //Mark at end range
mark_pos = 0;
mark_glyph = 0xFF;
start_glyph = 2;
end_glyph = (range_positions-mark);
}
else if ( mark == (range_positions-2) ) { //Mark just before end range
mark_pos = 0;
mark_glyph = 0xFF;
start_glyph = 2;
end_glyph = 1;
}
else { //Mark at mid range
mark -= 2;
mark_pos = mark/3;
mark_glyph = mark-(mark_pos*3);
start_glyph = 2;
end_glyph = 2;
}
lcd_output_rs(0);
int8 current_address = lcd_read_byte() & 0x7F;
// Set glyphs
dsp_write_mid_glyph( start_char_index,
CHAR_START_RANGE_MID_GLYPH[start_glyph] );
dsp_write_mid_glyph( end_char_index,
CHAR_END_RANGE_MID_GLYPH[end_glyph] );
if ( mark_glyph != 0xFF ) {
dsp_write_mid_glyph( mid_char_index,
CHAR_RANGE_POSITION_GLYPH[mark_glyph] );
}
lcd_send_byte( 0, 0x80|current_address ); //Restore DDRAM address
// Write range line
int8 i;
lcd_putc(start_char_index);
for( i=0; i<mark_pos; ++i ) {
lcd_putc('-');
}
lcd_putc( (mark_glyph==0xFF) ? '-' : mid_char_index);
for( i=mark_pos+1; i<(width-2); ++i ) {
lcd_putc('-');
}
lcd_putc(end_char_index);
}
