mirror of https://github.com/probonopd/MiniDexed
Enable buttons on MIDI controllers to be used (#365)
* Initial commit for MIDI user interface button support. Status: first successful build. * Second try with more functionality plugged in and compiling... * First "it seems to work for me" version for initial testing of MIDI buttons. * Fix Off/Omni logic * Fix order of Prev/Next when initialising the button UI. Co-authored-by: Kevin <68612569+diyelectromusic@users.noreply.github.com>pull/366/head^2
probonopd
2 years ago
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//
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// midipin.cpp
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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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 3 of the License, or
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// (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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//
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#include "midipin.h" |
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#include <circle/logger.h> |
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#include <assert.h> |
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LOGMODULE ("midipin"); |
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CMIDIPin::CMIDIPin (unsigned nPinNumber) |
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: m_nPinNumber (nPinNumber), |
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m_nValue (HIGH) |
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{ |
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} |
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CMIDIPin::~CMIDIPin (void) |
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{ |
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} |
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unsigned CMIDIPin::Read (void) |
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{ |
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return m_nValue; |
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} |
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void CMIDIPin::Write (unsigned nValue) |
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{ |
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// Takes values in the MIDI controller range 0 to 127
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// and OFF < 64 < ON.
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// Simulates a PULLUP IO pin, so "true" is LOW (0)
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if (nValue >= 64) { |
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// "on"
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m_nValue = LOW; |
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} else { |
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// "off"
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m_nValue = HIGH; |
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} |
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return; |
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} |
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//
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// midipin.h
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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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 3 of the License, or
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// (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef _midipin_h |
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#define _midipin_h |
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#include <circle/gpiopin.h> |
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#include <circle/types.h> |
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// MIDI CC numbers go 0 to 127.
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// Normal GPIO pins are below 100.
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// So use a "pin number" of 128 + MIDI CC message for a "MIDI Pin"
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#define MIDI_PINS 128 |
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#define ccToMidiPin(c) ((c)+MIDI_PINS) |
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#define MidiPinToCC(p) ((p)-MIDI_PINS) |
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#define isMidiPin(p) (((p)>=MIDI_PINS)?1:0) |
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class CMIDIPin |
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{ |
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public: |
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CMIDIPin (unsigned nPinNumber); // pinNumber = ccToMidiPin (MIDI CC number)
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~CMIDIPin (void); |
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// Will return MP_HIGH or MP_LOW.
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// Should be treated as a PULLED UP IO pin
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// i.e. treated as "active low" (LOW) when pressed.
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unsigned Read (void); |
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// MIDI CC values >=64 will set the MIDI pin to LOW ("on")
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// MIDI CC values <= 63 will set the MIDI pin to HIGH ("off")
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void Write (unsigned nValue); |
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private: |
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unsigned m_nPinNumber; |
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unsigned m_nValue; |
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}; |
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#endif |
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