/***************************************************************************
* Project                               : shakti devt board
* Name of the file                      : spi.c
* Brief Description of file             : Erase a sector of flash
* Name of Author                        : Sathya Narayanan
* Email ID                              : sathya281@gmail.com

 Copyright (C) 2020  IIT Madras. All rights reserved.

 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/>.

***************************************************************************/
/**
@file erase.c
@brief  Erase a sector of on-board flash in arty 35t/100t
@detail Contains the code to erase a sector of on-board flash using spi
protocol.
*/

#include <stdint.h>
#include "spi.h"
#include "uart.h"

/** @fn void main()
 * @brief Configures the SPI flash and writes into a flash location.
 * @details Configures the SPI flash, Confirms the flash device id,erases a sector
 *           and then write into a flash location and prints the value.
 */
void main()
{
	configure_spi(SPI0_OFFSET);
	spi_init();

	printf("SPI init done\n");

	flash_device_id();

	waitfor(200);

	flash_write_enable();
	flash_erase(0x00b00000); //erases an entire sector
	flash_status_register_read();
	printf("\nErase complete");

	asm volatile ("ebreak");
}