void lcd_col(char chr)
{
lcd_base_addr(lcdCacheIdx);
lcd_send(chr, LCD_DATA);
lcdCacheIdx++;
}
/* Displays a separator at current cursor location */
void lcd_sep()
{
lcd_base_addr(lcdCacheIdx);
// 5 pixel wide characters and add space
lcd_send(0x44, LCD_DATA);
lcd_send(0, LCD_DATA);
lcdCacheIdx += 2;
}
// Clears an area on a line
void lcd_clear_area(unsigned char line, unsigned char startX, unsigned char endX)
{
// Start and end positions of line
int start = line * LCD_WIDTH + startX;
int end = line * LCD_WIDTH + endX;
lcd_base_addr(start);
// Clear all data in range from cache
for(unsigned int i = start; i < end; i++) lcd_send(0, LCD_DATA);
}
// Clears the display
void lcd_clear(void)
{
lcdCacheIdx = 0;
lcd_base_addr(lcdCacheIdx);
// Set the entire cache to zero and write 0s to lcd
int lcd_size = ((LCD_WIDTH * LCD_HEIGHT) / CHAR_HEIGHT);
for(int i=0;i<lcd_size;i++) lcd_send(0, LCD_DATA);
}
/* Clears the display */
void lcd_clear(void)
{
lcdCacheIdx = 0;
lcd_base_addr(lcdCacheIdx);
// Set the entire cache to zero and write 0s to lcd
for(int i=0;i<LCD_CACHE_SIZE;i++) {
lcd_send(0, LCD_DATA);
}
}
/* Displays a character at current cursor location */
void lcd_chr(char chr)
{
lcd_base_addr(lcdCacheIdx);
// 5 pixel wide characters and add space
for(unsigned char i=0;i<5;i++) {
lcd_send(pgm_read_byte(&font5x7[chr-32][i]) << 1, LCD_DATA);
}
lcd_send(0, LCD_DATA);
lcdCacheIdx += 6;
}
/* Clears an area on a line */
void lcd_clear_area(unsigned char line, unsigned char startX, unsigned char endX)
{
// Start and end positions of line
int start = (line-1)*84+(startX-1);
int end = (line-1)*84+(endX-1);
lcd_base_addr(start);
// Clear all data in range from cache
for(unsigned int i=start;i<end;i++) {
lcd_send(0, LCD_DATA);
}
}
/* Clears the display */
void lcd_clear(void)
{
int lcdCacheIdx = 0;
lcd_base_addr(lcdCacheIdx);
// Set the entire cache to zero and write 0s to lcd
for(int i=0;i<LCD_CACHE_SIZE;i++)
{
lcd_send(0, LCD_DATA);
lcd_buffer[ i ] = 0;
set_update_table( i );
}
}
// Displays a character at current cursor location or moves to new line if enter char is given
void lcd_chr(char chr)
{
if (chr == '\n') {
// move to next line and first column
lcdCacheIdx = lcdCacheIdx + LCD_WIDTH - lcdCacheIdx % LCD_WIDTH; //next line and x=0
} else {
lcd_base_addr(lcdCacheIdx);
// 5 pixel wide characters and add space
for(unsigned char i=0; i < CHAR_WIDTH - 1; i++)
lcd_send(pgm_read_byte(&font5x7[chr-32][i]) << 1, LCD_DATA);
lcd_send(0, LCD_DATA); // right empty separator line of 8 vertical pixels
lcdCacheIdx += CHAR_WIDTH;
}
}
//updates the necessary pieces of the lcd
void lcd_update_from_buffer( void )
{
//when two neighbor is needed to refresh, the lcd base point don't need to be updated, as the lcd increments it automaticly
unsigned char continous = 1;
for( unsigned int buffer_index = 0; buffer_index < LCD_CACHE_SIZE; buffer_index++ )
{
if( lcd_buffer_update_table[ buffer_index / 8 ] & ( 1<<(buffer_index%8) ) )
{
if( !continous) lcd_base_addr( buffer_index );
lcd_send( lcd_buffer[ buffer_index ] , LCD_DATA);
lcd_buffer_update_table[ buffer_index / 8 ] &= ~(1 << ( buffer_index % 8 ));
continous = 1;
}
else
{
continous = 0;
}
}
}
