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-rwxr-xr-xtmk_core/common/chibios/eeprom_stm32.c673
-rwxr-xr-xtmk_core/common/chibios/eeprom_stm32.h95
-rw-r--r--tmk_core/common/chibios/eeprom_teensy.c (renamed from tmk_core/common/chibios/eeprom.c)0
-rwxr-xr-xtmk_core/common/chibios/flash_stm32.c188
-rwxr-xr-xtmk_core/common/chibios/flash_stm32.h53
5 files changed, 1009 insertions, 0 deletions
diff --git a/tmk_core/common/chibios/eeprom_stm32.c b/tmk_core/common/chibios/eeprom_stm32.c
new file mode 100755
index 0000000000..a869985501
--- /dev/null
+++ b/tmk_core/common/chibios/eeprom_stm32.c
@@ -0,0 +1,673 @@
+/*
+ * This software is experimental and a work in progress.
+ * Under no circumstances should these files be used in relation to any critical system(s).
+ * Use of these files is at your own risk.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * This files are free to use from https://github.com/rogerclarkmelbourne/Arduino_STM32 and
+ * https://github.com/leaflabs/libmaple
+ *
+ * Modifications for QMK and STM32F303 by Yiancar
+ */
+
+#include "eeprom_stm32.h"
+
+ FLASH_Status EE_ErasePage(uint32_t);
+
+ uint16_t EE_CheckPage(uint32_t, uint16_t);
+ uint16_t EE_CheckErasePage(uint32_t, uint16_t);
+ uint16_t EE_Format(void);
+ uint32_t EE_FindValidPage(void);
+ uint16_t EE_GetVariablesCount(uint32_t, uint16_t);
+ uint16_t EE_PageTransfer(uint32_t, uint32_t, uint16_t);
+ uint16_t EE_VerifyPageFullWriteVariable(uint16_t, uint16_t);
+
+ uint32_t PageBase0 = EEPROM_PAGE0_BASE;
+ uint32_t PageBase1 = EEPROM_PAGE1_BASE;
+ uint32_t PageSize = EEPROM_PAGE_SIZE;
+ uint16_t Status = EEPROM_NOT_INIT;
+
+// See http://www.st.com/web/en/resource/technical/document/application_note/CD00165693.pdf
+
+/**
+ * @brief Check page for blank
+ * @param page base address
+ * @retval Success or error
+ * EEPROM_BAD_FLASH: page not empty after erase
+ * EEPROM_OK: page blank
+ */
+uint16_t EE_CheckPage(uint32_t pageBase, uint16_t status)
+{
+ uint32_t pageEnd = pageBase + (uint32_t)PageSize;
+
+ // Page Status not EEPROM_ERASED and not a "state"
+ if ((*(__IO uint16_t*)pageBase) != EEPROM_ERASED && (*(__IO uint16_t*)pageBase) != status)
+ return EEPROM_BAD_FLASH;
+ for(pageBase += 4; pageBase < pageEnd; pageBase += 4)
+ if ((*(__IO uint32_t*)pageBase) != 0xFFFFFFFF) // Verify if slot is empty
+ return EEPROM_BAD_FLASH;
+ return EEPROM_OK;
+}
+
+/**
+ * @brief Erase page with increment erase counter (page + 2)
+ * @param page base address
+ * @retval Success or error
+ * FLASH_COMPLETE: success erase
+ * - Flash error code: on write Flash error
+ */
+FLASH_Status EE_ErasePage(uint32_t pageBase)
+{
+ FLASH_Status FlashStatus;
+ uint16_t data = (*(__IO uint16_t*)(pageBase));
+ if ((data == EEPROM_ERASED) || (data == EEPROM_VALID_PAGE) || (data == EEPROM_RECEIVE_DATA))
+ data = (*(__IO uint16_t*)(pageBase + 2)) + 1;
+ else
+ data = 0;
+
+ FlashStatus = FLASH_ErasePage(pageBase);
+ if (FlashStatus == FLASH_COMPLETE)
+ FlashStatus = FLASH_ProgramHalfWord(pageBase + 2, data);
+
+ return FlashStatus;
+}
+
+/**
+ * @brief Check page for blank and erase it
+ * @param page base address
+ * @retval Success or error
+ * - Flash error code: on write Flash error
+ * - EEPROM_BAD_FLASH: page not empty after erase
+ * - EEPROM_OK: page blank
+ */
+uint16_t EE_CheckErasePage(uint32_t pageBase, uint16_t status)
+{
+ uint16_t FlashStatus;
+ if (EE_CheckPage(pageBase, status) != EEPROM_OK)
+ {
+ FlashStatus = EE_ErasePage(pageBase);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+ return EE_CheckPage(pageBase, status);
+ }
+ return EEPROM_OK;
+}
+
+/**
+ * @brief Find valid Page for write or read operation
+ * @param Page0: Page0 base address
+ * Page1: Page1 base address
+ * @retval Valid page address (PAGE0 or PAGE1) or NULL in case of no valid page was found
+ */
+uint32_t EE_FindValidPage(void)
+{
+ uint16_t status0 = (*(__IO uint16_t*)PageBase0); // Get Page0 actual status
+ uint16_t status1 = (*(__IO uint16_t*)PageBase1); // Get Page1 actual status
+
+ if (status0 == EEPROM_VALID_PAGE && status1 == EEPROM_ERASED)
+ return PageBase0;
+ if (status1 == EEPROM_VALID_PAGE && status0 == EEPROM_ERASED)
+ return PageBase1;
+
+ return 0;
+}
+
+/**
+ * @brief Calculate unique variables in EEPROM
+ * @param start: address of first slot to check (page + 4)
+ * @param end: page end address
+ * @param address: 16 bit virtual address of the variable to excluse (or 0XFFFF)
+ * @retval count of variables
+ */
+uint16_t EE_GetVariablesCount(uint32_t pageBase, uint16_t skipAddress)
+{
+ uint16_t varAddress, nextAddress;
+ uint32_t idx;
+ uint32_t pageEnd = pageBase + (uint32_t)PageSize;
+ uint16_t count = 0;
+
+ for (pageBase += 6; pageBase < pageEnd; pageBase += 4)
+ {
+ varAddress = (*(__IO uint16_t*)pageBase);
+ if (varAddress == 0xFFFF || varAddress == skipAddress)
+ continue;
+
+ count++;
+ for(idx = pageBase + 4; idx < pageEnd; idx += 4)
+ {
+ nextAddress = (*(__IO uint16_t*)idx);
+ if (nextAddress == varAddress)
+ {
+ count--;
+ break;
+ }
+ }
+ }
+ return count;
+}
+
+/**
+ * @brief Transfers last updated variables data from the full Page to an empty one.
+ * @param newPage: new page base address
+ * @param oldPage: old page base address
+ * @param SkipAddress: 16 bit virtual address of the variable (or 0xFFFF)
+ * @retval Success or error status:
+ * - FLASH_COMPLETE: on success
+ * - EEPROM_OUT_SIZE: if valid new page is full
+ * - Flash error code: on write Flash error
+ */
+uint16_t EE_PageTransfer(uint32_t newPage, uint32_t oldPage, uint16_t SkipAddress)
+{
+ uint32_t oldEnd, newEnd;
+ uint32_t oldIdx, newIdx, idx;
+ uint16_t address, data, found;
+ FLASH_Status FlashStatus;
+
+ // Transfer process: transfer variables from old to the new active page
+ newEnd = newPage + ((uint32_t)PageSize);
+
+ // Find first free element in new page
+ for (newIdx = newPage + 4; newIdx < newEnd; newIdx += 4)
+ if ((*(__IO uint32_t*)newIdx) == 0xFFFFFFFF) // Verify if element
+ break; // contents are 0xFFFFFFFF
+ if (newIdx >= newEnd)
+ return EEPROM_OUT_SIZE;
+
+ oldEnd = oldPage + 4;
+ oldIdx = oldPage + (uint32_t)(PageSize - 2);
+
+ for (; oldIdx > oldEnd; oldIdx -= 4)
+ {
+ address = *(__IO uint16_t*)oldIdx;
+ if (address == 0xFFFF || address == SkipAddress)
+ continue; // it's means that power off after write data
+
+ found = 0;
+ for (idx = newPage + 6; idx < newIdx; idx += 4)
+ if ((*(__IO uint16_t*)(idx)) == address)
+ {
+ found = 1;
+ break;
+ }
+
+ if (found)
+ continue;
+
+ if (newIdx < newEnd)
+ {
+ data = (*(__IO uint16_t*)(oldIdx - 2));
+
+ FlashStatus = FLASH_ProgramHalfWord(newIdx, data);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+
+ FlashStatus = FLASH_ProgramHalfWord(newIdx + 2, address);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+
+ newIdx += 4;
+ }
+ else
+ return EEPROM_OUT_SIZE;
+ }
+
+ // Erase the old Page: Set old Page status to EEPROM_EEPROM_ERASED status
+ data = EE_CheckErasePage(oldPage, EEPROM_ERASED);
+ if (data != EEPROM_OK)
+ return data;
+
+ // Set new Page status
+ FlashStatus = FLASH_ProgramHalfWord(newPage, EEPROM_VALID_PAGE);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+
+ return EEPROM_OK;
+}
+
+/**
+ * @brief Verify if active page is full and Writes variable in EEPROM.
+ * @param Address: 16 bit virtual address of the variable
+ * @param Data: 16 bit data to be written as variable value
+ * @retval Success or error status:
+ * - FLASH_COMPLETE: on success
+ * - EEPROM_PAGE_FULL: if valid page is full (need page transfer)
+ * - EEPROM_NO_VALID_PAGE: if no valid page was found
+ * - EEPROM_OUT_SIZE: if EEPROM size exceeded
+ * - Flash error code: on write Flash error
+ */
+uint16_t EE_VerifyPageFullWriteVariable(uint16_t Address, uint16_t Data)
+{
+ FLASH_Status FlashStatus;
+ uint32_t idx, pageBase, pageEnd, newPage;
+ uint16_t count;
+
+ // Get valid Page for write operation
+ pageBase = EE_FindValidPage();
+ if (pageBase == 0)
+ return EEPROM_NO_VALID_PAGE;
+
+ // Get the valid Page end Address
+ pageEnd = pageBase + PageSize; // Set end of page
+
+ for (idx = pageEnd - 2; idx > pageBase; idx -= 4)
+ {
+ if ((*(__IO uint16_t*)idx) == Address) // Find last value for address
+ {
+ count = (*(__IO uint16_t*)(idx - 2)); // Read last data
+ if (count == Data)
+ return EEPROM_OK;
+ if (count == 0xFFFF)
+ {
+ FlashStatus = FLASH_ProgramHalfWord(idx - 2, Data); // Set variable data
+ if (FlashStatus == FLASH_COMPLETE)
+ return EEPROM_OK;
+ }
+ break;
+ }
+ }
+
+ // Check each active page address starting from begining
+ for (idx = pageBase + 4; idx < pageEnd; idx += 4)
+ if ((*(__IO uint32_t*)idx) == 0xFFFFFFFF) // Verify if element
+ { // contents are 0xFFFFFFFF
+ FlashStatus = FLASH_ProgramHalfWord(idx, Data); // Set variable data
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+ FlashStatus = FLASH_ProgramHalfWord(idx + 2, Address); // Set variable virtual address
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+ return EEPROM_OK;
+ }
+
+ // Empty slot not found, need page transfer
+ // Calculate unique variables in page
+ count = EE_GetVariablesCount(pageBase, Address) + 1;
+ if (count >= (PageSize / 4 - 1))
+ return EEPROM_OUT_SIZE;
+
+ if (pageBase == PageBase1)
+ newPage = PageBase0; // New page address where variable will be moved to
+ else
+ newPage = PageBase1;
+
+ // Set the new Page status to RECEIVE_DATA status
+ FlashStatus = FLASH_ProgramHalfWord(newPage, EEPROM_RECEIVE_DATA);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+
+ // Write the variable passed as parameter in the new active page
+ FlashStatus = FLASH_ProgramHalfWord(newPage + 4, Data);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+
+ FlashStatus = FLASH_ProgramHalfWord(newPage + 6, Address);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+
+ return EE_PageTransfer(newPage, pageBase, Address);
+}
+
+/*EEPROMClass::EEPROMClass(void)
+{
+ PageBase0 = EEPROM_PAGE0_BASE;
+ PageBase1 = EEPROM_PAGE1_BASE;
+ PageSize = EEPROM_PAGE_SIZE;
+ Status = EEPROM_NOT_INIT;
+}*/
+/*
+uint16_t EEPROM_init(uint32_t pageBase0, uint32_t pageBase1, uint32_t pageSize)
+{
+ PageBase0 = pageBase0;
+ PageBase1 = pageBase1;
+ PageSize = pageSize;
+ return EEPROM_init();
+}*/
+
+uint16_t EEPROM_init(void)
+{
+ uint16_t status0 = 6, status1 = 6;
+ FLASH_Status FlashStatus;
+
+ FLASH_Unlock();
+ Status = EEPROM_NO_VALID_PAGE;
+
+ status0 = (*(__IO uint16_t *)PageBase0);
+ status1 = (*(__IO uint16_t *)PageBase1);
+
+ switch (status0)
+ {
+/*
+ Page0 Page1
+ ----- -----
+ EEPROM_ERASED EEPROM_VALID_PAGE Page1 valid, Page0 erased
+ EEPROM_RECEIVE_DATA Page1 need set to valid, Page0 erased
+ EEPROM_ERASED make EE_Format
+ any Error: EEPROM_NO_VALID_PAGE
+*/
+ case EEPROM_ERASED:
+ if (status1 == EEPROM_VALID_PAGE) // Page0 erased, Page1 valid
+ Status = EE_CheckErasePage(PageBase0, EEPROM_ERASED);
+ else if (status1 == EEPROM_RECEIVE_DATA) // Page0 erased, Page1 receive
+ {
+ FlashStatus = FLASH_ProgramHalfWord(PageBase1, EEPROM_VALID_PAGE);
+ if (FlashStatus != FLASH_COMPLETE)
+ Status = FlashStatus;
+ else
+ Status = EE_CheckErasePage(PageBase0, EEPROM_ERASED);
+ }
+ else if (status1 == EEPROM_ERASED) // Both in erased state so format EEPROM
+ Status = EEPROM_format();
+ break;
+/*
+ Page0 Page1
+ ----- -----
+ EEPROM_RECEIVE_DATA EEPROM_VALID_PAGE Transfer Page1 to Page0
+ EEPROM_ERASED Page0 need set to valid, Page1 erased
+ any EEPROM_NO_VALID_PAGE
+*/
+ case EEPROM_RECEIVE_DATA:
+ if (status1 == EEPROM_VALID_PAGE) // Page0 receive, Page1 valid
+ Status = EE_PageTransfer(PageBase0, PageBase1, 0xFFFF);
+ else if (status1 == EEPROM_ERASED) // Page0 receive, Page1 erased
+ {
+ Status = EE_CheckErasePage(PageBase1, EEPROM_ERASED);
+ if (Status == EEPROM_OK)
+ {
+ FlashStatus = FLASH_ProgramHalfWord(PageBase0, EEPROM_VALID_PAGE);
+ if (FlashStatus != FLASH_COMPLETE)
+ Status = FlashStatus;
+ else
+ Status = EEPROM_OK;
+ }
+ }
+ break;
+/*
+ Page0 Page1
+ ----- -----
+ EEPROM_VALID_PAGE EEPROM_VALID_PAGE Error: EEPROM_NO_VALID_PAGE
+ EEPROM_RECEIVE_DATA Transfer Page0 to Page1
+ any Page0 valid, Page1 erased
+*/
+ case EEPROM_VALID_PAGE:
+ if (status1 == EEPROM_VALID_PAGE) // Both pages valid
+ Status = EEPROM_NO_VALID_PAGE;
+ else if (status1 == EEPROM_RECEIVE_DATA)
+ Status = EE_PageTransfer(PageBase1, PageBase0, 0xFFFF);
+ else
+ Status = EE_CheckErasePage(PageBase1, EEPROM_ERASED);
+ break;
+/*
+ Page0 Page1
+ ----- -----
+ any EEPROM_VALID_PAGE Page1 valid, Page0 erased
+ EEPROM_RECEIVE_DATA Page1 valid, Page0 erased
+ any EEPROM_NO_VALID_PAGE
+*/
+ default:
+ if (status1 == EEPROM_VALID_PAGE)
+ Status = EE_CheckErasePage(PageBase0, EEPROM_ERASED); // Check/Erase Page0
+ else if (status1 == EEPROM_RECEIVE_DATA)
+ {
+ FlashStatus = FLASH_ProgramHalfWord(PageBase1, EEPROM_VALID_PAGE);
+ if (FlashStatus != FLASH_COMPLETE)
+ Status = FlashStatus;
+ else
+ Status = EE_CheckErasePage(PageBase0, EEPROM_ERASED);
+ }
+ break;
+ }
+ return Status;
+}
+
+/**
+ * @brief Erases PAGE0 and PAGE1 and writes EEPROM_VALID_PAGE / 0 header to PAGE0
+ * @param PAGE0 and PAGE1 base addresses
+ * @retval Status of the last operation (Flash write or erase) done during EEPROM formating
+ */
+uint16_t EEPROM_format(void)
+{
+ uint16_t status;
+ FLASH_Status FlashStatus;
+
+ FLASH_Unlock();
+
+ // Erase Page0
+ status = EE_CheckErasePage(PageBase0, EEPROM_VALID_PAGE);
+ if (status != EEPROM_OK)
+ return status;
+ if ((*(__IO uint16_t*)PageBase0) == EEPROM_ERASED)
+ {
+ // Set Page0 as valid page: Write VALID_PAGE at Page0 base address
+ FlashStatus = FLASH_ProgramHalfWord(PageBase0, EEPROM_VALID_PAGE);
+ if (FlashStatus != FLASH_COMPLETE)
+ return FlashStatus;
+ }
+ // Erase Page1
+ return EE_CheckErasePage(PageBase1, EEPROM_ERASED);
+}
+
+/**
+ * @brief Returns the erase counter for current page
+ * @param Data: Global variable contains the read variable value
+ * @retval Success or error status:
+ * - EEPROM_OK: if erases counter return.
+ * - EEPROM_NO_VALID_PAGE: if no valid page was found.
+ */
+uint16_t EEPROM_erases(uint16_t *Erases)
+{
+ uint32_t pageBase;
+ if (Status != EEPROM_OK)
+ if (EEPROM_init() != EEPROM_OK)
+ return Status;
+
+ // Get active Page for read operation
+ pageBase = EE_FindValidPage();
+ if (pageBase == 0)
+ return EEPROM_NO_VALID_PAGE;
+
+ *Erases = (*(__IO uint16_t*)pageBase+2);
+ return EEPROM_OK;
+}
+
+/**
+ * @brief Returns the last stored variable data, if found,
+ * which correspond to the passed virtual address
+ * @param Address: Variable virtual address
+ * @retval Data for variable or EEPROM_DEFAULT_DATA, if any errors
+ */
+/*
+uint16_t EEPROM_read (uint16_t Address)
+{
+ uint16_t data;
+ EEPROM_read(Address, &data);
+ return data;
+}*/
+
+/**
+ * @brief Returns the last stored variable data, if found,
+ * which correspond to the passed virtual address
+ * @param Address: Variable virtual address
+ * @param Data: Pointer to data variable
+ * @retval Success or error status:
+ * - EEPROM_OK: if variable was found
+ * - EEPROM_BAD_ADDRESS: if the variable was not found
+ * - EEPROM_NO_VALID_PAGE: if no valid page was found.
+ */
+uint16_t EEPROM_read(uint16_t Address, uint16_t *Data)
+{
+ uint32_t pageBase, pageEnd;
+
+ // Set default data (empty EEPROM)
+ *Data = EEPROM_DEFAULT_DATA;
+
+ if (Status == EEPROM_NOT_INIT)
+ if (EEPROM_init() != EEPROM_OK)
+ return Status;
+
+ // Get active Page for read operation
+ pageBase = EE_FindValidPage();
+ if (pageBase == 0)
+ return EEPROM_NO_VALID_PAGE;
+
+ // Get the valid Page end Address
+ pageEnd = pageBase + ((uint32_t)(PageSize - 2));
+
+ // Check each active page address starting from end
+ for (pageBase += 6; pageEnd >= pageBase; pageEnd -= 4)
+ if ((*(__IO uint16_t*)pageEnd) == Address) // Compare the read address with the virtual address
+ {
+ *Data = (*(__IO uint16_t*)(pageEnd - 2)); // Get content of Address-2 which is variable value
+ return EEPROM_OK;
+ }
+
+ // Return ReadStatus value: (0: variable exist, 1: variable doesn't exist)
+ return EEPROM_BAD_ADDRESS;
+}
+
+/**
+ * @brief Writes/upadtes variable data in EEPROM.
+ * @param VirtAddress: Variable virtual address
+ * @param Data: 16 bit data to be written
+ * @retval Success or error status:
+ * - FLASH_COMPLETE: on success
+ * - EEPROM_BAD_ADDRESS: if address = 0xFFFF
+ * - EEPROM_PAGE_FULL: if valid page is full
+ * - EEPROM_NO_VALID_PAGE: if no valid page was found
+ * - EEPROM_OUT_SIZE: if no empty EEPROM variables
+ * - Flash error code: on write Flash error
+ */
+uint16_t EEPROM_write(uint16_t Address, uint16_t Data)
+{
+ if (Status == EEPROM_NOT_INIT)
+ if (EEPROM_init() != EEPROM_OK)
+ return Status;
+
+ if (Address == 0xFFFF)
+ return EEPROM_BAD_ADDRESS;
+
+ // Write the variable virtual address and value in the EEPROM
+ uint16_t status = EE_VerifyPageFullWriteVariable(Address, Data);
+ return status;
+}
+
+/**
+ * @brief Writes/upadtes variable data in EEPROM.
+ The value is written only if differs from the one already saved at the same address.
+ * @param VirtAddress: Variable virtual address
+ * @param Data: 16 bit data to be written
+ * @retval Success or error status:
+ * - EEPROM_SAME_VALUE: If new Data matches existing EEPROM Data
+ * - FLASH_COMPLETE: on success
+ * - EEPROM_BAD_ADDRESS: if address = 0xFFFF
+ * - EEPROM_PAGE_FULL: if valid page is full
+ * - EEPROM_NO_VALID_PAGE: if no valid page was found
+ * - EEPROM_OUT_SIZE: if no empty EEPROM variables
+ * - Flash error code: on write Flash error
+ */
+uint16_t EEPROM_update(uint16_t Address, uint16_t Data)
+{
+ uint16_t temp;
+ EEPROM_read(Address, &temp);
+ if (temp == Data)
+ return EEPROM_SAME_VALUE;
+ else
+ return EEPROM_write(Address, Data);
+}
+
+/**
+ * @brief Return number of variable
+ * @retval Number of variables
+ */
+uint16_t EEPROM_count(uint16_t *Count)
+{
+ if (Status == EEPROM_NOT_INIT)
+ if (EEPROM_init() != EEPROM_OK)
+ return Status;
+
+ // Get valid Page for write operation
+ uint32_t pageBase = EE_FindValidPage();
+ if (pageBase == 0)
+ return EEPROM_NO_VALID_PAGE; // No valid page, return max. numbers
+
+ *Count = EE_GetVariablesCount(pageBase, 0xFFFF);
+ return EEPROM_OK;
+}
+
+uint16_t EEPROM_maxcount(void)
+{
+ return ((PageSize / 4)-1);
+}
+
+
+uint8_t eeprom_read_byte (const uint8_t *Address)
+{
+ const uint16_t p = (const uint32_t) Address;
+ uint16_t temp;
+ EEPROM_read(p, &temp);
+ return (uint8_t) temp;
+}
+
+void eeprom_write_byte (uint8_t *Address, uint8_t Value)
+{
+ uint16_t p = (uint32_t) Address;
+ EEPROM_write(p, (uint16_t) Value);
+}
+
+void eeprom_update_byte (uint8_t *Address, uint8_t Value)
+{
+ uint16_t p = (uint32_t) Address;
+ EEPROM_update(p, (uint16_t) Value);
+}
+
+uint16_t eeprom_read_word (const uint16_t *Address)
+{
+ const uint16_t p = (const uint32_t) Address;
+ uint16_t temp;
+ EEPROM_read(p, &temp);
+ return temp;
+}
+
+void eeprom_write_word (uint16_t *Address, uint16_t Value)
+{
+ uint16_t p = (uint32_t) Address;
+ EEPROM_write(p, Value);
+}
+
+void eeprom_update_word (uint16_t *Address, uint16_t Value)
+{
+ uint16_t p = (uint32_t) Address;
+ EEPROM_update(p, Value);
+}
+
+uint32_t eeprom_read_dword (const uint32_t *Address)
+{
+ const uint16_t p = (const uint32_t) Address;
+ uint16_t temp1, temp2;
+ EEPROM_read(p, &temp1);
+ EEPROM_read(p + 1, &temp2);
+ return temp1 | (temp2 << 16);
+}
+
+void eeprom_write_dword (uint32_t *Address, uint32_t Value)
+{
+ uint16_t temp = (uint16_t) Value;
+ uint16_t p = (uint32_t) Address;
+ EEPROM_write(p, temp);
+ temp = (uint16_t) (Value >> 16);
+ EEPROM_write(p + 1, temp);
+}
+
+void eeprom_update_dword (uint32_t *Address, uint32_t Value)
+{
+ uint16_t temp = (uint16_t) Value;
+ uint16_t p = (uint32_t) Address;
+ EEPROM_update(p, temp);
+ temp = (uint16_t) (Value >> 16);
+ EEPROM_update(p + 1, temp);
+}
diff --git a/tmk_core/common/chibios/eeprom_stm32.h b/tmk_core/common/chibios/eeprom_stm32.h
new file mode 100755
index 0000000000..09229530ca
--- /dev/null
+++ b/tmk_core/common/chibios/eeprom_stm32.h
@@ -0,0 +1,95 @@
+/*
+ * This software is experimental and a work in progress.
+ * Under no circumstances should these files be used in relation to any critical system(s).
+ * Use of these files is at your own risk.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * This files are free to use from https://github.com/rogerclarkmelbourne/Arduino_STM32 and
+ * https://github.com/leaflabs/libmaple
+ *
+ * Modifications for QMK and STM32F303 by Yiancar
+ */
+
+// This file must be modified if the MCU is not defined below.
+// This library also assumes that the pages are not used by the firmware.
+
+#ifndef __EEPROM_H
+#define __EEPROM_H
+
+#include "ch.h"
+#include "hal.h"
+#include "flash_stm32.h"
+
+// HACK ALERT. This definition may not match your processor
+// To Do. Work out correct value for EEPROM_PAGE_SIZE on the STM32F103CT6 etc
+#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)
+ #define EEPROM_PAGE_SIZE (uint16_t)0x400 /* Page size = 1KByte */
+ #elif defined (MCU_STM32F103ZE) || defined (MCU_STM32F103RE) || defined (MCU_STM32F103RD) || defined (MCU_STM32F303CC)
+ #define EEPROM_PAGE_SIZE (uint16_t)0x800 /* Page size = 2KByte */
+ #else
+ #error "No MCU type specified. Add something like -DMCU_STM32F103RB to your compiler arguments (probably in a Makefile)."
+ #endif
+#endif
+
+#ifndef EEPROM_START_ADDRESS
+ #if defined (MCU_STM32F103RB)
+ #define EEPROM_START_ADDRESS ((uint32_t)(0x8000000 + 128 * 1024 - 2 * EEPROM_PAGE_SIZE))
+ #elif defined (MCU_STM32F103ZE) || defined (MCU_STM32F103RE)
+ #define EEPROM_START_ADDRESS ((uint32_t)(0x8000000 + 512 * 1024 - 2 * EEPROM_PAGE_SIZE))
+ #elif defined (MCU_STM32F103RD)
+ #define EEPROM_START_ADDRESS ((uint32_t)(0x8000000 + 384 * 1024 - 2 * EEPROM_PAGE_SIZE))
+ #elif defined (MCU_STM32F303CC)
+ #define EEPROM_START_ADDRESS ((uint32_t)(0x8000000 + 256 * 1024 - 2 * EEPROM_PAGE_SIZE))
+ #else
+ #error "No MCU type specified. Add something like -DMCU_STM32F103RB to your compiler arguments (probably in a Makefile)."
+ #endif
+#endif
+
+/* Pages 0 and 1 base and end addresses */
+#define EEPROM_PAGE0_BASE ((uint32_t)(EEPROM_START_ADDRESS + 0x000))
+#define EEPROM_PAGE1_BASE ((uint32_t)(EEPROM_START_ADDRESS + EEPROM_PAGE_SIZE))
+
+/* Page status definitions */
+#define EEPROM_ERASED ((uint16_t)0xFFFF) /* PAGE is empty */
+#define EEPROM_RECEIVE_DATA ((uint16_t)0xEEEE) /* PAGE is marked to receive data */
+#define EEPROM_VALID_PAGE ((uint16_t)0x0000) /* PAGE containing valid data */
+
+/* Page full define */
+enum uint16_t
+ {
+ EEPROM_OK = ((uint16_t)0x0000),
+ EEPROM_OUT_SIZE = ((uint16_t)0x0081),
+ EEPROM_BAD_ADDRESS = ((uint16_t)0x0082),
+ EEPROM_BAD_FLASH = ((uint16_t)0x0083),
+ EEPROM_NOT_INIT = ((uint16_t)0x0084),
+ EEPROM_SAME_VALUE = ((uint16_t)0x0085),
+ EEPROM_NO_VALID_PAGE = ((uint16_t)0x00AB)
+ };
+
+#define EEPROM_DEFAULT_DATA 0xFFFF
+
+ uint16_t EEPROM_init(void);
+ uint16_t EEPROM_format(void);
+ uint16_t EEPROM_erases(uint16_t *);
+ uint16_t EEPROM_read (uint16_t address, uint16_t *data);
+ uint16_t EEPROM_write(uint16_t address, uint16_t data);
+ uint16_t EEPROM_update(uint16_t address, uint16_t data);
+ uint16_t EEPROM_count(uint16_t *);
+ uint16_t EEPROM_maxcount(void);
+
+#endif /* __EEPROM_H */
diff --git a/tmk_core/common/chibios/eeprom.c b/tmk_core/common/chibios/eeprom_teensy.c
index 9061b790c4..9061b790c4 100644
--- a/tmk_core/common/chibios/eeprom.c
+++ b/tmk_core/common/chibios/eeprom_teensy.c
diff --git a/tmk_core/common/chibios/flash_stm32.c b/tmk_core/common/chibios/flash_stm32.c
new file mode 100755
index 0000000000..2735934844
--- /dev/null
+++ b/tmk_core/common/chibios/flash_stm32.c
@@ -0,0 +1,188 @@
+/*
+ * This software is experimental and a work in progress.
+ * Under no circumstances should these files be used in relation to any critical system(s).
+ * Use of these files is at your own risk.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * This files are free to use from https://github.com/rogerclarkmelbourne/Arduino_STM32 and
+ * https://github.com/leaflabs/libmaple
+ *
+ * Modifications for QMK and STM32F303 by Yiancar
+ */
+
+#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 "flash_stm32.h"
+
+#if defined(EEPROM_EMU_STM32F103xB)
+ #define FLASH_SR_WRPERR FLASH_SR_WRPRTERR
+#endif
+
+/* Delay definition */
+#define EraseTimeout ((uint32_t)0x00000FFF)
+#define ProgramTimeout ((uint32_t)0x0000001F)
+
+#define ASSERT(exp) (void)((0))
+
+/**
+ * @brief Inserts a time delay.
+ * @param None
+ * @retval None
+ */
+static void delay(void)
+{
+ __IO uint32_t i = 0;
+ for(i = 0xFF; i != 0; i--) { }
+}
+
+/**
+ * @brief Returns the FLASH Status.
+ * @param None
+ * @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP or FLASH_COMPLETE
+ */
+FLASH_Status FLASH_GetStatus(void)
+{
+ if ((FLASH->SR & FLASH_SR_BSY) == FLASH_SR_BSY)
+ return FLASH_BUSY;
+
+ if ((FLASH->SR & FLASH_SR_PGERR) != 0)
+ return FLASH_ERROR_PG;
+
+ if ((FLASH->SR & FLASH_SR_WRPERR) != 0 )
+ return FLASH_ERROR_WRP;
+
+ if ((FLASH->SR & FLASH_OBR_OPTERR) != 0 )
+ return FLASH_ERROR_OPT;
+
+ return FLASH_COMPLETE;
+}
+
+/**
+ * @brief Waits for a Flash operation to complete or a TIMEOUT to occur.
+ * @param Timeout: FLASH progamming Timeout
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout)
+{
+ FLASH_Status status;
+
+ /* Check for the Flash Status */
+ status = FLASH_GetStatus();
+ /* Wait for a Flash operation to complete or a TIMEOUT to occur */
+ while ((status == FLASH_BUSY) && (Timeout != 0x00))
+ {
+ delay();
+ status = FLASH_GetStatus();
+ Timeout--;
+ }
+ if (Timeout == 0)
+ status = FLASH_TIMEOUT;
+ /* Return the operation status */
+ return status;
+}
+
+/**
+ * @brief Erases a specified FLASH page.
+ * @param Page_Address: The page address to be erased.
+ * @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ErasePage(uint32_t Page_Address)
+{
+ FLASH_Status status = FLASH_COMPLETE;
+ /* Check the parameters */
+ ASSERT(IS_FLASH_ADDRESS(Page_Address));
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(EraseTimeout);
+
+ if(status == FLASH_COMPLETE)
+ {
+ /* if the previous operation is completed, proceed to erase the page */
+ FLASH->CR |= FLASH_CR_PER;
+ FLASH->AR = Page_Address;
+ FLASH->CR |= FLASH_CR_STRT;
+
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(EraseTimeout);
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the erase operation is completed, disable the PER Bit */
+ FLASH->CR &= ~FLASH_CR_PER;
+ }
+ FLASH->SR = (FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR);
+ }
+ /* Return the Erase Status */
+ return status;
+}
+
+/**
+ * @brief Programs a half word at a specified address.
+ * @param Address: specifies the address to be programmed.
+ * @param Data: specifies the data to be programmed.
+ * @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
+ * FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
+ */
+FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data)
+{
+ FLASH_Status status = FLASH_BAD_ADDRESS;
+
+ if (IS_FLASH_ADDRESS(Address))
+ {
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(ProgramTimeout);
+ if(status == FLASH_COMPLETE)
+ {
+ /* if the previous operation is completed, proceed to program the new data */
+ FLASH->CR |= FLASH_CR_PG;
+ *(__IO uint16_t*)Address = Data;
+ /* Wait for last operation to be completed */
+ status = FLASH_WaitForLastOperation(ProgramTimeout);
+ if(status != FLASH_TIMEOUT)
+ {
+ /* if the program operation is completed, disable the PG Bit */
+ FLASH->CR &= ~FLASH_CR_PG;
+ }
+ FLASH->SR = (FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR);
+ }
+ }
+ return status;
+}
+
+/**
+ * @brief Unlocks the FLASH Program Erase Controller.
+ * @param None
+ * @retval None
+ */
+void FLASH_Unlock(void)
+{
+ /* Authorize the FPEC Access */
+ FLASH->KEYR = FLASH_KEY1;
+ FLASH->KEYR = FLASH_KEY2;
+}
+
+/**
+ * @brief Locks the FLASH Program Erase Controller.
+ * @param None
+ * @retval None
+ */
+void FLASH_Lock(void)
+{
+ /* Set the Lock Bit to lock the FPEC and the FCR */
+ FLASH->CR |= FLASH_CR_LOCK;
+}
diff --git a/tmk_core/common/chibios/flash_stm32.h b/tmk_core/common/chibios/flash_stm32.h
new file mode 100755
index 0000000000..cc065cbca2
--- /dev/null
+++ b/tmk_core/common/chibios/flash_stm32.h
@@ -0,0 +1,53 @@
+/*
+ * This software is experimental and a work in progress.
+ * Under no circumstances should these files be used in relation to any critical system(s).
+ * Use of these files is at your own risk.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * This files are free to use from https://github.com/rogerclarkmelbourne/Arduino_STM32 and
+ * https://github.com/leaflabs/libmaple
+ *
+ * Modifications for QMK and STM32F303 by Yiancar
+ */
+
+#ifndef __FLASH_STM32_H
+#define __FLASH_STM32_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "ch.h"
+#include "hal.h"
+
+typedef enum
+ {
+ FLASH_BUSY = 1,
+ FLASH_ERROR_PG,
+ FLASH_ERROR_WRP,
+ FLASH_ERROR_OPT,
+ FLASH_COMPLETE,
+ FLASH_TIMEOUT,
+ FLASH_BAD_ADDRESS
+ } FLASH_Status;
+
+#define IS_FLASH_ADDRESS(ADDRESS) (((ADDRESS) >= 0x08000000) && ((ADDRESS) < 0x0807FFFF))
+
+FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout);
+FLASH_Status FLASH_ErasePage(uint32_t Page_Address);
+FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data);
+
+void FLASH_Unlock(void);
+void FLASH_Lock(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __FLASH_STM32_H */