--- /dev/null
+/*\r
+ LUFA Library\r
+ Copyright (C) Dean Camera, 2010.\r
+ \r
+ dean [at] fourwalledcubicle [dot] com\r
+ www.fourwalledcubicle.com\r
+*/\r
+\r
+/*\r
+ Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+ Permission to use, copy, modify, distribute, and sell this \r
+ software and its documentation for any purpose is hereby granted\r
+ without fee, provided that the above copyright notice appear in \r
+ all copies and that both that the copyright notice and this\r
+ permission notice and warranty disclaimer appear in supporting \r
+ documentation, and that the name of the author not be used in \r
+ advertising or publicity pertaining to distribution of the \r
+ software without specific, written prior permission.\r
+\r
+ The author disclaim all warranties with regard to this\r
+ software, including all implied warranties of merchantability\r
+ and fitness. In no event shall the author be liable for any\r
+ special, indirect or consequential damages or any damages\r
+ whatsoever resulting from loss of use, data or profits, whether\r
+ in an action of contract, negligence or other tortious action,\r
+ arising out of or in connection with the use or performance of\r
+ this software.\r
+*/\r
+\r
+/** \file\r
+ *\r
+ * Main source file for the MIDI demo. This file contains the main tasks of\r
+ * the demo and is responsible for the initial application hardware configuration.\r
+ */\r
+\r
+#include "MIDIToneGenerator.h"\r
+\r
+/** LUFA MIDI Class driver interface configuration and state information. This structure is\r
+ * passed to all MIDI Class driver functions, so that multiple instances of the same class\r
+ * within a device can be differentiated from one another.\r
+ */\r
+USB_ClassInfo_MIDI_Device_t Keyboard_MIDI_Interface =\r
+ {\r
+ .Config =\r
+ {\r
+ .StreamingInterfaceNumber = 1,\r
+\r
+ .DataINEndpointNumber = MIDI_STREAM_IN_EPNUM,\r
+ .DataINEndpointSize = MIDI_STREAM_EPSIZE,\r
+ .DataINEndpointDoubleBank = false,\r
+\r
+ .DataOUTEndpointNumber = MIDI_STREAM_OUT_EPNUM,\r
+ .DataOUTEndpointSize = MIDI_STREAM_EPSIZE,\r
+ .DataOUTEndpointDoubleBank = false,\r
+ },\r
+ };\r
+\r
+const uint8_t SineTable[] PROGMEM =\r
+{\r
+ 0x80, 0x83, 0x86, 0x89, 0x8c, 0x8f, 0x92, 0x95, 0x98, 0x9c, 0x9f, 0xa2, 0xa5, 0xa8, 0xab, 0xae, \r
+ 0xb0, 0xb3, 0xb6, 0xb9, 0xbc, 0xbf, 0xc1, 0xc4, 0xc7, 0xc9, 0xcc, 0xce, 0xd1, 0xd3, 0xd5, 0xd8, \r
+ 0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xed, 0xef, 0xf0, 0xf2, 0xf3, 0xf5, \r
+ 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, \r
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe, 0xfd, 0xfc, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8, 0xf7, \r
+ 0xf6, 0xf5, 0xf3, 0xf2, 0xf0, 0xef, 0xed, 0xec, 0xea, 0xe8, 0xe6, 0xe4, 0xe2, 0xe0, 0xde, 0xdc, \r
+ 0xda, 0xd8, 0xd5, 0xd3, 0xd1, 0xce, 0xcc, 0xc9, 0xc7, 0xc4, 0xc1, 0xbf, 0xbc, 0xb9, 0xb6, 0xb3, \r
+ 0xb0, 0xae, 0xab, 0xa8, 0xa5, 0xa2, 0x9f, 0x9c, 0x98, 0x95, 0x92, 0x8f, 0x8c, 0x89, 0x86, 0x83, \r
+ 0x80, 0x7c, 0x79, 0x76, 0x73, 0x70, 0x6d, 0x6a, 0x67, 0x63, 0x60, 0x5d, 0x5a, 0x57, 0x54, 0x51, \r
+ 0x4f, 0x4c, 0x49, 0x46, 0x43, 0x40, 0x3e, 0x3b, 0x38, 0x36, 0x33, 0x31, 0x2e, 0x2c, 0x2a, 0x27, \r
+ 0x25, 0x23, 0x21, 0x1f, 0x1d, 0x1b, 0x19, 0x17, 0x15, 0x13, 0x12, 0x10, 0x0f, 0x0d, 0x0c, 0x0a, \r
+ 0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, \r
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, \r
+ 0x09, 0x0a, 0x0c, 0x0d, 0x0f, 0x10, 0x12, 0x13, 0x15, 0x17, 0x19, 0x1b, 0x1d, 0x1f, 0x21, 0x23, \r
+ 0x25, 0x27, 0x2a, 0x2c, 0x2e, 0x31, 0x33, 0x36, 0x38, 0x3b, 0x3e, 0x40, 0x43, 0x46, 0x49, 0x4c, \r
+ 0x4f, 0x51, 0x54, 0x57, 0x5a, 0x5d, 0x60, 0x63, 0x67, 0x6a, 0x6d, 0x70, 0x73, 0x76, 0x79, 0x7c\r
+};\r
+\r
+struct\r
+{\r
+ uint8_t Pitch;\r
+ uint8_t Velocity;\r
+ \r
+ uint8_t CurrentPos;\r
+ uint8_t ElapsedTicks;\r
+} ChannelStates[10];\r
+\r
+/** Main program entry point. This routine contains the overall program flow, including initial\r
+ * setup of all components and the main program loop.\r
+ */\r
+int main(void)\r
+{\r
+ SetupHardware();\r
+\r
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
+ \r
+ for (;;)\r
+ {\r
+ MIDI_EventPacket_t ReceivedMIDIEvent;\r
+ if (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent))\r
+ {\r
+ if (ReceivedMIDIEvent.Command == (MIDI_COMMAND_NOTE_ON >> 4))\r
+ {\r
+ ChannelStates[ReceivedMIDIEvent.Data1 & 0x0F].Pitch = ReceivedMIDIEvent.Data2;\r
+ ChannelStates[ReceivedMIDIEvent.Data1 & 0x0F].Velocity = ReceivedMIDIEvent.Data3;\r
+\r
+ LEDs_SetAllLEDs(LEDS_LED1);\r
+ }\r
+ else if (ReceivedMIDIEvent.Command == (MIDI_COMMAND_NOTE_OFF >> 4))\r
+ {\r
+ ChannelStates[ReceivedMIDIEvent.Data1 & 0x0F].Velocity = 0;\r
+ \r
+ LEDs_SetAllLEDs(LEDS_NO_LEDS);\r
+ }\r
+ }\r
+\r
+ /* Check if the sample reload timer period has elapsed, and that the USB bus is ready for a new sample */\r
+ if (TIFR0 & (1 << OCF0A))\r
+ {\r
+ /* Clear the sample reload timer */\r
+ TIFR0 |= (1 << OCF0A);\r
+\r
+ uint8_t OutputSample = 0;\r
+ \r
+ /* Loop through the channels (excluding percussion channel 10) and generate next sample */\r
+ for (uint8_t Channel = 0; Channel < 9; Channel++)\r
+ {\r
+ /* Channel only contributes if it is not muted */\r
+ if (ChannelStates[Channel].Velocity)\r
+ {\r
+ /* Fetch the current sample from the sine lookup table */\r
+ uint8_t TableValue = pgm_read_byte(&SineTable[ChannelStates[Channel].CurrentPos]);\r
+ \r
+ /* Scale sample value by the velocity of the channel */\r
+ TableValue = ((uint16_t)TableValue << 6) / ChannelStates[Channel].Velocity;\r
+ \r
+ /* Add the sample to the output waveform */\r
+ OutputSample += TableValue;\r
+ }\r
+ \r
+ /* Calculate next sample table position for this channel */\r
+ ChannelStates[Channel].CurrentPos += ChannelStates[Channel].Pitch;\r
+ }\r
+ \r
+ /* Output the sample to the PWM timer */\r
+ OCR3A = OutputSample;\r
+ }\r
+ \r
+ MIDI_Device_USBTask(&Keyboard_MIDI_Interface);\r
+ USB_USBTask();\r
+ }\r
+}\r
+\r
+/** Configures the board hardware and chip peripherals for the demo's functionality. */\r
+void SetupHardware(void)\r
+{\r
+ /* Disable watchdog if enabled by bootloader/fuses */\r
+ MCUSR &= ~(1 << WDRF);\r
+ wdt_disable();\r
+\r
+ /* Disable clock division */\r
+ clock_prescale_set(clock_div_1);\r
+ \r
+ /* Hardware Initialization */\r
+ LEDs_Init();\r
+ USB_Init();\r
+\r
+ /* Sample reload timer initialization */\r
+ OCR0A = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;\r
+ TCCR0A = (1 << WGM01); // CTC mode\r
+ TCCR0B = (1 << CS01); // Fcpu/8 speed\r
+\r
+ /* PWM speaker timer initialization */\r
+ TCCR3A = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)); // Set on match, clear on TOP\r
+ TCCR3B = ((1 << WGM32) | (1 << CS30)); // Fast 8-Bit PWM, Fcpu speed\r
+}\r
+\r
+/** Event handler for the library USB Connection event. */\r
+void EVENT_USB_Device_Connect(void)\r
+{\r
+ LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
+\r
+ /* Set speaker as output */\r
+ DDRC |= (1 << 6);\r
+}\r
+\r
+/** Event handler for the library USB Disconnection event. */\r
+void EVENT_USB_Device_Disconnect(void)\r
+{\r
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
+\r
+ /* Set speaker as input to reduce current draw */\r
+ DDRC &= ~(1 << 6);\r
+}\r
+\r
+/** Event handler for the library USB Configuration Changed event. */\r
+void EVENT_USB_Device_ConfigurationChanged(void)\r
+{\r
+ LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
+ \r
+ if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))\r
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
+}\r
+\r
+/** Event handler for the library USB Unhandled Control Request event. */\r
+void EVENT_USB_Device_UnhandledControlRequest(void)\r
+{\r
+ MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);\r
+}\r
projects / pub / lufa.git / blobdiff