From 621ce29a53e9e94e085fbd86c0b7134e9df4bfe5 Mon Sep 17 00:00:00 2001 From: yiancar Date: Wed, 29 Aug 2018 23:14:49 +0300 Subject: STM32 EEPROM Emulation (#3741) * STM32 EEPROM Emulation - Added EEPROM emulation libaries from libmaple and Arduino_STM32. https://github.com/rogerclarkmelbourne/Arduino_STM32 and https://github.com/leaflabs/libmaple. - Renamed teensy EEPROM library and added conditional selection of library. - Remapped EEPROM memory map for 16 byte blocks (as is with STM32f3xx MCUs). - Added EEPROM initialization in main.c of Chibios. - Added EEPROM format to clear the emulated pages when EEPROM is marked as invalid. * Fixed ifdef --- tmk_core/common/chibios/flash_stm32.c | 180 ++++++++++++++++++++++++++++++++++ 1 file changed, 180 insertions(+) create mode 100755 tmk_core/common/chibios/flash_stm32.c (limited to 'tmk_core/common/chibios/flash_stm32.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..e7199ac7b1 --- /dev/null +++ b/tmk_core/common/chibios/flash_stm32.c @@ -0,0 +1,180 @@ +/* + * 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 + */ + +#define STM32F303xC + +#include "stm32f3xx.h" +#include "flash_stm32.h" + +#define FLASH_KEY1 ((uint32_t)0x45670123) +#define FLASH_KEY2 ((uint32_t)0xCDEF89AB) + +/* 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; +} -- cgit v1.2.3