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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | /** * 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(); } |