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/*
* Copyright 2013-2022 Great Scott Gadgets <info@greatscottgadgets.com>
* Copyright 2013 Jared Boone <jared@sharebrained.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 <gpdma.h>
#include <libopencm3/lpc43xx/gpdma.h>
void gpdma_controller_enable()
{
GPDMA_CONFIG |= GPDMA_CONFIG_E(1);
while ((GPDMA_CONFIG & GPDMA_CONFIG_E_MASK) == 0) {}
}
void gpdma_channel_enable(const uint_fast8_t channel)
{
GPDMA_CCONFIG(channel) |= GPDMA_CCONFIG_E(1);
}
void gpdma_channel_disable(const uint_fast8_t channel)
{
GPDMA_CCONFIG(channel) &= ~GPDMA_CCONFIG_E_MASK;
while (GPDMA_ENBLDCHNS & GPDMA_ENBLDCHNS_ENABLEDCHANNELS(1 << channel)) {}
}
void gpdma_channel_interrupt_tc_clear(const uint_fast8_t channel)
{
GPDMA_INTTCCLEAR = GPDMA_INTTCCLEAR_INTTCCLEAR(1 << channel);
}
void gpdma_channel_interrupt_error_clear(const uint_fast8_t channel)
{
GPDMA_INTERRCLR = GPDMA_INTERRCLR_INTERRCLR(1 << channel);
}
void gpdma_lli_enable_interrupt(gpdma_lli_t* const lli)
{
lli->ccontrol |= GPDMA_CCONTROL_I(1);
}
void gpdma_lli_create_loop(gpdma_lli_t* const lli, const size_t lli_count)
{
for (size_t i = 0; i < lli_count; i++) {
gpdma_lli_t* const next_lli = &lli[(i + 1) % lli_count];
lli[i].clli = (lli[i].clli & ~GPDMA_CLLI_LLI_MASK) |
GPDMA_CLLI_LLI((uint32_t) next_lli >> 2);
}
}
void gpdma_lli_create_oneshot(gpdma_lli_t* const lli, const size_t lli_count)
{
gpdma_lli_create_loop(lli, lli_count);
lli[lli_count - 1].clli &= ~GPDMA_CLLI_LLI_MASK;
}
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