80 lines
3.1 KiB
C
80 lines
3.1 KiB
C
/**************************************************************************/
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/*!
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@file flash_nrf5x.c
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2018, Adafruit Industries (adafruit.com)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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 ) nrf_nvmc_page_erase(_fl_addr);
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nrf_nvmc_write_words(_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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