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Diffstat (limited to 'platforms/chibios/flash_stm32.c')
| -rw-r--r-- | platforms/chibios/flash_stm32.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/platforms/chibios/flash_stm32.c b/platforms/chibios/flash_stm32.c new file mode 100644 index 0000000000..72c41b8b78 --- /dev/null +++ b/platforms/chibios/flash_stm32.c @@ -0,0 +1,208 @@ +/* + * 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 <hal.h> +#include "flash_stm32.h" + +#if defined(STM32F1XX) +# define FLASH_SR_WRPERR FLASH_SR_WRPRTERR +#endif + +#if defined(MCU_GD32V) +/* GigaDevice GD32VF103 is a STM32F103 clone at heart. */ +# include "gd32v_compatibility.h" +#endif + +#if defined(STM32F4XX) +# define FLASH_SR_PGERR (FLASH_SR_PGSERR | FLASH_SR_PGPERR | FLASH_SR_PGAERR) + +# define FLASH_KEY1 0x45670123U +# define FLASH_KEY2 0xCDEF89ABU + +static uint8_t ADDR2PAGE(uint32_t Page_Address) { + switch (Page_Address) { + case 0x08000000 ... 0x08003FFF: + return 0; + case 0x08004000 ... 0x08007FFF: + return 1; + case 0x08008000 ... 0x0800BFFF: + return 2; + case 0x0800C000 ... 0x0800FFFF: + return 3; + } + + // TODO: bad times... + return 7; +} +#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 defined(FLASH_OBR_OPTERR) + if ((FLASH->SR & FLASH_OBR_OPTERR) != 0) return FLASH_ERROR_OPT; +#endif + + 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 */ +#if defined(FLASH_CR_SNB) + FLASH->CR &= ~FLASH_CR_SNB; + FLASH->CR |= FLASH_CR_SER | (ADDR2PAGE(Page_Address) << FLASH_CR_SNB_Pos); +#else + FLASH->CR |= FLASH_CR_PER; + FLASH->AR = Page_Address; +#endif + 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 configured Bits */ +#if defined(FLASH_CR_SNB) + FLASH->CR &= ~(FLASH_CR_SER | FLASH_CR_SNB); +#else + FLASH->CR &= ~FLASH_CR_PER; +#endif + } + 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 */ + +#if defined(FLASH_CR_PSIZE) + FLASH->CR &= ~FLASH_CR_PSIZE; + FLASH->CR |= FLASH_CR_PSIZE_0; +#endif + 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) { + if (FLASH->CR & FLASH_CR_LOCK) { + /* 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; +} |