/* 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 <http://www.gnu.org/licenses/>.
 *
 */
/* Copyright (c) 2016 King Kévin <kingkevin@cuvoodoo.info> */
/* this library is used to store (read and write) data in flash */
/* peripherals used: none */
#include <libopencm3/stm32/desig.h> // device signature utilities

// how much data (in bytes) should we be able to store (be sure it's available and does not overlap the firmware)
#define STORAGE_SIZE 2048
// the end of the flash area where to store data
#define STORAGE_END FLASH_BASE+DESIG_FLASH_SIZE
// the start of the flash area where to store data (be sure it's after the firmware data)
// we will only use the last kilobytes
#define STORAGE_START STORAGE_END-STORAGE_SIZE

/* read <size> data from address <address> into <buffer>
 * returns if read succeeded */
bool storage_read(uint32_t address, uint8_t *buffer, size_t size);
/* write <size> data from <buffer> to address <address>
 * returns if write succeeded */
bool storage_write(uint32_t address, uint8_t *buffer, size_t size);