rekahsoft/avr-lcd-lib
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Implemented eraseDisplay function

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Signed-off-by: Collin J. Doering <collin.doering@rekahsoft.ca>
This commit is contained in:
Collin J. Doering 2015-10-28 04:20:35 -04:00
parent b98e632856
commit 3fcbf653a9
1 changed files with 26 additions and 0 deletions
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26
lcdLib.c
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@ -679,15 +679,41 @@ void moveCursorToColumn(uint8_t n) {
}
void eraseDisplay(uint8_t n) {
uint8_t old_row, old_column;
getCursorPosition(&old_row, &old_column);
switch (n) {
case 0: // Clear from cursor to end of screen
{
uint8_t len = (LCD_NUMBER_OF_LINES - old_row)*LCD_CHARACTERS_PER_LINE + (LCD_CHARACTERS_PER_LINE - old_column);
for (uint8_t i = 0; i < len; i++)
writeCharToLCD(' ');
// Write last char without scrolling
loop_until_LCD_BF_clear();
writeCharToLCD_(' ');
break;
}
case 1: // Clear from cursor to beginning of screen
{
uint8_t len = (old_row - 1)*LCD_CHARACTERS_PER_LINE + old_column;
returnHome();
for (uint8_t i = 0; i < len; i++)
writeCharToLCD(' ');
// Write last char without scrolling
loop_until_LCD_BF_clear();
writeCharToLCD_(' ');
break;
}
case 2: // Clear entire screen
clearDisplay();
break;
default: // Invalid argument; do nothing
break;
}
setCursorPosition(old_row, old_column);
}
void eraseInline(uint8_t n) {