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47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/**
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* @file flash.c
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* @brief Implementation of on-chip flash read/write driver
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* @author Kevin Thomas
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* @date 2025
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*
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* MIT License
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*
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* Copyright (c) 2025 Kevin Thomas
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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 all
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* 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 THE
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* SOFTWARE.
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*/
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#include "flash.h"
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#include <string.h>
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#include "hardware/flash.h"
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#include "hardware/sync.h"
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#include "pico/stdlib.h"
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void flash_driver_write(uint32_t flash_offset, const uint8_t *data, uint32_t len) {
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uint32_t ints = save_and_disable_interrupts();
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flash_range_erase(flash_offset, FLASH_SECTOR_SIZE);
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flash_range_program(flash_offset, data, len);
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restore_interrupts(ints);
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}
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void flash_driver_read(uint32_t flash_offset, uint8_t *out, uint32_t len) {
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const uint8_t *flash_target_contents = (const uint8_t *)(XIP_BASE + flash_offset);
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memcpy(out, flash_target_contents, len);
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}
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