68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Ha Thach for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "nrf_sdm.h"
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#include "flash_nrf5x.h"
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#include "boards.h"
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#define FLASH_PAGE_SIZE 4096
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#define FLASH_CACHE_INVALID_ADDR 0xffffffff
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static uint32_t _fl_addr = FLASH_CACHE_INVALID_ADDR;
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static uint8_t _fl_buf[FLASH_PAGE_SIZE] __attribute__((aligned(4)));
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void flash_nrf5x_flush (bool need_erase)
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{
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if ( _fl_addr == FLASH_CACHE_INVALID_ADDR ) return;
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if ( memcmp(_fl_buf, (void *) _fl_addr, FLASH_PAGE_SIZE) != 0 )
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{
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// - nRF52832 dfu via uart can miss incoming byte when erasing because cpu is blocked for > 2ms.
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// Since dfu_prepare_func_app_erase() already erase the page for us, we can skip it here.
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// - nRF52840 dfu serial/uf2 are USB-based which are DMA and should have no problems.
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//
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// Note: MSC uf2 does not erase page in advance like dfu serial
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if ( need_erase ) nrfx_nvmc_page_erase(_fl_addr);
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nrfx_nvmc_words_write(_fl_addr, (uint32_t *) _fl_buf, FLASH_PAGE_SIZE / 4);
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}
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_fl_addr = FLASH_CACHE_INVALID_ADDR;
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}
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void flash_nrf5x_write (uint32_t dst, void const *src, int len, bool need_erase)
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{
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uint32_t newAddr = dst & ~(FLASH_PAGE_SIZE - 1);
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if ( newAddr != _fl_addr )
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{
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flash_nrf5x_flush(need_erase);
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_fl_addr = newAddr;
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memcpy(_fl_buf, (void *) newAddr, FLASH_PAGE_SIZE);
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}
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memcpy(_fl_buf + (dst & (FLASH_PAGE_SIZE - 1)), src, len);
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}
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