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/*
* Copyright 2025 Great Scott Gadgets <info@greatscottgadgets.com>
*
* This file is part of HackRF.
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "m0_state.h"
#include <libopencm3/lpc43xx/sgpio.h>
#include <stddef.h>
void m0_set_mode(enum m0_mode mode)
{
// Set requested mode and flag bit.
m0_state.requested_mode = M0_REQUEST_FLAG | mode;
// The M0 may be blocked waiting for the next SGPIO interrupt.
// In order to ensure that it sees our request, we need to set
// the interrupt flag here. The M0 will clear the flag again
// before acknowledging our request.
SGPIO_SET_STATUS_1 = (1 << SGPIO_SLICE_A);
// Wait for M0 to acknowledge by clearing the flag.
while (m0_state.requested_mode & M0_REQUEST_FLAG) {}
}
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