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/*
* spreadspace avr utils
*
*
* Copyright (C) 2013-2014 Christian Pointner <equinox@spreadspace.org>
*
* This file is part of spreadspace avr utils.
*
* spreadspace avr utils 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
* any later version.
*
* spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <avr/power.h>
#include <stdio.h>
/*
LUFA Library
Copyright (C) Dean Camera, 2012.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
#include <LUFA/Version.h>
#include <LUFA/Drivers/USB/USB.h>
#include "lufa-descriptor-midi.h"
/** LUFA MIDI Class driver interface configuration and state information. This structure is
* passed to all MIDI Class driver functions, so that multiple instances of the same class
* within a device can be differentiated from one another.
*/
USB_ClassInfo_MIDI_Device_t MIDI_Interface =
{
.Config =
{
.StreamingInterfaceNumber = 1,
.DataINEndpointNumber = MIDI_STREAM_IN_EPNUM,
.DataINEndpointSize = MIDI_STREAM_EPSIZE,
.DataINEndpointDoubleBank = false,
.DataOUTEndpointNumber = MIDI_STREAM_OUT_EPNUM,
.DataOUTEndpointSize = MIDI_STREAM_EPSIZE,
.DataOUTEndpointDoubleBank = false,
},
};
/** Event handler for the library USB Configuration Changed event. */
void EVENT_USB_Device_ConfigurationChanged(void)
{
MIDI_Device_ConfigureEndpoints(&MIDI_Interface);
}
/** Event handler for the library USB Control Request reception event. */
void EVENT_USB_Device_ControlRequest(void)
{
MIDI_Device_ProcessControlRequest(&MIDI_Interface);
}
/* end LUFA MIDI Class driver specific definitions*/
#include "util.h"
#include "keypad.h"
#include "eventqueue.h"
#define MIDI_COMMAND_CONTROL_CHANGE 0xB0
static void process_incoming_midi(void)
{
MIDI_EventPacket_t ReceivedMIDIEvent;
while(MIDI_Device_ReceiveEventPacket(&MIDI_Interface, &ReceivedMIDIEvent)) {
uint8_t cmd = ReceivedMIDIEvent.Data1 & 0xF0;
uint8_t note = ReceivedMIDIEvent.Data2;
uint8_t value = ReceivedMIDIEvent.Data3 & 0x7F;
if((note >= KEYPAD_MIDI_NOTE_OFFSET && note < KEYPAD_MIDI_NOTE_OFFSET + KEYPAD_NUM_KEYS) || // KEYPAD
note == KEYPAD_MIDI_NOTE_ALL) {
if(cmd == MIDI_COMMAND_NOTE_ON) {
switch(value) {
case 0: keypad_led_on(note - KEYPAD_MIDI_NOTE_OFFSET); break;
case 1: keypad_led_toggle(note - KEYPAD_MIDI_NOTE_OFFSET); break;
default: keypad_led_blink(note, value); break;
}
} else if(cmd == MIDI_COMMAND_NOTE_OFF)
keypad_led_off(note - KEYPAD_MIDI_NOTE_OFFSET);
}
}
}
static void process_outgoing_midi(void)
{
MIDI_EventPacket_t MIDIEventOn = (MIDI_EventPacket_t)
{
.CableNumber = 0, // TODO: hardcoded value
.Command = (MIDI_COMMAND_NOTE_ON >> 4),
.Data1 = MIDI_COMMAND_NOTE_ON | 0,
.Data2 = 0,
.Data3 = 0x7F,
};
MIDI_EventPacket_t MIDIEventOff = (MIDI_EventPacket_t)
{
.CableNumber = 0, // TODO: hardcoded value
.Command = (MIDI_COMMAND_NOTE_OFF >> 4),
.Data1 = MIDI_COMMAND_NOTE_OFF | 0,
.Data2 = 0,
.Data3 = 0,
};
uint8_t key, state;
while(eventqueue_pop(&key, &state)) {
if (USB_DeviceState == DEVICE_STATE_Configured) {
MIDI_EventPacket_t* MIDIEvent = NULL;
MIDIEvent = state ? &MIDIEventOn : &MIDIEventOff;
MIDIEvent->Data2 = key;
if(MIDIEvent)
MIDI_Device_SendEventPacket(&MIDI_Interface, MIDIEvent);
}
}
if (USB_DeviceState == DEVICE_STATE_Configured)
MIDI_Device_Flush(&MIDI_Interface);
}
int main(void)
{
MCUSR &= ~(1 << WDRF);
wdt_disable();
cpu_init();
eventqueue_init();
keypad_init();
USB_Init();
sei();
for(;;) {
process_incoming_midi();
keypad_task();
process_outgoing_midi();
MIDI_Device_USBTask(&MIDI_Interface);
USB_USBTask();
}
}
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