Diff: nRF51822/nordic-sdk/components/drivers_nrf/ble_flash/ble_flash.c

Revision:

3:24e365bd1b97

Parent:

2:b61ddbb8528e

--- a/nRF51822/nordic-sdk/components/drivers_nrf/ble_flash/ble_flash.c	Thu Nov 05 02:46:37 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,287 +0,0 @@
-/* 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.
- *
- */
-
-#include "ble_flash.h"
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-#include "nrf_soc.h"
-#include "nordic_common.h"
-#include "nrf_error.h"
-#include "nrf.h"
-#include "nrf51_bitfields.h"
-#include "app_util.h"
-
-
-static volatile bool m_radio_active = false;  /**< TRUE if radio is active (or about to become active), FALSE otherwise. */
-
-
-uint16_t ble_flash_crc16_compute(uint8_t * p_data, uint16_t size, uint16_t * p_crc)
-{
-    uint16_t i;
-    uint16_t crc = (p_crc == NULL) ? 0xffff : *p_crc;
-
-    for (i = 0; i < size; i++)
-    {
-        crc  = (unsigned char)(crc >> 8) | (crc << 8);
-        crc ^= p_data[i];
-        crc ^= (unsigned char)(crc & 0xff) >> 4;
-        crc ^= (crc << 8) << 4;
-        crc ^= ((crc & 0xff) << 4) << 1;
-    }
-    return crc;
-}
-
-
-/**@brief Function for erasing a page in flash.
- * 
- * @param[in]  p_page  Pointer to first word in page to be erased.
- */
-static void flash_page_erase(uint32_t * p_page)
-{
-    // Turn on flash erase enable and wait until the NVMC is ready.
-    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Een << NVMC_CONFIG_WEN_Pos);
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-
-    // Erase page.
-    NRF_NVMC->ERASEPAGE = (uint32_t)p_page;
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-
-    // Turn off flash erase enable and wait until the NVMC is ready.
-    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing
-    }
-}
-
-
-/**@brief Function for writing one word to flash. Unprotected write, which can interfere with radio communication.
- *
- * @details This function DOES NOT use the m_radio_active variable, but will force the write even
- *          when the radio is active. To be used only from @ref ble_flash_page_write.
- *
- * @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.
- */
-static void flash_word_unprotected_write(uint32_t * p_address, uint32_t value)
-{
-    // Turn on flash write enable and wait until the NVMC is ready.
-    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-    *p_address = value;
-    
-    // Wait flash write to finish
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-
-    // Turn off flash write enable and wait until the NVMC is ready.
-    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-}
-
-
-/**@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.
- */
-static void flash_word_write(uint32_t * p_address, uint32_t value)
-{
-    // If radio is active, wait for it to become inactive.
-    while (m_radio_active)
-    {
-        // Do nothing (just wait for radio to become inactive).
-        (void) sd_app_evt_wait();
-    }
-
-    // Turn on flash write enable and wait until the NVMC is ready.
-    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-
-    *p_address = value;
-    // Wait flash write to finish
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing.
-    }
-    // Turn off flash write enable and wait until the NVMC is ready.
-    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
-    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
-    {
-        // Do nothing
-    }
-}
-
-
-uint32_t ble_flash_word_write(uint32_t * p_address, uint32_t value)
-{
-    flash_word_write(p_address, value);
-    return NRF_SUCCESS;
-}
-
-
-uint32_t ble_flash_block_write(uint32_t * p_address, uint32_t * p_in_array, uint16_t word_count)
-{
-    uint16_t i;
-
-    for (i = 0; i < word_count; i++)
-    {
-        flash_word_write(p_address, p_in_array[i]);
-        p_address++;
-    }
-
-    return NRF_SUCCESS;
-}
-
-
-uint32_t ble_flash_page_erase(uint8_t page_num)
-{
-    uint32_t * p_page = (uint32_t *)(BLE_FLASH_PAGE_SIZE * page_num);
-    flash_page_erase(p_page);
-
-    return NRF_SUCCESS;
-}
-
-
-uint32_t ble_flash_page_write(uint8_t page_num, uint32_t * p_in_array, uint8_t word_count)
-{
-    int        i;
-    uint32_t * p_page;
-    uint32_t * p_curr_addr;
-    uint16_t   in_data_crc;
-    uint16_t   flash_crc;
-    uint32_t   flash_header;
-
-    p_page      = (uint32_t *)(BLE_FLASH_PAGE_SIZE * page_num);
-    p_curr_addr = p_page;
-
-    // Calculate CRC of the data to write.
-    in_data_crc = ble_flash_crc16_compute((uint8_t *)p_in_array,
-                                          word_count * sizeof(uint32_t),
-                                          NULL);
-
-    // Compare the calculated to the one in flash.
-    flash_header = *p_curr_addr;
-    flash_crc    = (uint16_t)flash_header;
-
-    if (flash_crc == in_data_crc)
-    {
-        // Data is the same as the data already stored in flash, return without modifying flash.
-        return NRF_SUCCESS;
-    }
-
-    // Erase flash page
-    flash_page_erase(p_page);
-
-    // Reserve space for magic number (for detecting if flash content is valid).
-    p_curr_addr++;
-
-    // Reserve space for saving word_count.
-    p_curr_addr++;
-
-    // Write data
-    for (i = 0; i < word_count; i++)
-    {
-        flash_word_unprotected_write(p_curr_addr, p_in_array[i]);
-        p_curr_addr++;
-    }
-
-    // Write number of elements.
-    flash_word_write(p_page + 1, (uint32_t)(word_count));
-
-    // Write magic number and CRC to indicate that flash content is valid.
-    flash_header = BLE_FLASH_MAGIC_NUMBER | (uint32_t)in_data_crc;
-    flash_word_write(p_page, flash_header);
-
-    return NRF_SUCCESS;
-}
-
-
-uint32_t ble_flash_page_read(uint8_t page_num, uint32_t * p_out_array, uint8_t * p_word_count)
-{
-    int        byte_count;
-    uint32_t * p_page;
-    uint32_t * p_curr_addr;
-    uint32_t   flash_header;
-    uint32_t   calc_header;
-    uint16_t   calc_crc;
-    uint32_t   tmp;
-
-    p_page      = (uint32_t *)(BLE_FLASH_PAGE_SIZE * page_num);    
-    p_curr_addr = p_page;
-
-    // Check if block is valid
-    flash_header = *p_curr_addr;
-    tmp = flash_header & 0xFFFF0000;
-    if (tmp != BLE_FLASH_MAGIC_NUMBER)
-    {
-        *p_word_count = 0;
-        return NRF_ERROR_NOT_FOUND;
-    }
-    p_curr_addr++;
-
-    // Read number of elements
-    *p_word_count = (uint8_t)(*(p_curr_addr));
-    p_curr_addr++;
-
-    // Read data
-    byte_count = (*p_word_count) * sizeof(uint32_t);
-    memcpy(p_out_array, p_curr_addr, byte_count);
-
-    // Check CRC
-    calc_crc = ble_flash_crc16_compute((uint8_t *)p_out_array,
-                                       (*p_word_count) * sizeof(uint32_t),
-                                       NULL);
-    calc_header = BLE_FLASH_MAGIC_NUMBER | (uint32_t)calc_crc;
-
-    if (calc_header != flash_header)
-    {
-        return NRF_ERROR_NOT_FOUND;
-    }
-
-    return NRF_SUCCESS;
-}
-
-
-uint32_t ble_flash_page_addr(uint8_t page_num, uint32_t ** pp_page_addr)
-{
-    *pp_page_addr = (uint32_t *)(BLE_FLASH_PAGE_SIZE * page_num);
-    return NRF_SUCCESS;
-}
-
-
-void ble_flash_on_radio_active_evt(bool radio_active)
-{
-    m_radio_active = radio_active;
-}
\ No newline at end of file