diff options
Diffstat (limited to 'drivers/eeprom')
-rw-r--r-- | drivers/eeprom/eeprom_stm32_L0_L1.c | 96 | ||||
-rw-r--r-- | drivers/eeprom/eeprom_stm32_L0_L1.h | 33 |
2 files changed, 0 insertions, 129 deletions
diff --git a/drivers/eeprom/eeprom_stm32_L0_L1.c b/drivers/eeprom/eeprom_stm32_L0_L1.c deleted file mode 100644 index ed26cc7145..0000000000 --- a/drivers/eeprom/eeprom_stm32_L0_L1.c +++ /dev/null @@ -1,96 +0,0 @@ -/* Copyright 2020 Nick Brassel (tzarc) - * - * 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 2 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 <http://www.gnu.org/licenses/>. - */ - -#include <stdint.h> -#include <string.h> - -#include <hal.h> -#include "eeprom_driver.h" -#include "eeprom_stm32_L0_L1.h" - -#define EEPROM_BASE_ADDR 0x08080000 -#define EEPROM_ADDR(offset) (EEPROM_BASE_ADDR + (offset)) -#define EEPROM_PTR(offset) ((__IO uint8_t *)EEPROM_ADDR(offset)) -#define EEPROM_BYTE(location, offset) (*(EEPROM_PTR(((uint32_t)location) + ((uint32_t)offset)))) - -#define BUFFER_BYTE(buffer, offset) (*(((uint8_t *)buffer) + offset)) - -#define FLASH_PEKEY1 0x89ABCDEF -#define FLASH_PEKEY2 0x02030405 - -static inline void STM32_L0_L1_EEPROM_WaitNotBusy(void) { - while (FLASH->SR & FLASH_SR_BSY) { - __WFI(); - } -} - -static inline void STM32_L0_L1_EEPROM_Unlock(void) { - STM32_L0_L1_EEPROM_WaitNotBusy(); - if (FLASH->PECR & FLASH_PECR_PELOCK) { - FLASH->PEKEYR = FLASH_PEKEY1; - FLASH->PEKEYR = FLASH_PEKEY2; - } -} - -static inline void STM32_L0_L1_EEPROM_Lock(void) { - STM32_L0_L1_EEPROM_WaitNotBusy(); - FLASH->PECR |= FLASH_PECR_PELOCK; -} - -void eeprom_driver_init(void) {} - -void eeprom_driver_erase(void) { - STM32_L0_L1_EEPROM_Unlock(); - - for (size_t offset = 0; offset < STM32_ONBOARD_EEPROM_SIZE; offset += sizeof(uint32_t)) { - FLASH->PECR |= FLASH_PECR_ERASE | FLASH_PECR_DATA; - - *(__IO uint32_t *)EEPROM_ADDR(offset) = (uint32_t)0; - - STM32_L0_L1_EEPROM_WaitNotBusy(); - FLASH->PECR &= ~(FLASH_PECR_ERASE | FLASH_PECR_DATA); - } - - STM32_L0_L1_EEPROM_Lock(); -} - -void eeprom_read_block(void *buf, const void *addr, size_t len) { - for (size_t offset = 0; offset < len; ++offset) { - // Drop out if we've hit the limit of the EEPROM - if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) { - break; - } - - STM32_L0_L1_EEPROM_WaitNotBusy(); - BUFFER_BYTE(buf, offset) = EEPROM_BYTE(addr, offset); - } -} - -void eeprom_write_block(const void *buf, void *addr, size_t len) { - STM32_L0_L1_EEPROM_Unlock(); - - for (size_t offset = 0; offset < len; ++offset) { - // Drop out if we've hit the limit of the EEPROM - if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) { - break; - } - - STM32_L0_L1_EEPROM_WaitNotBusy(); - EEPROM_BYTE(addr, offset) = BUFFER_BYTE(buf, offset); - } - - STM32_L0_L1_EEPROM_Lock(); -} diff --git a/drivers/eeprom/eeprom_stm32_L0_L1.h b/drivers/eeprom/eeprom_stm32_L0_L1.h deleted file mode 100644 index a35defca8b..0000000000 --- a/drivers/eeprom/eeprom_stm32_L0_L1.h +++ /dev/null @@ -1,33 +0,0 @@ -/* Copyright 2020 Nick Brassel (tzarc) - * - * 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 2 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 <http://www.gnu.org/licenses/>. - */ - -#pragma once - -/* - The size used by the STM32 L0/L1 EEPROM driver. -*/ -#ifndef STM32_ONBOARD_EEPROM_SIZE -# ifdef VIA_ENABLE -# define STM32_ONBOARD_EEPROM_SIZE 1024 -# else -# include "eeconfig.h" -# define STM32_ONBOARD_EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO and EEPROM page sizing -# endif -#endif - -#if STM32_ONBOARD_EEPROM_SIZE > 128 -# pragma message("Please note: resetting EEPROM using an STM32L0/L1 device takes up to 1 second for every 1kB of internal EEPROM used.") -#endif |