To get started with Seeed Tiny BLE, include detecting motion, button and battery level.
Dependencies: BLE_API eMPL_MPU6050 mbed nRF51822
Diff: nRF51822/nordic-sdk/components/drivers_nrf/ble_flash/ble_flash.c
- Revision:
- 3:24e365bd1b97
- Parent:
- 2:b61ddbb8528e
diff -r b61ddbb8528e -r 24e365bd1b97 nRF51822/nordic-sdk/components/drivers_nrf/ble_flash/ble_flash.c --- 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