//non-core stuff --------------------------------------
//move the cursor to the given absolute position. line numbers start at 1.
//if this is not a 2-line LCD4Bit_mod instance, will always position on first line.
void cursorTo(int line_num, int x){
//if we are on a 1-line display, set line_num to 1st line, regardless of given
//offset 40 chars in if second line requested
x += 0x40*(((g_num_lines>line_num)?line_num:g_num_lines)-1);
commandWrite(CMD_DDADDR(x));
cursor_pos=x;
}
void set_char_at(char c, int line_num, int x)
{
uint8_t orig_cursor=cursor_pos;
//move cursor
cursorTo(line_num, x);
//write
dataWrite(c);
//restore cursor
commandWrite(CMD_DDADDR(orig_cursor));
cursor_pos=orig_cursor;
}
/*
* function to redirect stdout to lcd by FDEV_SETUP_STREAM() macro
* Sends a character to the LCD display.
* '\n' clears the display after the *next* character
* '\r' sets the cursor address to begin of 2nd line
*/
int lcd_putchar(char c, FILE *unused)
{
static char nl_seen;
if (nl_seen && c != '\n') {
// first character after newline, clear display and home cursor.
clear();
nl_seen = 0;
}
if (c == '\n') {
nl_seen = 1;
}
else if (c != '\r') {
dataWrite(c);
} else {
commandWrite(CMD_DDADDR(64));
}
return 0;
}
extern void lcd_cursor_addr(int pos){
commandWrite(CMD_DDADDR(pos));
_delay_us(1000);
}
