8 files changed, 99 insertions, 7 deletions

diff --git a/apps/lang/english.lang b/apps/lang/english.lang
index ce2b300d8c..ffdc12b306 100644
--- a/apps/lang/english.lang
+++ b/apps/lang/english.lang
@@ -1842,3 +1842,8 @@ id: LANG_MOVE_FAILED
 desc: Error message displayed in playlist viewer
 eng: "Move failed"
 new:
+
+id: LANG_FLIP_DISPLAY
+desc: in settings_menu, option to turn display+buttos by 180 degreed
+eng: "Upside Down"
+new:
diff --git a/apps/settings.c b/apps/settings.c
index 3c56257db4..b2fa22170b 100644
--- a/apps/settings.c
+++ b/apps/settings.c
@@ -103,6 +103,7 @@ offset  abs
 0x1a    0x2e    <time until disk spindown>
 0x1b    0x2f    <browse current, play selected, recursive dir insert>
 0x1c    0x30    <peak meter hold timeout (bit 0-4),
+                 flip_display (bit 6)
                  rec_editable (bit 7)>
 0x1d    0x31    <(int) Resume shuffle seed, or -1 if no shuffle>
 0x21    0x35    <repeat mode (bit 0-1), rec. channels (bit 2),
@@ -362,6 +363,7 @@ int settings_save( void )
          ((global_settings.recursive_dir_insert & 3) << 2));
     
     config_block[0x1c] = (unsigned char)global_settings.peak_meter_hold |
+        (global_settings.flip_display ? 0x40 : 0) |
         (global_settings.rec_editable?0x80:0);
 
     memcpy(&config_block[0x1d], &global_settings.resume_seed, 4);
@@ -516,6 +518,9 @@ void settings_apply(void)
 
 #ifdef HAVE_LCD_BITMAP
     lcd_set_invert_display(global_settings.invert);
+    lcd_set_flip(global_settings.flip_display);
+    button_set_flip(global_settings.flip_display);
+    lcd_update(); /* refresh after flipping the screen */
     settings_apply_pm_range();
     peak_meter_init_times(
         global_settings.peak_meter_release, global_settings.peak_meter_hold, 
@@ -660,6 +665,8 @@ void settings_load(void)
 
         if (config_block[0x1c] != 0xFF) {
             global_settings.peak_meter_hold = (config_block[0x1c]) & 0x1f;
+            global_settings.flip_display =
+                (config_block[0x1c] & 0x40)?true:false;
             global_settings.rec_editable =
                 (config_block[0x1c] & 0x80)?true:false;
         }
@@ -970,6 +977,8 @@ bool settings_load_config(char* file)
             set_cfg_bool(&global_settings.scrollbar, value);
         else if (!strcasecmp(name, "invert"))
             set_cfg_bool(&global_settings.invert, value);
+        else if (!strcasecmp(name, "flip diplay"))
+            set_cfg_bool(&global_settings.flip_display, value);
         else if (!strcasecmp(name, "invert cursor"))
             set_cfg_bool(&global_settings.invert_cursor, value);
         else if (!strcasecmp(name, "show icons"))
@@ -1295,6 +1304,8 @@ bool settings_save_config(void)
 #ifdef HAVE_LCD_BITMAP
     fprintf(fd, "invert: %s\r\n", boolopt[global_settings.invert]);
     
+    fprintf(fd, "flip display: %s\r\n", boolopt[global_settings.flip_display]);
+
     fprintf(fd, "invert cursor: %s\r\n",
             boolopt[global_settings.invert_cursor]);
 
@@ -1446,6 +1457,7 @@ void settings_reset(void) {
     global_settings.resume      = RESUME_ASK;
     global_settings.contrast    = lcd_default_contrast();
     global_settings.invert      = DEFAULT_INVERT_SETTING;
+    global_settings.flip_display= false;
     global_settings.poweroff    = DEFAULT_POWEROFF_SETTING;
     global_settings.backlight_timeout   = DEFAULT_BACKLIGHT_TIMEOUT_SETTING;
     global_settings.invert_cursor = DEFAULT_INVERT_CURSOR_SETTING;
diff --git a/apps/settings.h b/apps/settings.h
index b96f4c6410..074be0690a 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -92,6 +92,7 @@ struct user_settings
     bool invert;    /* invert display */
     bool invert_cursor; /* invert the current file in dir browser and menu
                            instead of using the default cursor */
+    bool flip_display; /* turn display (and button layout) by 180 degrees */
     int poweroff;   /* power off timer */
     int backlight_timeout;  /* backlight off timeout:  0-18 0=never,
                                1=always,
diff --git a/apps/settings_menu.c b/apps/settings_menu.c
index c26aa125a2..c3932f3264 100644
--- a/apps/settings_menu.c
+++ b/apps/settings_menu.c
@@ -107,6 +107,20 @@ static bool invert_cursor(void)
 }
 
 /**
+ * Menu to turn the display+buttons by 180 degrees
+ */
+static bool flip_display(void)
+{
+    bool rc = set_bool( str(LANG_FLIP_DISPLAY),
+                        &global_settings.flip_display);
+    
+    button_set_flip(global_settings.flip_display);
+    lcd_set_flip(global_settings.flip_display);
+
+    return rc;
+}
+
+/**
  * Menu to configure the battery display on status bar
  */
 static bool battery_type(void)
@@ -362,7 +376,7 @@ static bool peak_meter_menu(void)
         { str(LANG_PM_MAX)      , peak_meter_max       },
     };
     
-    m=menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
     return result;
@@ -757,7 +771,7 @@ static bool playback_settings_menu(void)
 
     bool old_shuffle = global_settings.playlist_shuffle;
     
-    m=menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
 
@@ -836,7 +850,7 @@ static bool fileview_settings_menu(void)
         { str(LANG_FOLLOW),       browse_current      },
     };
 
-    m = menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
     return result;
@@ -861,7 +875,7 @@ static bool scroll_settings_menu(void)
 #endif
     };
 
-    m = menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
     return result;
@@ -884,6 +898,7 @@ static bool display_settings_menu(void)
         { str(LANG_STATUS_BAR),      status_bar },
         { str(LANG_INVERT),          invert },
         { str(LANG_INVERT_CURSOR),   invert_cursor },
+        { str(LANG_FLIP_DISPLAY),    flip_display },
         { str(LANG_PM_MENU),         peak_meter_menu },  
         { str(LANG_VOLUME_DISPLAY),  volume_type },
         { str(LANG_BATTERY_DISPLAY), battery_type },
@@ -892,7 +907,7 @@ static bool display_settings_menu(void)
         { str(LANG_CAPTION_BACKLIGHT), caption_backlight },
     };
     
-    m=menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
     return result;
@@ -929,7 +944,7 @@ static bool system_settings_menu(void)
         { str(LANG_RESET),          reset_settings },
     };
     
-    m=menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
     return result;
@@ -954,7 +969,7 @@ bool settings_menu(void)
         { str(LANG_SAVE_SETTINGS),   settings_save_config   },
     };
     
-    m = menu_init( items, sizeof items / sizeof(struct menu_items) );
+    m=menu_init( items, sizeof(items) / sizeof(*items) );
     result = menu_run(m);
     menu_exit(m);
     return result;
diff --git a/firmware/drivers/button.c b/firmware/drivers/button.c
index c0cd046db6..cfe98e298a 100644
--- a/firmware/drivers/button.c
+++ b/firmware/drivers/button.c
@@ -34,6 +34,9 @@
 struct event_queue button_queue;
 
 long last_keypress;
+#ifdef HAVE_RECORDER_KEYPAD
+static bool flipped; /* bottons can be flipped to match the LCD flip */
+#endif
 
 /* how often we check to see if a button is pressed */
 #define POLL_FREQUENCY    HZ/20
@@ -212,6 +215,47 @@ void button_init()
 #endif
     queue_init(&button_queue);
     tick_add_task(button_tick);
+    last_keypress = current_tick;
+    flipped = false;
+}
+
+
+/*
+ * set the flip attribute
+ * better only call this when the queue is empty
+ */
+void button_set_flip(bool flip)
+{
+    flipped = flip;
+}
+
+
+/*
+ * helper function to swap UP/DOWN, LEFT/RIGHT, F1/F3
+ */
+static int button_flip(int button)
+{
+    int newbutton;
+
+    newbutton = button & 
+        ~(BUTTON_UP | BUTTON_DOWN
+        | BUTTON_LEFT | BUTTON_RIGHT 
+        | BUTTON_F1 | BUTTON_F3);
+
+    if (button & BUTTON_UP)
+        newbutton |= BUTTON_DOWN;
+    if (button & BUTTON_DOWN)
+        newbutton |= BUTTON_UP;
+    if (button & BUTTON_LEFT)
+        newbutton |= BUTTON_RIGHT;
+    if (button & BUTTON_RIGHT)
+        newbutton |= BUTTON_LEFT;
+    if (button & BUTTON_F1)
+        newbutton |= BUTTON_F3;
+    if (button & BUTTON_F3)
+        newbutton |= BUTTON_F1;
+
+    return newbutton;
 }
 
 /*
@@ -276,6 +320,9 @@ static int button_read(void)
 #endif
         }
     }
+
+    if (btn && flipped)
+        return button_flip(btn); /* swap upside down */
   
     return btn;
 }
diff --git a/firmware/export/button.h b/firmware/export/button.h
index 8500adaeb8..efe3684473 100644
--- a/firmware/export/button.h
+++ b/firmware/export/button.h
@@ -29,6 +29,9 @@ extern long last_keypress;
 void button_init (void);
 int button_get (bool block);
 int button_get_w_tmo(int ticks);
+#ifdef HAVE_RECORDER_KEYPAD
+void button_set_flip(bool flip); /* turn 180 degrees */
+#endif
 
 #define BUTTON_NONE             0x0000
 
diff --git a/uisimulator/common/lcd-common.c b/uisimulator/common/lcd-common.c
index 719c61b488..0b0d3e0716 100644
--- a/uisimulator/common/lcd-common.c
+++ b/uisimulator/common/lcd-common.c
@@ -41,3 +41,7 @@ void lcd_blit(unsigned char* p_data, int x, int y, int width, int height,
     (void)stride;
 }
     
+void lcd_set_flip(bool yesno)
+{
+    (void)yesno;
+}
\ No newline at end of file
diff --git a/uisimulator/common/stubs.c b/uisimulator/common/stubs.c
index d3e5189d49..533b909786 100644
--- a/uisimulator/common/stubs.c
+++ b/uisimulator/common/stubs.c
@@ -220,3 +220,8 @@ void cpu_sleep(bool enabled)
 {
     (void)enabled;
 }
+
+void button_set_flip(bool yesno)
+{
+    (void)yesno;
+}