mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-04-01 17:10:20 +02:00
69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
/**
|
|
* @file flash.h
|
|
* @brief Header for on-chip flash read/write driver (XIP memory-mapped)
|
|
* @author Kevin Thomas
|
|
* @date 2025
|
|
*
|
|
* MIT License
|
|
*
|
|
* Copyright (c) 2025 Kevin Thomas
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#ifndef FLASH_H
|
|
#define FLASH_H
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#define FLASH_DRIVER_SIZE_BYTES (4 * 1024 * 1024)
|
|
#define FLASH_DRIVER_SECTOR_SIZE 4096
|
|
#define FLASH_DRIVER_PAGE_SIZE 256
|
|
|
|
/**
|
|
* @brief Erase one 4096-byte sector and write data to on-chip flash
|
|
*
|
|
* The target address must be aligned to a 4096-byte sector boundary.
|
|
* The function disables interrupts, erases the containing sector,
|
|
* programs up to @p len bytes from @p data, and re-enables interrupts. The
|
|
* write length must be a multiple of FLASH_DRIVER_PAGE_SIZE (256 bytes);
|
|
* pad with 0xFF if necessary.
|
|
*
|
|
* @param flash_offset Byte offset from the start of flash (must be sector-aligned)
|
|
* @param data Pointer to the data buffer to write
|
|
* @param len Number of bytes to write (multiple of FLASH_DRIVER_PAGE_SIZE)
|
|
*/
|
|
void flash_driver_write(uint32_t flash_offset, const uint8_t *data, uint32_t len);
|
|
|
|
/**
|
|
* @brief Read bytes from on-chip flash via the XIP memory map
|
|
*
|
|
* Flash is memory-mapped starting at XIP_BASE (0x10000000). This function
|
|
* copies @p len bytes beginning at @p flash_offset into @p out using the
|
|
* XIP read path, which is always available without erasing.
|
|
*
|
|
* @param flash_offset Byte offset from the start of flash
|
|
* @param out Pointer to the destination buffer (must be @p len bytes)
|
|
* @param len Number of bytes to read
|
|
*/
|
|
void flash_driver_read(uint32_t flash_offset, uint8_t *out, uint32_t len);
|
|
|
|
#endif // FLASH_H
|