137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
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Copyright (C) 2021 Westberry Technology (ChangZhou) Corp., Ltd
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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/* All the following default configurations are based on MX25L4006E Nor FLASH. */
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/*
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The slave select pin of the FLASH.
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This needs to be a normal GPIO pin_t value, such as B14.
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*/
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#ifndef EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN
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# error "No chip select pin defined -- missing EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN"
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#endif
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/*
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The clock divisor for SPI to ensure that the MCU is within the
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specifications of the FLASH chip. Generally this will be PCLK divided by
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the intended divisor -- check your clock settings and the datasheet of
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your FLASH.
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*/
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#ifndef EXTERNAL_FLASH_SPI_CLOCK_DIVISOR
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# ifdef __AVR__
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# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 4
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# else
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# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 8
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# endif
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#endif
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/*
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The SPI mode to communicate with the FLASH.
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*/
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#ifndef EXTERNAL_FLASH_SPI_MODE
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# define EXTERNAL_FLASH_SPI_MODE 0
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#endif
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/*
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Whether or not the SPI communication between the MCU and FLASH should be
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LSB-first.
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*/
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#ifndef EXTERNAL_FLASH_SPI_LSBFIRST
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# define EXTERNAL_FLASH_SPI_LSBFIRST false
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#endif
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/*
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The Flash address size in bytes, as specified in datasheet.
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*/
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#ifndef EXTERNAL_FLASH_ADDRESS_SIZE
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# define EXTERNAL_FLASH_ADDRESS_SIZE 3
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#endif
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/*
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The page size of the FLASH in bytes, as specified in the datasheet.
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*/
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#ifndef EXTERNAL_FLASH_PAGE_SIZE
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# define EXTERNAL_FLASH_PAGE_SIZE 256
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#endif
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/*
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The sector size of the FLASH in bytes, as specified in the datasheet.
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*/
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#ifndef EXTERNAL_FLASH_SECTOR_SIZE
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# define EXTERNAL_FLASH_SECTOR_SIZE (4 * 1024L)
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#endif
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/*
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The block size of the FLASH in bytes, as specified in the datasheet.
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*/
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#ifndef EXTERNAL_FLASH_BLOCK_SIZE
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# define EXTERNAL_FLASH_BLOCK_SIZE (64 * 1024L)
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#endif
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/*
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The total size of the FLASH in bytes, as specified in the datasheet.
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*/
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#ifndef EXTERNAL_FLASH_SIZE
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# define EXTERNAL_FLASH_SIZE (512 * 1024L)
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#endif
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/*
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The block count of the FLASH, calculated by total FLASH size and block size.
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*/
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#define EXTERNAL_FLASH_BLOCK_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_BLOCK_SIZE))
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/*
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The sector count of the FLASH, calculated by total FLASH size and sector size.
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*/
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#define EXTERNAL_FLASH_SECTOR_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_SECTOR_SIZE))
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/*
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The page count of the FLASH, calculated by total FLASH size and page size.
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*/
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#define EXTERNAL_FLASH_PAGE_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_PAGE_SIZE))
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typedef int16_t flash_status_t;
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#define FLASH_STATUS_SUCCESS (0)
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#define FLASH_STATUS_ERROR (-1)
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#define FLASH_STATUS_TIMEOUT (-2)
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#define FLASH_STATUS_BAD_ADDRESS (-3)
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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void flash_init(void);
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flash_status_t flash_erase_chip(void);
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flash_status_t flash_erase_block(uint32_t addr);
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flash_status_t flash_erase_sector(uint32_t addr);
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flash_status_t flash_read_block(uint32_t addr, void *buf, size_t len);
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flash_status_t flash_write_block(uint32_t addr, const void *buf, size_t len);
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#ifdef __cplusplus
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}
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#endif
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