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Lightweight status screen for ST7920

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- This status screen uses the ST7920 character generator to greatly
  reduce SPI traffic and MCU load when updating the status screen.

- Has been tested with the RepRapDiscount Full Graphics Smart Controller
  but should work with any LCD that uses an ST7920 or fully compatible
  controller.
This commit is contained in:
Marcio Teixeira
2018-02-14 14:43:54 -07:00
committed by Scott Lahteine
parent 59c98d6fd5
commit 532bb3aaa1
10 changed files with 1522 additions and 431 deletions
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40
Marlin/src/lcd/ultralcd.cpp
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@ -5141,20 +5141,34 @@ void lcd_update() {
#endif
#if ENABLED(DOGLCD)
if (!drawing_screen) { // If not already drawing pages
u8g.firstPage(); // Start the first page
drawing_screen = 1; // Flag as drawing pages
}
lcd_setFont(FONT_MENU); // Setup font for every page draw
u8g.setColorIndex(1); // And reset the color
CURRENTSCREEN(); // Draw and process the current screen
#if ENABLED(LIGHTWEIGHT_UI)
#if ENABLED(ULTIPANEL)
const bool in_status = currentScreen == lcd_status_screen;
#else
constexpr bool in_status = true;
#endif
const bool do_u8g_loop = !in_status;
lcd_in_status(in_status);
if (in_status) lcd_status_screen();
#else
constexpr bool do_u8g_loop = true;
#endif
if (do_u8g_loop) {
if (!drawing_screen) { // If not already drawing pages
u8g.firstPage(); // Start the first page
drawing_screen = 1; // Flag as drawing pages
}
lcd_setFont(FONT_MENU); // Setup font for every page draw
u8g.setColorIndex(1); // And reset the color
CURRENTSCREEN(); // Draw and process the current screen
// The screen handler can clear drawing_screen for an action that changes the screen.
// If still drawing and there's another page, update max-time and return now.
// The nextPage will already be set up on the next call.
if (drawing_screen && (drawing_screen = u8g.nextPage())) {
NOLESS(max_display_update_time, millis() - ms);
return;
// The screen handler can clear drawing_screen for an action that changes the screen.
// If still drawing and there's another page, update max-time and return now.
// The nextPage will already be set up on the next call.
if (drawing_screen && (drawing_screen = u8g.nextPage())) {
NOLESS(max_display_update_time, millis() - ms);
return;
}
}
#else
CURRENTSCREEN();