Add Function level EECONFIG code for EEPROM (#3084)

* Add Function level EEPROM configuration

Add kb and user functions for EEPROM, and example of how to use it.

* Bug fixes and demo

* Additional cleanup

* Add EEPROM reset macro to example

* Forgot init function in list

* Move eeconfig_init_quantum function to quantum.c and actually set default layer

* See if removing weak quantum function fixes issue

* Fix travis compile error

* Remove ifdef blocks from EECONFIG so settings are always set

* Fix for ARM EEPROM updates

* Fix merge issues

* Fix potential STM32 EEPROM issues

2 files changed, 107 insertions, 40 deletions

diff --git a/tmk_core/common/eeconfig.c b/tmk_core/common/eeconfig.c
index 35de574a96..0fec410a9c 100644
--- a/tmk_core/common/eeconfig.c
+++ b/tmk_core/common/eeconfig.c
@@ -8,32 +8,54 @@
 #include "eeprom_stm32.h"
 #endif
 
-/** \brief eeconfig initialization
+extern uint32_t default_layer_state;
+/** \brief eeconfig enable
  *
  * FIXME: needs doc
  */
-void eeconfig_init(void)
-{
+__attribute__ ((weak))
+void eeconfig_init_user(void) {
+  // Reset user EEPROM value to blank, rather than to a set value
+  eeconfig_update_user(0);
+}
+
+__attribute__ ((weak))
+void eeconfig_init_kb(void) {
+  // Reset Keyboard EEPROM value to blank, rather than to a set value
+  eeconfig_update_kb(0);
+
+  eeconfig_init_user();
+}
+
+
+/*
+ * FIXME: needs doc
+ */
+void eeconfig_init_quantum(void) {
 #ifdef STM32F303xC
     EEPROM_format();
 #endif
-    eeprom_update_word(EECONFIG_MAGIC,          EECONFIG_MAGIC_NUMBER);
-    eeprom_update_byte(EECONFIG_DEBUG,          0);
-    eeprom_update_byte(EECONFIG_DEFAULT_LAYER,  0);
-    eeprom_update_byte(EECONFIG_KEYMAP,         0);
-    eeprom_update_byte(EECONFIG_MOUSEKEY_ACCEL, 0);
-#ifdef BACKLIGHT_ENABLE
-    eeprom_update_byte(EECONFIG_BACKLIGHT,      0);
-#endif
-#ifdef AUDIO_ENABLE
-    eeprom_update_byte(EECONFIG_AUDIO,             0xFF); // On by default
-#endif
-#if defined(RGBLIGHT_ENABLE) || defined(RGB_MATRIX_ENABLE)
-    eeprom_update_dword(EECONFIG_RGBLIGHT,      0);
-#endif
-#ifdef STENO_ENABLE
-    eeprom_update_byte(EECONFIG_STENOMODE,      0);
-#endif
+  eeprom_update_word(EECONFIG_MAGIC,          EECONFIG_MAGIC_NUMBER);
+  eeprom_update_byte(EECONFIG_DEBUG,          0);
+  eeprom_update_byte(EECONFIG_DEFAULT_LAYER,  0);
+  default_layer_state = 0;
+  eeprom_update_byte(EECONFIG_KEYMAP,         0);
+  eeprom_update_byte(EECONFIG_MOUSEKEY_ACCEL, 0);
+  eeprom_update_byte(EECONFIG_BACKLIGHT,      0);
+  eeprom_update_byte(EECONFIG_AUDIO,             0xFF); // On by default
+  eeprom_update_dword(EECONFIG_RGBLIGHT,      0);
+  eeprom_update_byte(EECONFIG_STENOMODE,      0);
+
+  eeconfig_init_kb();
+}
+
+/** \brief eeconfig initialization
+ *
+ * FIXME: needs doc
+ */
+void eeconfig_init(void) {
+
+  eeconfig_init_quantum();
 }
 
 /** \brief eeconfig enable
@@ -54,7 +76,7 @@ void eeconfig_disable(void)
 #ifdef STM32F303xC
     EEPROM_format();
 #endif
-    eeprom_update_word(EECONFIG_MAGIC, 0xFFFF);
+    eeprom_update_word(EECONFIG_MAGIC, EECONFIG_MAGIC_NUMBER_OFF);
 }
 
 /** \brief eeconfig is enabled
@@ -66,6 +88,15 @@ bool eeconfig_is_enabled(void)
     return (eeprom_read_word(EECONFIG_MAGIC) == EECONFIG_MAGIC_NUMBER);
 }
 
+/** \brief eeconfig is disabled
+ *
+ * FIXME: needs doc
+ */
+bool eeconfig_is_disabled(void)
+{
+    return (eeprom_read_word(EECONFIG_MAGIC) == EECONFIG_MAGIC_NUMBER_OFF);
+}
+
 /** \brief eeconfig read debug
  *
  * FIXME: needs doc
@@ -99,7 +130,6 @@ uint8_t eeconfig_read_keymap(void)      { return eeprom_read_byte(EECONFIG_KEYMA
  */
 void eeconfig_update_keymap(uint8_t val) { eeprom_update_byte(EECONFIG_KEYMAP, val); }
 
-#ifdef BACKLIGHT_ENABLE
 /** \brief eeconfig read backlight
  *
  * FIXME: needs doc
@@ -110,9 +140,8 @@ uint8_t eeconfig_read_backlight(void)      { return eeprom_read_byte(EECONFIG_BA
  * FIXME: needs doc
  */
 void eeconfig_update_backlight(uint8_t val) { eeprom_update_byte(EECONFIG_BACKLIGHT, val); }
-#endif
 
-#ifdef AUDIO_ENABLE
+
 /** \brief eeconfig read audio
  *
  * FIXME: needs doc
@@ -123,4 +152,28 @@ uint8_t eeconfig_read_audio(void)      { return eeprom_read_byte(EECONFIG_AUDIO)
  * FIXME: needs doc
  */
 void eeconfig_update_audio(uint8_t val) { eeprom_update_byte(EECONFIG_AUDIO, val); }
-#endif
+
+
+/** \brief eeconfig read kb
+ *
+ * FIXME: needs doc
+ */
+uint32_t eeconfig_read_kb(void)      { return eeprom_read_dword(EECONFIG_KEYBOARD); }
+/** \brief eeconfig update kb
+ *
+ * FIXME: needs doc
+ */
+
+void eeconfig_update_kb(uint32_t val) { eeprom_update_dword(EECONFIG_KEYBOARD, val); }
+/** \brief eeconfig read user
+ *
+ * FIXME: needs doc
+ */
+uint32_t eeconfig_read_user(void)      { return eeprom_read_dword(EECONFIG_USER); }
+/** \brief eeconfig update user
+ *
+ * FIXME: needs doc
+ */
+void eeconfig_update_user(uint32_t val) { eeprom_update_dword(EECONFIG_USER, val); }
+
+
diff --git a/tmk_core/common/eeconfig.h b/tmk_core/common/eeconfig.h
index fa498df48c..a45cb8b12d 100644
--- a/tmk_core/common/eeconfig.h
+++ b/tmk_core/common/eeconfig.h
@@ -23,36 +23,41 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 #define EECONFIG_MAGIC_NUMBER                       (uint16_t)0xFEED
+#define EECONFIG_MAGIC_NUMBER_OFF                   (uint16_t)0xFFFF
 
 /* eeprom parameteter address */
 #if !defined(STM32F303xC)
 #define EECONFIG_MAGIC                              (uint16_t *)0
-#define EECONFIG_DEBUG                              (uint8_t *)2
-#define EECONFIG_DEFAULT_LAYER                      (uint8_t *)3
-#define EECONFIG_KEYMAP                             (uint8_t *)4
-#define EECONFIG_MOUSEKEY_ACCEL                     (uint8_t *)5
-#define EECONFIG_BACKLIGHT                          (uint8_t *)6
-#define EECONFIG_AUDIO                              (uint8_t *)7
+#define EECONFIG_DEBUG                               (uint8_t *)2
+#define EECONFIG_DEFAULT_LAYER                       (uint8_t *)3
+#define EECONFIG_KEYMAP                              (uint8_t *)4
+#define EECONFIG_MOUSEKEY_ACCEL                      (uint8_t *)5
+#define EECONFIG_BACKLIGHT                           (uint8_t *)6
+#define EECONFIG_AUDIO                               (uint8_t *)7
 #define EECONFIG_RGBLIGHT                           (uint32_t *)8
 #define EECONFIG_UNICODEMODE                        (uint8_t *)12
 #define EECONFIG_STENOMODE                          (uint8_t *)13
 // EEHANDS for two handed boards
-#define EECONFIG_HANDEDNESS         				(uint8_t *)14
+#define EECONFIG_HANDEDNESS         			        	(uint8_t *)14
+#define EECONFIG_KEYBOARD                          (uint32_t *)15
+#define EECONFIG_USER                              (uint32_t *)19
 
 #else
 /* STM32F3 uses 16byte block. Reconfigure memory map */
 #define EECONFIG_MAGIC                              (uint16_t *)0
-#define EECONFIG_DEBUG                              (uint8_t *)1
-#define EECONFIG_DEFAULT_LAYER                      (uint8_t *)2
-#define EECONFIG_KEYMAP                             (uint8_t *)3
-#define EECONFIG_MOUSEKEY_ACCEL                     (uint8_t *)4
-#define EECONFIG_BACKLIGHT                          (uint8_t *)5
-#define EECONFIG_AUDIO                              (uint8_t *)6
+#define EECONFIG_DEBUG                               (uint8_t *)1
+#define EECONFIG_DEFAULT_LAYER                       (uint8_t *)2
+#define EECONFIG_KEYMAP                              (uint8_t *)3
+#define EECONFIG_MOUSEKEY_ACCEL                      (uint8_t *)4
+#define EECONFIG_BACKLIGHT                           (uint8_t *)5
+#define EECONFIG_AUDIO                               (uint8_t *)6
 #define EECONFIG_RGBLIGHT                           (uint32_t *)7
-#define EECONFIG_UNICODEMODE                        (uint8_t *)9
+#define EECONFIG_UNICODEMODE                         (uint8_t *)9
 #define EECONFIG_STENOMODE                          (uint8_t *)10
 // EEHANDS for two handed boards
-#define EECONFIG_HANDEDNESS         				(uint8_t *)11
+#define EECONFIG_HANDEDNESS                     		(uint8_t *)11
+#define EECONFIG_KEYBOARD                          (uint32_t *)12
+#define EECONFIG_USER                              (uint32_t *)14
 #endif
 
 /* debug bit */
@@ -73,8 +78,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 bool eeconfig_is_enabled(void);
+bool eeconfig_is_disabled(void);
 
 void eeconfig_init(void);
+void eeconfig_init_quantum(void);
+void eeconfig_init_kb(void);
+void eeconfig_init_user(void);
 
 void eeconfig_enable(void);
 
@@ -99,4 +108,9 @@ uint8_t eeconfig_read_audio(void);
 void eeconfig_update_audio(uint8_t val);
 #endif
 
+uint32_t eeconfig_read_kb(void);
+void eeconfig_update_kb(uint32_t val);
+uint32_t eeconfig_read_user(void);
+void eeconfig_update_user(uint32_t val);
+
 #endif