add DEBUG_MATRIX_SCAN_RATE_ENABLE to common_features.mk (#10824)

Add a Make variable to easily enable DEBUG_MATRIX_SCAN_RATE on the command line. eg. ``` make DEBUG_MATRIX_SCAN_RATE_ENABLE=yes KEYBOARD:KEYMAP ```
qmk · Nov 10, 2020 · 28d6b9d · 28d6b9d
1 parent 2098d98
commit 28d6b9d
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diff --git a/common_features.mk b/common_features.mk
@@ -20,6 +20,11 @@ QUANTUM_SRC += \
     $(QUANTUM_DIR)/keymap_common.c \
     $(QUANTUM_DIR)/keycode_config.c
 
+ifeq ($(strip $(DEBUG_MATRIX_SCAN_RATE_ENABLE)), yes)
+    OPT_DEFS += -DDEBUG_MATRIX_SCAN_RATE
+    CONSOLE_ENABLE = yes
+endif
+
 ifeq ($(strip $(API_SYSEX_ENABLE)), yes)
     OPT_DEFS += -DAPI_SYSEX_ENABLE
     OPT_DEFS += -DAPI_ENABLE

diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
@@ -299,6 +299,10 @@ void keyboard_init(void) {
     dip_switch_init();
 #endif
 
+#if defined(DEBUG_MATRIX_SCAN_RATE) && defined(CONSOLE_ENABLE)
+    debug_enable = true;
+#endif
+
     keyboard_post_init_kb(); /* Always keep this last */
 }