/** * Copyright (c) 2012 - 2017, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /** @file * * @defgroup ble_flash_module Flash Manager * @{ * @ingroup ble_sdk_lib * @brief Module for accessing flash memory. * * @details It contains functions for reading, writing and erasing one page in flash. * * The module uses the first 32 bits of the flash page to write a magic number in order to * determine if the page has been written or not. * * @note Be careful not to use a page number in the SoftDevice area (which currently occupies the * range 0 to 127), or in your application space! In both cases, this would end up * with a hard fault. */ #ifndef BLE_FLASH_H__ #define BLE_FLASH_H__ #include #include #include "nrf.h" #ifdef __cplusplus extern "C" { #endif #define BLE_FLASH_PAGE_SIZE ((uint16_t)NRF_FICR->CODEPAGESIZE) /**< Size of one flash page. */ #define BLE_FLASH_MAGIC_NUMBER 0x45DE0000 /**< Magic value to identify if flash contains valid data. */ #define BLE_FLASH_EMPTY_MASK 0xFFFFFFFF /**< Bit mask that defines an empty address in flash. */ /**@brief Macro for getting the end of the flash available for application. * * @details The result flash page number indicates the end boundary of the flash available * to the application. If a bootloader is used, the end will be the start of the * bootloader region. Otherwise, the end will be the size of the flash. */ #define BLE_FLASH_PAGE_END \ ((NRF_UICR->NRFFW[0] != BLE_FLASH_EMPTY_MASK) \ ? (NRF_UICR->NRFFW[0] / BLE_FLASH_PAGE_SIZE) \ : NRF_FICR->CODESIZE) /**@brief Function for erasing the specified flash page, and then writes the given data to this page. * * @warning This operation blocks the CPU. DO NOT use while in a connection! * * @param[in] page_num Page number to update. * @param[in] p_in_array Pointer to a RAM area containing the elements to write in flash. * This area has to be 32 bits aligned. * @param[in] word_count Number of 32 bits words to write in flash. * * @return NRF_SUCCESS on successful flash write, otherwise an error code. */ uint32_t ble_flash_page_write(uint8_t page_num, uint32_t * p_in_array, uint8_t word_count); /**@brief Function for reading data from flash to RAM. * * @param[in] page_num Page number to read. * @param[out] p_out_array Pointer to a RAM area where the found data will be written. * This area has to be 32 bits aligned. * @param[out] p_word_count Number of 32 bits words read. * * @return NRF_SUCCESS on successful upload, NRF_ERROR_NOT_FOUND if no valid data has been found * in flash (first 32 bits not equal to the MAGIC_NUMBER + CRC). */ uint32_t ble_flash_page_read(uint8_t page_num, uint32_t * p_out_array, uint8_t * p_word_count); /**@brief Function for erasing a flash page. * * @note This operation blocks the CPU, so it should not be done while the radio is running! * * @param[in] page_num Page number to erase. * * @return NRF_SUCCESS on success, an error_code otherwise. */ uint32_t ble_flash_page_erase(uint8_t page_num); /**@brief Function for writing one word to flash. * * @note Flash location to be written must have been erased previously. * * @param[in] p_address Pointer to flash location to be written. * @param[in] value Value to write to flash. * * @return NRF_SUCCESS. */ uint32_t ble_flash_word_write(uint32_t * p_address, uint32_t value); /**@brief Function for writing a data block to flash. * * @note Flash locations to be written must have been erased previously. * * @param[in] p_address Pointer to start of flash location to be written. * @param[in] p_in_array Pointer to start of flash block to be written. * @param[in] word_count Number of words to be written. * * @return NRF_SUCCESS. */ uint32_t ble_flash_block_write(uint32_t * p_address, uint32_t * p_in_array, uint16_t word_count); /**@brief Function for computing pointer to start of specified flash page. * * @param[in] page_num Page number. * @param[out] pp_page_addr Pointer to start of flash page. * * @return NRF_SUCCESS. */ uint32_t ble_flash_page_addr(uint8_t page_num, uint32_t ** pp_page_addr); /**@brief Function for calculating a 16 bit CRC using the CRC-16-CCITT scheme. * * @param[in] p_data Pointer to data on which the CRC is to be calculated. * @param[in] size Number of bytes on which the CRC is to be calculated. * @param[in] p_crc Initial CRC value (if NULL, a preset value is used as the initial value). * * @return Calculated CRC. */ uint16_t ble_flash_crc16_compute(uint8_t * p_data, uint16_t size, uint16_t * p_crc); /**@brief Function for handling flashing module Radio Notification event. * * @note For flash writing to work safely while in a connection or while advertising, this function * MUST be called from the Radio Notification module's event handler (see * @ref ble_radio_notification for details). * * @param[in] radio_active TRUE if radio is active (or about to become active), FALSE otherwise. */ void ble_flash_on_radio_active_evt(bool radio_active); #ifdef __cplusplus } #endif #endif // BLE_FLASH_H__ /** @} */