1 files changed, 106 insertions, 0 deletions
diff --git a/Marlin/src/lcd/dogm/status_screen_lite_ST7920.h b/Marlin/src/lcd/dogm/status_screen_lite_ST7920.h
new file mode 100644
index 0000000..b217246
--- /dev/null
+++ b/Marlin/src/lcd/dogm/status_screen_lite_ST7920.h
@@ -0,0 +1,106 @@
+/**
+ * Lightweight Status Screen for the RepRapDiscount Full
+ * Graphics Smart Controller (ST7920-based 128x64 LCD)
+ *
+ * (c) 2017 Aleph Objects, Inc.
+ *
+ * The code in this page is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GNU GPL) as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option)
+ * any later version.  The code is distributed WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.
+ */
+#pragma once
+
+#include "../../HAL/shared/HAL_ST7920.h"
+
+#include "../../core/types.h"
+#include "../../core/macros.h"
+#include "../../libs/duration_t.h"
+
+class ST7920_Lite_Status_Screen {
+  private:
+    static struct st7920_state_t {
+      uint8_t synced   : 1; // Whether a sync has been sent
+      uint8_t cmd      : 1; // Whether the sync was cmd or data
+      uint8_t extended : 1;
+      uint8_t graphics : 1;
+      uint8_t sa       : 1;
+    } current_bits;
+
+    static void cs()                        { ST7920_cs(); current_bits.synced = false; }
+    static void ncs()                       { ST7920_cs(); current_bits.synced = false; }
+    static void sync_cmd()                  { ST7920_set_cmd(); }
+    static void sync_dat()                  { ST7920_set_dat(); }
+    static void write_byte(const uint8_t w) { ST7920_write_byte(w); }
+
+    FORCE_INLINE static void write_word(const uint16_t w) {
+      write_byte((w >> 8) & 0xFF);
+      write_byte((w >> 0) & 0xFF);
+    }
+
+    static void cmd(const uint8_t cmd);
+    static void begin_data();
+
+    static void write_str(const char *str);
+    static void write_str(const char *str, const uint8_t len);
+    static void write_str_P(PGM_P const str);
+    static void write_number(const int16_t value, const uint8_t digits=3);
+
+    static void _extended_function_set(const bool extended, const bool graphics);
+    static void _scroll_or_addr_select(const bool sa);
+    static void reset_state_from_unknown();
+
+    static void home();
+    static void display_status(const bool display_on, const bool cursor_on, const bool blink_on);
+    static void extended_function_set(const bool extended);
+    static void graphics(const bool graphics);
+    static void entry_mode_select(const bool ac_increase, const bool shift);
+    static void scroll_or_addr_select(const bool sa);
+    static void set_ddram_address(const uint8_t addr);
+    static void set_cgram_address(const uint8_t addr);
+    static void set_gdram_address(const uint8_t x, const uint8_t y);
+
+    static void clear();
+    static void clear_ddram();
+    static void clear_gdram();
+
+    static void load_cgram_icon(const uint16_t addr, const void *data);
+    static void draw_gdram_icon(uint8_t x, uint8_t y, const void *data);
+
+    static uint8_t string_checksum(const char *str);
+
+  protected:
+    static void draw_degree_symbol(uint8_t x, uint8_t y, const bool draw);
+    static void draw_static_elements();
+    static void draw_progress_bar(const uint8_t value);
+    static void draw_fan_icon(const bool whichIcon);
+    static void draw_heat_icon(const bool whichIcon, const bool heating);
+    static void draw_temps(uint8_t line, const int16_t temp, const int16_t target, bool showTarget, bool targetStateChange);
+    static void draw_extruder_1_temp(const int16_t temp, const int16_t target, bool forceUpdate=false);
+    static void draw_extruder_2_temp(const int16_t temp, const int16_t target, bool forceUpdate=false);
+    static void draw_bed_temp(const int16_t temp, const int16_t target, bool forceUpdate=false);
+    static void draw_fan_speed(const uint8_t value);
+    static void draw_print_time(const duration_t &elapsed, char suffix=' ');
+    static void draw_feedrate_percentage(const uint16_t percentage);
+    static void draw_status_message();
+    static void draw_position(const xyze_pos_t &pos, bool position_known=true);
+
+    static bool indicators_changed();
+    static bool position_changed();
+    static bool blink_changed();
+    static bool status_changed();
+
+    static void update_indicators(const bool forceUpdate);
+    static void update_position(const bool forceUpdate, bool resetChecksum);
+    static void update_status_or_position(bool forceUpdate);
+    static void update_progress(const bool forceUpdate);
+
+  public:
+    static void update(const bool forceUpdate);
+    static void on_entry();
+    static void on_exit();
+    static void clear_text_buffer();
+};