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Diffstat (limited to 'Marlin/src/HAL/STM32/eeprom_flash.cpp')
| -rw-r--r-- | Marlin/src/HAL/STM32/eeprom_flash.cpp | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32/eeprom_flash.cpp b/Marlin/src/HAL/STM32/eeprom_flash.cpp new file mode 100644 index 0000000..633a286 --- /dev/null +++ b/Marlin/src/HAL/STM32/eeprom_flash.cpp @@ -0,0 +1,269 @@ +/** + * Marlin 3D Printer Firmware + * + * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin] + * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com + * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com + * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + * + */ +#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC) + +#include "../../inc/MarlinConfig.h" + +#if ENABLED(FLASH_EEPROM_EMULATION) + +#include "../shared/eeprom_api.h" + +/** + * The STM32 HAL supports chips that deal with "pages" and some with "sectors" and some that + * even have multiple "banks" of flash. + * + * This code is a bit of a mashup of + * framework-arduinoststm32/cores/arduino/stm32/stm32_eeprom.c + * hal/hal_lpc1768/persistent_store_flash.cpp + * + * This has only be written against those that use a single "sector" design. + * + * Those that deal with "pages" could be made to work. Looking at the STM32F07 for example, there are + * 128 "pages", each 2kB in size. If we continued with our EEPROM being 4Kb, we'd always need to operate + * on 2 of these pages. Each write, we'd use 2 different pages from a pool of pages until we are done. + */ + +#if ENABLED(FLASH_EEPROM_LEVELING) + + #include "stm32_def.h" + + #define DEBUG_OUT ENABLED(EEPROM_CHITCHAT) + #include "src/core/debug_out.h" + + #ifndef MARLIN_EEPROM_SIZE + #define MARLIN_EEPROM_SIZE 0x1000 // 4KB + #endif + + #ifndef FLASH_SECTOR + #define FLASH_SECTOR (FLASH_SECTOR_TOTAL - 1) + #endif + #ifndef FLASH_UNIT_SIZE + #define FLASH_UNIT_SIZE 0x20000 // 128kB + #endif + + #ifndef FLASH_ADDRESS_START + #define FLASH_ADDRESS_START (FLASH_END - ((FLASH_SECTOR_TOTAL - (FLASH_SECTOR)) * (FLASH_UNIT_SIZE)) + 1) + #endif + #define FLASH_ADDRESS_END (FLASH_ADDRESS_START + FLASH_UNIT_SIZE - 1) + + #define EEPROM_SLOTS ((FLASH_UNIT_SIZE) / (MARLIN_EEPROM_SIZE)) + #define SLOT_ADDRESS(slot) (FLASH_ADDRESS_START + (slot * (MARLIN_EEPROM_SIZE))) + + #define UNLOCK_FLASH() if (!flash_unlocked) { \ + HAL_FLASH_Unlock(); \ + __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | \ + FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR); \ + flash_unlocked = true; \ + } + #define LOCK_FLASH() if (flash_unlocked) { HAL_FLASH_Lock(); flash_unlocked = false; } + + #define EMPTY_UINT32 ((uint32_t)-1) + #define EMPTY_UINT8 ((uint8_t)-1) + + static uint8_t ram_eeprom[MARLIN_EEPROM_SIZE] __attribute__((aligned(4))) = {0}; + static int current_slot = -1; + + static_assert(0 == MARLIN_EEPROM_SIZE % 4, "MARLIN_EEPROM_SIZE must be a multiple of 4"); // Ensure copying as uint32_t is safe + static_assert(0 == FLASH_UNIT_SIZE % MARLIN_EEPROM_SIZE, "MARLIN_EEPROM_SIZE must divide evenly into your FLASH_UNIT_SIZE"); + static_assert(FLASH_UNIT_SIZE >= MARLIN_EEPROM_SIZE, "FLASH_UNIT_SIZE must be greater than or equal to your MARLIN_EEPROM_SIZE"); + static_assert(IS_FLASH_SECTOR(FLASH_SECTOR), "FLASH_SECTOR is invalid"); + static_assert(IS_POWER_OF_2(FLASH_UNIT_SIZE), "FLASH_UNIT_SIZE should be a power of 2, please check your chip's spec sheet"); + +#endif + +static bool eeprom_data_written = false; + +#ifndef MARLIN_EEPROM_SIZE + #define MARLIN_EEPROM_SIZE size_t(E2END + 1) +#endif +size_t PersistentStore::capacity() { return MARLIN_EEPROM_SIZE; } + +bool PersistentStore::access_start() { + + #if ENABLED(FLASH_EEPROM_LEVELING) + + if (current_slot == -1 || eeprom_data_written) { + // This must be the first time since power on that we have accessed the storage, or someone + // loaded and called write_data and never called access_finish. + // Lets go looking for the slot that holds our configuration. + if (eeprom_data_written) DEBUG_ECHOLNPGM("Dangling EEPROM write_data"); + uint32_t address = FLASH_ADDRESS_START; + while (address <= FLASH_ADDRESS_END) { + uint32_t address_value = (*(__IO uint32_t*)address); + if (address_value != EMPTY_UINT32) { + current_slot = (address - (FLASH_ADDRESS_START)) / (MARLIN_EEPROM_SIZE); + break; + } + address += sizeof(uint32_t); + } + if (current_slot == -1) { + // We didn't find anything, so we'll just intialize to empty + for (int i = 0; i < MARLIN_EEPROM_SIZE; i++) ram_eeprom[i] = EMPTY_UINT8; + current_slot = EEPROM_SLOTS; + } + else { + // load current settings + uint8_t *eeprom_data = (uint8_t *)SLOT_ADDRESS(current_slot); + for (int i = 0; i < MARLIN_EEPROM_SIZE; i++) ram_eeprom[i] = eeprom_data[i]; + DEBUG_ECHOLNPAIR("EEPROM loaded from slot ", current_slot, "."); + } + eeprom_data_written = false; + } + + #else + eeprom_buffer_fill(); + #endif + + return true; +} + +bool PersistentStore::access_finish() { + + if (eeprom_data_written) { + #ifdef STM32F4xx + // MCU may come up with flash error bits which prevent some flash operations. + // Clear flags prior to flash operations to prevent errors. + __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR); + #endif + + #if ENABLED(FLASH_EEPROM_LEVELING) + + HAL_StatusTypeDef status = HAL_ERROR; + bool flash_unlocked = false; + + if (--current_slot < 0) { + // all slots have been used, erase everything and start again + + FLASH_EraseInitTypeDef EraseInitStruct; + uint32_t SectorError = 0; + + EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS; + EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3; + EraseInitStruct.Sector = FLASH_SECTOR; + EraseInitStruct.NbSectors = 1; + + current_slot = EEPROM_SLOTS - 1; + UNLOCK_FLASH(); + + TERN_(HAS_PAUSE_SERVO_OUTPUT, PAUSE_SERVO_OUTPUT()); + DISABLE_ISRS(); + status = HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError); + ENABLE_ISRS(); + TERN_(HAS_PAUSE_SERVO_OUTPUT, RESUME_SERVO_OUTPUT()); + if (status != HAL_OK) { + DEBUG_ECHOLNPAIR("HAL_FLASHEx_Erase=", status); + DEBUG_ECHOLNPAIR("GetError=", HAL_FLASH_GetError()); + DEBUG_ECHOLNPAIR("SectorError=", SectorError); + LOCK_FLASH(); + return false; + } + } + + UNLOCK_FLASH(); + + uint32_t offset = 0; + uint32_t address = SLOT_ADDRESS(current_slot); + uint32_t address_end = address + MARLIN_EEPROM_SIZE; + uint32_t data = 0; + + bool success = true; + + while (address < address_end) { + memcpy(&data, ram_eeprom + offset, sizeof(uint32_t)); + status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data); + if (status == HAL_OK) { + address += sizeof(uint32_t); + offset += sizeof(uint32_t); + } + else { + DEBUG_ECHOLNPAIR("HAL_FLASH_Program=", status); + DEBUG_ECHOLNPAIR("GetError=", HAL_FLASH_GetError()); + DEBUG_ECHOLNPAIR("address=", address); + success = false; + break; + } + } + + LOCK_FLASH(); + + if (success) { + eeprom_data_written = false; + DEBUG_ECHOLNPAIR("EEPROM saved to slot ", current_slot, "."); + } + + return success; + + #else + // The following was written for the STM32F4 but may work with other MCUs as well. + // Most STM32F4 flash does not allow reading from flash during erase operations. + // This takes about a second on a STM32F407 with a 128kB sector used as EEPROM. + // Interrupts during this time can have unpredictable results, such as killing Servo + // output. Servo output still glitches with interrupts disabled, but recovers after the + // erase. + TERN_(HAS_PAUSE_SERVO_OUTPUT, PAUSE_SERVO_OUTPUT()); + DISABLE_ISRS(); + eeprom_buffer_flush(); + ENABLE_ISRS(); + TERN_(HAS_PAUSE_SERVO_OUTPUT, RESUME_SERVO_OUTPUT()); + + eeprom_data_written = false; + #endif + } + + return true; +} + +bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) { + while (size--) { + uint8_t v = *value; + #if ENABLED(FLASH_EEPROM_LEVELING) + if (v != ram_eeprom[pos]) { + ram_eeprom[pos] = v; + eeprom_data_written = true; + } + #else + if (v != eeprom_buffered_read_byte(pos)) { + eeprom_buffered_write_byte(pos, v); + eeprom_data_written = true; + } + #endif + crc16(crc, &v, 1); + pos++; + value++; + } + return false; +} + +bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) { + do { + const uint8_t c = TERN(FLASH_EEPROM_LEVELING, ram_eeprom[pos], eeprom_buffered_read_byte(pos)); + if (writing) *value = c; + crc16(crc, &c, 1); + pos++; + value++; + } while (--size); + return false; +} + +#endif // FLASH_EEPROM_EMULATION +#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC |