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/**
* @file flash.h
* Provides functionality for using an external SPI flash
*
* Copyright (C) 2018 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef FLASH_H_
#define FLASH_H_
#include <stdint.h>
/**
* Initializes GPIO ports and variables for flash IO. Must be called before
* any reads or writes.
*/
void flash_init(void);
/**
* Does a blocking read of the flash chip into a pre-allocated buffer.
* @param buf the buffer to read in to
* @param addr the address to read from in the flash chip
* @param count the number of bytes to read from the chip
*/
void flash_read(char *buf, uint32_t addr, unsigned int count);
/**
* Does a blocking write to the flash chip using data from a pre-allocated
* buffer.
* @param buf the buffer to read data from
* @param addr the address to write to in the flash chip
* @param count the number of bytes to write to the chip
*/
void flash_write(const char *buf, uint32_t addr, unsigned int count);
#endif // FLASH_H_
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