diff options
Diffstat (limited to 'lib/lufa/Projects/MIDIToneGenerator/MIDIToneGenerator.c')
| -rw-r--r-- | lib/lufa/Projects/MIDIToneGenerator/MIDIToneGenerator.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/lib/lufa/Projects/MIDIToneGenerator/MIDIToneGenerator.c b/lib/lufa/Projects/MIDIToneGenerator/MIDIToneGenerator.c deleted file mode 100644 index 6d9e08a19d..0000000000 --- a/lib/lufa/Projects/MIDIToneGenerator/MIDIToneGenerator.c +++ /dev/null @@ -1,252 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaims all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * Main source file for the MIDI demo. This file contains the main tasks of - * the demo and is responsible for the initial application hardware configuration. - */ - -#include "MIDIToneGenerator.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 Keyboard_MIDI_Interface = - { - .Config = - { - .StreamingInterfaceNumber = INTERFACE_ID_AudioStream, - .DataINEndpoint = - { - .Address = MIDI_STREAM_IN_EPADDR, - .Size = MIDI_STREAM_EPSIZE, - .Banks = 1, - }, - .DataOUTEndpoint = - { - .Address = MIDI_STREAM_OUT_EPADDR, - .Size = MIDI_STREAM_EPSIZE, - .Banks = 1, - }, - }, - }; - -/** 8-bit 256 entry Sine Wave lookup table */ -static const uint8_t SineTable[256] = -{ - 128, 131, 134, 137, 140, 143, 146, 149, 152, 156, 159, 162, 165, 168, 171, 174, - 176, 179, 182, 185, 188, 191, 193, 196, 199, 201, 204, 206, 209, 211, 213, 216, - 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 237, 239, 240, 242, 243, 245, - 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 254, 255, 255, 255, 255, 255, - 255, 255, 255, 255, 255, 255, 254, 254, 253, 252, 252, 251, 250, 249, 248, 247, - 246, 245, 243, 242, 240, 239, 237, 236, 234, 232, 230, 228, 226, 224, 222, 220, - 218, 216, 213, 211, 209, 206, 204, 201, 199, 196, 193, 191, 188, 185, 182, 179, - 176, 174, 171, 168, 165, 162, 159, 156, 152, 149, 146, 143, 140, 137, 134, 131, - 128, 124, 121, 118, 115, 112, 109, 106, 103, 99, 96, 93, 90, 87, 84, 81, - 79, 76, 73, 70, 67, 64, 62, 59, 56, 54, 51, 49, 46, 44, 42, 39, - 37, 35, 33, 31, 29, 27, 25, 23, 21, 19, 18, 16, 15, 13, 12, 10, - 9, 8, 7, 6, 5, 4, 3, 3, 2, 1, 1, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 3, 4, 5, 6, 7, 8, - 9, 10, 12, 13, 15, 16, 18, 19, 21, 23, 25, 27, 29, 31, 33, 35, - 37, 39, 42, 44, 46, 49, 51, 54, 56, 59, 62, 64, 67, 70, 73, 76, - 79, 81, 84, 87, 90, 93, 96, 99, 103, 106, 109, 112, 115, 118, 121, 124, -}; - -/** Array of structures describing each note being generated */ -static DDSNoteData NoteData[MAX_SIMULTANEOUS_NOTES]; - - -/** Main program entry point. This routine contains the overall program flow, including initial - * setup of all components and the main program loop. - */ -int main(void) -{ - SetupHardware(); - - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - GlobalInterruptEnable(); - - for (;;) - { - MIDI_EventPacket_t ReceivedMIDIEvent; - if (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent)) - { - if ((ReceivedMIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && ((ReceivedMIDIEvent.Data1 & 0x0F) == 0)) - { - DDSNoteData* LRUNoteStruct = &NoteData[0]; - - /* Find a free entry in the note table to use for the note being turned on */ - for (uint8_t i = 0; i < MAX_SIMULTANEOUS_NOTES; i++) - { - /* Check if the note is unused */ - if (!(NoteData[i].Pitch)) - { - /* If a note is unused, it's age is essentially infinite - always prefer unused note entries */ - LRUNoteStruct = &NoteData[i]; - break; - } - else if (NoteData[i].LRUAge >= LRUNoteStruct->LRUAge) - { - /* If an older entry that the current entry has been found, prefer overwriting that one */ - LRUNoteStruct = &NoteData[i]; - } - - NoteData[i].LRUAge++; - } - - /* Update the oldest note entry with the new note data and reset its age */ - LRUNoteStruct->Pitch = ReceivedMIDIEvent.Data2; - LRUNoteStruct->TableIncrement = (uint32_t)(BASE_INCREMENT * SCALE_FACTOR) + - ((uint32_t)(BASE_INCREMENT * NOTE_OCTIVE_RATIO * SCALE_FACTOR) * - (ReceivedMIDIEvent.Data2 - BASE_PITCH_INDEX)); - LRUNoteStruct->TablePosition = 0; - LRUNoteStruct->LRUAge = 0; - - /* Turn on indicator LED to indicate note generation activity */ - LEDs_SetAllLEDs(LEDS_LED1); - } - else if ((ReceivedMIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_OFF)) && ((ReceivedMIDIEvent.Data1 & 0x0F) == 0)) - { - bool FoundActiveNote = false; - - /* Find the note in the note table to turn off */ - for (uint8_t i = 0; i < MAX_SIMULTANEOUS_NOTES; i++) - { - if (NoteData[i].Pitch == ReceivedMIDIEvent.Data2) - NoteData[i].Pitch = 0; - else if (NoteData[i].Pitch) - FoundActiveNote = true; - } - - /* If all notes off, turn off the indicator LED */ - if (!(FoundActiveNote)) - LEDs_SetAllLEDs(LEDS_NO_LEDS); - } - } - - MIDI_Device_USBTask(&Keyboard_MIDI_Interface); - USB_USBTask(); - } -} - -/** ISR to handle the reloading of the PWM timer with the next sample. */ -ISR(TIMER0_COMPA_vect, ISR_BLOCK) -{ - uint16_t MixedSample = 0; - - /* Sum together all the active notes to form a single sample */ - for (uint8_t i = 0; i < MAX_SIMULTANEOUS_NOTES; i++) - { - /* A non-zero pitch indicates the note is active */ - if (NoteData[i].Pitch) - { - /* Use the top 8 bits of the table position as the sample table index */ - uint8_t TableIndex = (NoteData[i].TablePosition >> 24); - - /* Add the new tone sample to the accumulator and increment the table position */ - MixedSample += SineTable[TableIndex]; - NoteData[i].TablePosition += NoteData[i].TableIncrement; - } - } - - /* Output clamped mixed sample value to the PWM */ - OCR3A = (MixedSample <= 0xFF) ? MixedSample : 0xFF; -} - -/** Configures the board hardware and chip peripherals for the demo's functionality. */ -void SetupHardware(void) -{ -#if (ARCH == ARCH_AVR8) - /* Disable watchdog if enabled by bootloader/fuses */ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - /* Disable clock division */ - clock_prescale_set(clock_div_1); -#endif - - /* Hardware Initialization */ - LEDs_Init(); - USB_Init(); - - /* Sample reload timer initialization */ - TIMSK0 = (1 << OCIE0A); - OCR0A = (VIRTUAL_SAMPLE_TABLE_SIZE / 8); - TCCR0A = (1 << WGM01); // CTC mode - TCCR0B = (1 << CS01); // Fcpu/8 speed - - /* Set speaker as output */ - DDRC |= (1 << 6); - - /* PWM speaker timer initialization */ - TCCR3A = ((1 << WGM31) | (1 << COM3A1) | (1 << COM3A0)); // Set on match, clear on TOP - TCCR3B = ((1 << WGM32) | (1 << CS30)); // Fast 8-Bit PWM, Fcpu speed -} - -/** Event handler for the library USB Connection event. */ -void EVENT_USB_Device_Connect(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); - - /* Set speaker as output */ - DDRC |= (1 << 6); -} - -/** Event handler for the library USB Disconnection event. */ -void EVENT_USB_Device_Disconnect(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - - /* Disable any notes currently being played */ - for (uint8_t i = 0; i < MAX_SIMULTANEOUS_NOTES; i++) - NoteData[i].Pitch = 0; - - /* Set speaker as input to reduce current draw */ - DDRC &= ~(1 << 6); -} - -/** Event handler for the library USB Configuration Changed event. */ -void EVENT_USB_Device_ConfigurationChanged(void) -{ - bool ConfigSuccess = true; - - ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface); - - LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); -} - -/** Event handler for the library USB Control Request event. */ -void EVENT_USB_Device_ControlRequest(void) -{ - MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface); -} - |