| /** |
| * Copyright (c) 2012 - 2018, 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 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 the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 |
| *@brief NMVC driver implementation |
| */ |
| |
| #include <nrfx.h> |
| #include "nrf_nvmc.h" |
| |
| static inline void wait_for_flash_ready(void) |
| { |
| while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {;} |
| } |
| |
| void nrf_nvmc_page_erase(uint32_t address) |
| { |
| // Enable erase. |
| NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een; |
| __ISB(); |
| __DSB(); |
| |
| // Erase the page |
| NRF_NVMC->ERASEPAGE = address; |
| wait_for_flash_ready(); |
| |
| NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren; |
| __ISB(); |
| __DSB(); |
| } |
| |
| |
| void nrf_nvmc_write_byte(uint32_t address, uint8_t value) |
| { |
| uint32_t byte_shift = address & (uint32_t)0x03; |
| uint32_t address32 = address & ~byte_shift; // Address to the word this byte is in. |
| uint32_t value32 = (*(uint32_t*)address32 & ~((uint32_t)0xFF << (byte_shift << (uint32_t)3))); |
| value32 = value32 + ((uint32_t)value << (byte_shift << 3)); |
| |
| // Enable write. |
| NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos); |
| __ISB(); |
| __DSB(); |
| |
| *(uint32_t*)address32 = value32; |
| wait_for_flash_ready(); |
| |
| NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos); |
| __ISB(); |
| __DSB(); |
| } |
| |
| void nrf_nvmc_write_word(uint32_t address, uint32_t value) |
| { |
| // Enable write. |
| NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen; |
| __ISB(); |
| __DSB(); |
| |
| *(uint32_t*)address = value; |
| wait_for_flash_ready(); |
| |
| NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren; |
| __ISB(); |
| __DSB(); |
| } |
| |
| void nrf_nvmc_write_bytes(uint32_t address, const uint8_t * src, uint32_t num_bytes) |
| { |
| uint32_t i; |
| for (i = 0; i < num_bytes; i++) |
| { |
| nrf_nvmc_write_byte(address + i,src[i]); |
| } |
| } |
| |
| void nrf_nvmc_write_words(uint32_t address, const uint32_t * src, uint32_t num_words) |
| { |
| uint32_t i; |
| |
| // Enable write. |
| NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen; |
| __ISB(); |
| __DSB(); |
| |
| for (i = 0; i < num_words; i++) |
| { |
| ((uint32_t*)address)[i] = src[i]; |
| wait_for_flash_ready(); |
| } |
| |
| NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren; |
| __ISB(); |
| __DSB(); |
| } |
| |