Fix

MK/module/lcd/ultralcd.cpp

@@ -839,7 +839,7 @@ static void lcd_prepare_menu() {
   // Level Bed
   //
   #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    if (axis_known_position & (BIT(X_AXIS)|BIT(Y_AXIS)) == BIT(X_AXIS)|BIT(Y_AXIS)) {
+    if (axis_known_position & (BIT(X_AXIS)|BIT(Y_AXIS)) == BIT(X_AXIS)|BIT(Y_AXIS))
       MENU_ITEM(gcode, MSG_LEVEL_BED, PSTR("G29"));
   #elif !MECH(DELTA) && DISABLED(Z_SAFE_HOMING) && Z_HOME_DIR < 0
     MENU_ITEM(submenu, MSG_MBL_SETTING, config_lcd_level_bed);

MK/module/lcd/ultralcd_st7920_u8glib_rrd.h

@@ -22,21 +22,15 @@
 static void ST7920_SWSPI_SND_8BIT(uint8_t val) {
   uint8_t i;
   for (i = 0; i < 8; i++) {
-    WRITE(ST7920_CLK_PIN,0);
-    #if F_CPU == 20000000
-      __asm__("nop\n\t");
-    #endif
-    WRITE(ST7920_DAT_PIN,val&0x80);
+    digitalWrite(ST7920_CLK_PIN, 0);
+    digitalWrite(ST7920_DAT_PIN, val&0x80); 
     val<<=1;
-    WRITE(ST7920_CLK_PIN,1);
-    #if F_CPU == 20000000
-      __asm__("nop\n\t""nop\n\t");
-    #endif
+    digitalWrite(ST7920_CLK_PIN,1);
   }
 }
 
-#define ST7920_CS()              {WRITE(ST7920_CS_PIN,1);u8g_10MicroDelay();}
-#define ST7920_NCS()             {WRITE(ST7920_CS_PIN,0);}
+#define ST7920_CS()              {digitalWrite(ST7920_CS_PIN, 1); u8g_10MicroDelay();}
+#define ST7920_NCS()             {digitalWrite(ST7920_CS_PIN,0);}
 #define ST7920_SET_CMD()         {ST7920_SWSPI_SND_8BIT(0xf8);u8g_10MicroDelay();}
 #define ST7920_SET_DAT()         {ST7920_SWSPI_SND_8BIT(0xfa);u8g_10MicroDelay();}
 #define ST7920_WRITE_BYTE(a)     {ST7920_SWSPI_SND_8BIT((uint8_t)((a)&0xf0u));ST7920_SWSPI_SND_8BIT((uint8_t)((a)<<4u));u8g_10MicroDelay();}

MK/module/motion/stepper.cpp

@@ -297,7 +297,7 @@ void checkHitEndstops() {
           card.sdprinting = false;
           card.closeFile();
         #endif
-        for (int i = 0; i < 3; i++) axis_known_position[i] = false; // not homed anymore
+        for (int i = 0; i < 3; i++) BITCLR(axis_known_position, i); // not homed anymore
         quickStop(); // kill the planner buffer
         Stop();      // restart by M999
       }