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Diffstat (limited to 'drivers_nrf/ble_flash/ble_flash.h')
| -rw-r--r-- | drivers_nrf/ble_flash/ble_flash.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers_nrf/ble_flash/ble_flash.h b/drivers_nrf/ble_flash/ble_flash.h new file mode 100644 index 0000000..8fffeb6 --- /dev/null +++ b/drivers_nrf/ble_flash/ble_flash.h @@ -0,0 +1,178 @@ +/** + * 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 <stdint.h> +#include <stdbool.h> +#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__ + +/** @} */ |