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Adaptive screen updates for all kinds of displays

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The target here is to update the screens of graphical and char base
displays as fast as possible, without draining the planner buffer too much.

For that measure the time it takes to draw and transfer one
(partial) screen to the display. Build a max. value from that.
Because ther can be large differences, depending on how much the display
updates are interrupted, the max value is decreased by one ms/s. This way
it can shrink again.
On the other side we keep track on how much time it takes to empty the
planner buffer.
Now we draw the next (partial) display update only then, when we do not
drain the planner buffer to much. We draw only when the time in the
buffer is two times larger than a update takes, or the buffer is empty anyway.

When we have begun to draw a screen we do not wait until the next 100ms
time slot comes. We draw the next partial screen as fast as possible, but
give the system a chance to refill the buffers a bit.

When we see, during drawing a screen, the screen contend has changed,
we stop the current draw and begin to draw the new content from the top.
This commit is contained in:
AnHardt
2016-12-12 14:35:02 +01:00
parent 0772c8e55f
commit d0e24e0876
23 changed files with 98 additions and 644 deletions
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151
Marlin/ultralcd.cpp
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@@ -64,6 +64,8 @@ void lcd_status_screen();
millis_t next_lcd_update_ms;
uint8_t lcdDrawUpdate = LCDVIEW_CLEAR_CALL_REDRAW; // Set when the LCD needs to draw, decrements after every draw. Set to 2 in LCD routines so the LCD gets at least 1 full redraw (first redraw is partial)
millis_t max_display_update_time = 0;
#if ENABLED(DOGLCD)
bool drawing_screen = false;
#endif
@@ -2893,7 +2895,11 @@ void lcd_update() {
#endif //SDSUPPORT && SD_DETECT_PIN
millis_t ms = millis();
if (ELAPSED(ms, next_lcd_update_ms)) {
if (ELAPSED(ms, next_lcd_update_ms)
#if ENABLED(DOGLCD)
|| drawing_screen
#endif
) {
next_lcd_update_ms = ms + LCD_UPDATE_INTERVAL;
@@ -2954,101 +2960,98 @@ void lcd_update() {
}
#endif // ULTIPANEL
#if ENABLED(ENSURE_SMOOTH_MOVES) && ENABLED(ALWAYS_ALLOW_MENU)
#define STATUS_UPDATE_CONDITION planner.long_move()
#else
#define STATUS_UPDATE_CONDITION true
#endif
#if ENABLED(ENSURE_SMOOTH_MOVES) && DISABLED(ALWAYS_ALLOW_MENU)
#define LCD_HANDLER_CONDITION planner.long_move()
#else
#define LCD_HANDLER_CONDITION true
#endif
// We arrive here every ~100ms when idling 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 (STATUS_UPDATE_CONDITION &&
if (
#if ENABLED(ULTIPANEL)
currentScreen == lcd_status_screen &&
#endif
!lcd_status_update_delay--
!lcd_status_update_delay--
) {
lcd_status_update_delay = 9;
lcd_status_update_delay = 9
#if ENABLED(DOGLCD)
+ 3
#endif
;
max_display_update_time--;
lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
}
if (LCD_HANDLER_CONDITION) {
#if ENABLED(DOGLCD)
if (lcdDrawUpdate || drawing_screen)
#else
if (lcdDrawUpdate)
#endif
{
#if ENABLED(DOGLCD)
if (!drawing_screen)
#endif
{
switch (lcdDrawUpdate) {
case LCDVIEW_CALL_NO_REDRAW:
lcdDrawUpdate = LCDVIEW_NONE;
break;
case LCDVIEW_CLEAR_CALL_REDRAW: // set by handlers, then altered after (rarely occurs here)
case LCDVIEW_CALL_REDRAW_NEXT: // set by handlers, then altered after (never occurs here?)
lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
case LCDVIEW_REDRAW_NOW: // set above, or by a handler through LCDVIEW_CALL_REDRAW_NEXT
case LCDVIEW_NONE:
break;
} // switch
}
#if ENABLED(ULTIPANEL)
#define CURRENTSCREEN() (*currentScreen)(), lcd_clicked = false
#else
#define CURRENTSCREEN() lcd_status_screen()
#endif
#if ENABLED(DOGLCD) // Changes due to different driver architecture of the DOGM display
if (!drawing_screen) {
u8g.firstPage();
drawing_screen = 1;
}
lcd_setFont(FONT_MENU);
CURRENTSCREEN();
if (drawing_screen && (drawing_screen = u8g.nextPage())) return;
#else
CURRENTSCREEN();
#endif
}
#if ENABLED(ULTIPANEL)
// Return to Status Screen after a timeout
if (currentScreen == lcd_status_screen || defer_return_to_status)
return_to_status_ms = ms + LCD_TIMEOUT_TO_STATUS;
else if (ELAPSED(ms, return_to_status_ms))
lcd_return_to_status();
#endif // ULTIPANEL
millis_t bbr = planner.block_buffer_runtime();
#if ENABLED(DOGLCD)
if ((lcdDrawUpdate || drawing_screen) && (!bbr || (bbr > max_display_update_time * 2000)))
#else
if (lcdDrawUpdate && (!bbr || (bbr > max_display_update_time * 2000)))
#endif
{
#if ENABLED(DOGLCD)
if (!drawing_screen)
#endif
{
switch (lcdDrawUpdate) {
case LCDVIEW_CLEAR_CALL_REDRAW:
lcd_implementation_clear();
case LCDVIEW_CALL_REDRAW_NEXT:
lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
break;
case LCDVIEW_REDRAW_NOW:
case LCDVIEW_CALL_NO_REDRAW:
lcdDrawUpdate = LCDVIEW_NONE;
break;
case LCDVIEW_CLEAR_CALL_REDRAW: // set by handlers, then altered after (rarely occurs here)
case LCDVIEW_CALL_REDRAW_NEXT: // set by handlers, then altered after (never occurs here?)
lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
case LCDVIEW_REDRAW_NOW: // set above, or by a handler through LCDVIEW_CALL_REDRAW_NEXT
case LCDVIEW_NONE:
break;
} // switch
}
} // LCD_HANDLER_CONDITION
#if ENABLED(ULTIPANEL)
#define CURRENTSCREEN() (*currentScreen)(), lcd_clicked = false
#else
#define CURRENTSCREEN() lcd_status_screen()
#endif
#if ENABLED(DOGLCD) // Changes due to different driver architecture of the DOGM display
if (!drawing_screen) {
u8g.firstPage();
drawing_screen = 1;
}
lcd_setFont(FONT_MENU);
CURRENTSCREEN();
if (drawing_screen && (drawing_screen = u8g.nextPage())) {
max_display_update_time = max(max_display_update_time, millis() - ms);
return;
}
#else
CURRENTSCREEN();
#endif
max_display_update_time = max(max_display_update_time, millis() - ms);
}
#if ENABLED(ULTIPANEL)
// Return to Status Screen after a timeout
if (currentScreen == lcd_status_screen || defer_return_to_status)
return_to_status_ms = ms + LCD_TIMEOUT_TO_STATUS;
else if (ELAPSED(ms, return_to_status_ms))
lcd_return_to_status();
#endif // ULTIPANEL
#if ENABLED(DOGLCD)
if (!drawing_screen)
#endif
{
switch (lcdDrawUpdate) {
case LCDVIEW_CLEAR_CALL_REDRAW:
lcd_implementation_clear();
case LCDVIEW_CALL_REDRAW_NEXT:
lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
break;
case LCDVIEW_REDRAW_NOW:
lcdDrawUpdate = LCDVIEW_NONE;
break;
case LCDVIEW_NONE:
break;
} // switch
}
} // ELAPSED(ms, next_lcd_update_ms)
}