Diff: nordic/nrf-sdk/ble/ble_flash.h

Revision:

0:eff01767de02

Child:

37:c29c330d942c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nordic/nrf-sdk/ble/ble_flash.h	Wed Mar 26 14:38:17 2014 +0000
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+/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+/** @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 <nrf51.h>
+#include "nordic_global.h"
+
+#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->BOOTLOADERADDR != BLE_FLASH_EMPTY_MASK) \
+        ? (NRF_UICR->BOOTLOADERADDR / 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 calulated.
+ * @param[in]  size     Number of bytes on which the CRC is to be calulated.
+ * @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);
+
+#endif // BLE_FLASH_H__
+
+/** @} */