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Speedup sreen update delay

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Speedup sreen update delay
and correct a comment.

A module division by 10 is slooooow. (powers of 2 are fast - but then you can AND a bitmask with the same result)
This commit is contained in:
AnHardt 2016-05-19 15:41:09 +02:00
parent b422e39016
commit 0c4d885d5b
1 changed files with 6 additions and 3 deletions
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9
Marlin/ultralcd.cpp
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@ -282,7 +282,6 @@ menuPosition menu_history[10];
uint8_t menu_history_depth = 0;
millis_t next_lcd_update_ms;
uint8_t lcd_status_update_delay;
bool ignore_click = false;
bool wait_for_unclick;
bool defer_return_to_status = false;
@ -2248,9 +2247,13 @@ void lcd_update() {
}
#endif //ULTIPANEL
// Simply redraw the Info Screen 10 times a second
if (currentMenu == lcd_status_screen && !(++lcd_status_update_delay % 10))
// Here we arrive every ~100ms when ideling often enough.
// Instead of tracking the changes simply redraw the Info Screen ~1 time a second.
static int8_t lcd_status_update_delay = 1; // first update one loop delayed
if (currentMenu == lcd_status_screen && !lcd_status_update_delay--) {
lcd_status_update_delay = 9;
lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
}
if (lcdDrawUpdate) {