stm32f1xx EEPROM emulation (#3914)

* * Add stm32f1xx EEPROM emulation
* Fix eeprom update compare bug

Squashed commit of the following:

commit b8f248ae08cec0cd81ecbb8854d9b39221d4d573
Author: hsgw <urkwtky@gmail.com>
Date:   Sat Sep 15 19:13:48 2018 +0900

    fix EEPROM_update wrong compare

commit d4ed4e6ea864e967a3e17f7edee4b0c3b4a25541
Author: hsgw <urkwtky@gmail.com>
Date:   Sat Sep 15 17:43:47 2018 +0900

    eeprom fix initialization define

commit b61aa7c04d70c64df3416d63e5da08b73b6053af
Author: hsgw <urkwtky@gmail.com>
Date:   Sat Sep 15 16:33:40 2018 +0900

    maybe working

* Fix FLASH_KEY defines

tmk_core/common.mk

@@ -34,6 +34,13 @@ ifeq ($(PLATFORM),CHIBIOS)
   ifeq ($(MCU_SERIES), STM32F3xx)
     TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
     TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
+    TMK_COMMON_DEFS += -DEEPROM_EMU_STM32F303xC
+    TMK_COMMON_DEFS += -DSTM32_EEPROM_ENABLE
+  else ifeq ($(MCU_SERIES), STM32F1xx)
+    TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
+    TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
+    TMK_COMMON_DEFS += -DEEPROM_EMU_STM32F103xB
+    TMK_COMMON_DEFS += -DSTM32_EEPROM_ENABLE
   else
     TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_teensy.c
 endif

tmk_core/common/chibios/eeprom_stm32.c

@@ -574,7 +574,7 @@ uint16_t EEPROM_update(uint16_t Address, uint16_t Data)
 {
     uint16_t temp;
     EEPROM_read(Address, &temp);
-    if (Address == Data)
+    if (temp == Data)
         return EEPROM_SAME_VALUE;
     else
         return EEPROM_write(Address, Data);

tmk_core/common/chibios/eeprom_stm32.h

@@ -28,7 +28,13 @@
 
 // HACK ALERT. This definition may not match your processor
 // To Do. Work out correct value for EEPROM_PAGE_SIZE on the STM32F103CT6 etc
-#define MCU_STM32F303CC
+#if defined(EEPROM_EMU_STM32F303xC)
+  #define MCU_STM32F303CC
+#elif defined(EEPROM_EMU_STM32F103xB)
+  #define MCU_STM32F103RB
+#else
+  #error "not implemented."
+#endif
 
 #ifndef EEPROM_PAGE_SIZE
     #if defined (MCU_STM32F103RB)

tmk_core/common/chibios/flash_stm32.c

@@ -16,13 +16,21 @@
  * Modifications for QMK and STM32F303 by Yiancar
  */
 
-#define STM32F303xC
+#if defined(EEPROM_EMU_STM32F303xC)
+    #define STM32F303xC
+    #include "stm32f3xx.h"
+#elif defined(EEPROM_EMU_STM32F103xB)
+    #define STM32F103xB
+    #include "stm32f1xx.h"
+#else
+    #error "not implemented."
+#endif
 
-#include "stm32f3xx.h"
 #include "flash_stm32.h"
 
-#define FLASH_KEY1          ((uint32_t)0x45670123)
-#define FLASH_KEY2          ((uint32_t)0xCDEF89AB)
+#if defined(EEPROM_EMU_STM32F103xB)
+    #define FLASH_SR_WRPERR FLASH_SR_WRPRTERR
+#endif
 
 /* Delay definition */
 #define EraseTimeout        ((uint32_t)0x00000FFF)

tmk_core/common/eeconfig.c

@@ -3,7 +3,7 @@
 #include "eeprom.h"
 #include "eeconfig.h"
 
-#ifdef STM32F303xC
+#ifdef STM32_EEPROM_ENABLE
 #include "hal.h"
 #include "eeprom_stm32.h"
 #endif
@@ -32,7 +32,7 @@ void eeconfig_init_kb(void) {
  * FIXME: needs doc
  */
 void eeconfig_init_quantum(void) {
-#ifdef STM32F303xC
+#ifdef STM32_EEPROM_ENABLE
     EEPROM_format();
 #endif
   eeprom_update_word(EECONFIG_MAGIC,          EECONFIG_MAGIC_NUMBER);
@@ -73,7 +73,7 @@ void eeconfig_enable(void)
  */
 void eeconfig_disable(void)
 {
-#ifdef STM32F303xC
+#ifdef STM32_EEPROM_ENABLE
     EEPROM_format();
 #endif
     eeprom_update_word(EECONFIG_MAGIC, EECONFIG_MAGIC_NUMBER_OFF);

tmk_core/common/eeconfig.h

@@ -26,7 +26,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define EECONFIG_MAGIC_NUMBER_OFF                   (uint16_t)0xFFFF
 
 /* eeprom parameteter address */
-#if !defined(STM32F303xC)
+#if !defined(STM32_EEPROM_ENABLE)
 #define EECONFIG_MAGIC                              (uint16_t *)0
 #define EECONFIG_DEBUG                               (uint8_t *)2
 #define EECONFIG_DEFAULT_LAYER                       (uint8_t *)3

tmk_core/protocol/chibios/main.c

@@ -44,7 +44,7 @@
 #ifdef MIDI_ENABLE
 #include "qmk_midi.h"
 #endif
-#ifdef STM32F303xC
+#ifdef STM32_EEPROM_ENABLE
 #include "eeprom_stm32.h"
 #endif
 #include "suspend.h"
@@ -112,7 +112,7 @@ int main(void) {
   halInit();
   chSysInit();
 
-#ifdef STM32F303xC
+#ifdef STM32_EEPROM_ENABLE
   EEPROM_init();
 #endif