If no "B" parameter given, get 1 byte

9 years ago · aaeadf0cbd
1 changed files with 1 additions and 1 deletions
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@ -5038,7 +5038,7 @@ inline void gcode_M121() { endstops.enable_globally(false); }
   */
  inline void gcode_M156() {
    uint8_t addr = code_seen('A') ? code_value_short() : 0;
-    int bytes    = code_seen('B') ? code_value_short() : 0;
+    int bytes    = code_seen('B') ? code_value_short() : 1;
    if (addr && bytes > 0 && bytes <= 32) {
      i2c.address(addr);