mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 11:44:31 +00:00
98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "touch.hpp"
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#include <cstdint>
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#include "adc.hpp"
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#include "utility.hpp"
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#include "hal.h"
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using namespace lpc43xx;
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#include "hackrf_hal.hpp"
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using namespace hackrf::one;
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#include "portapack_adc.hpp"
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#include "portapack_shared_memory.hpp"
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namespace touch {
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namespace adc {
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constexpr uint8_t adc0_sel =
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(1 << portapack::adc0_touch_xp_input)
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| (1 << portapack::adc0_touch_xn_input)
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| (1 << portapack::adc0_touch_yp_input)
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| (1 << portapack::adc0_touch_yn_input)
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;
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const auto adc0_interrupt_mask = flp2(adc0_sel);
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constexpr lpc43xx::adc::CR adc0_cr {
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.sel = adc0_sel,
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.clkdiv = 49, /* 400kHz sample rate, 2.5us/sample @ 200MHz PCLK */
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.resolution = 9, /* Ten clocks */
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.edge = 0,
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};
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constexpr lpc43xx::adc::Config adc0_config {
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.cr = adc0_cr,
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};
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void init() {
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adc0.clock_enable();
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adc0.interrupts_disable();
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adc0.power_up(adc0_config);
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adc0.interrupts_enable(adc0_interrupt_mask);
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}
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void start() {
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adc0.start_burst();
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}
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// static constexpr bool monitor_overruns_and_not_dones = false;
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Samples get() {
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const auto& frame = shared_memory.touch_adc_frame;
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const auto xp = frame.dr[portapack::adc0_touch_xp_input];
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const auto xn = frame.dr[portapack::adc0_touch_xn_input];
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const auto yp = frame.dr[portapack::adc0_touch_yp_input];
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const auto yn = frame.dr[portapack::adc0_touch_yn_input];
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// if( monitor_overruns_and_not_dones ) {
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// const auto dr_and = xp & xn & yp & yn;
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// const auto dr_or = xp | xn | yp | yn;
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// const bool done = (dr_and >> 31) & 1;
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// const bool overrun = (dr_or >> 30) & 1;
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// led_tx.write(overrun);
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// led_rx.write(!done);
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// }
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return {
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(xp >> 6) & 0x3ff,
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(xn >> 6) & 0x3ff,
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(yp >> 6) & 0x3ff,
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(yn >> 6) & 0x3ff,
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};
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}
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} /* namespace adc */
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} /* namespace touch */
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