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Diffstat (limited to 'Demos/Device/LowLevel/MIDI/MIDI.c')
| -rw-r--r-- | Demos/Device/LowLevel/MIDI/MIDI.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/Demos/Device/LowLevel/MIDI/MIDI.c b/Demos/Device/LowLevel/MIDI/MIDI.c new file mode 100644 index 0000000000..0fdb04597c --- /dev/null +++ b/Demos/Device/LowLevel/MIDI/MIDI.c @@ -0,0 +1,224 @@ +/* + 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 input demo. This file contains the main tasks of the demo and + * is responsible for the initial application hardware configuration. + */ + +#include "MIDI.h" + +/** Main program entry point. This routine configures the hardware required by the application, then + * enters a loop to run the application tasks in sequence. + */ +int main(void) +{ + SetupHardware(); + + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); + GlobalInterruptEnable(); + + for (;;) + { + MIDI_Task(); + USB_USBTask(); + } +} + +/** 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); +#elif (ARCH == ARCH_XMEGA) + /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */ + XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU); + XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL); + + /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */ + XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ); + XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB); + + PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm; +#endif + + /* Hardware Initialization */ + Joystick_Init(); + LEDs_Init(); + Buttons_Init(); + USB_Init(); +} + +/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */ +void EVENT_USB_Device_Connect(void) +{ + /* Indicate USB enumerating */ + LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); +} + +/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via + * the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks. + */ +void EVENT_USB_Device_Disconnect(void) +{ + /* Indicate USB not ready */ + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); +} + +/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration + * of the USB device after enumeration - the device endpoints are configured and the MIDI management task started. + */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ + bool ConfigSuccess = true; + + /* Setup MIDI Data Endpoints */ + ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1); + ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1); + + /* Indicate endpoint configuration success or failure */ + LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); +} + +/** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them + * to the host. + */ +void MIDI_Task(void) +{ + static uint8_t PrevJoystickStatus; + + /* Device must be connected and configured for the task to run */ + if (USB_DeviceState != DEVICE_STATE_Configured) + return; + + Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPADDR); + + if (Endpoint_IsINReady()) + { + uint8_t MIDICommand = 0; + uint8_t MIDIPitch; + + uint8_t JoystickStatus = Joystick_GetStatus(); + uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus); + + /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */ + uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1)); + + if (JoystickChanges & JOY_LEFT) + { + MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3C; + } + + if (JoystickChanges & JOY_UP) + { + MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3D; + } + + if (JoystickChanges & JOY_RIGHT) + { + MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3E; + } + + if (JoystickChanges & JOY_DOWN) + { + MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3F; + } + + if (JoystickChanges & JOY_PRESS) + { + MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3B; + } + + /* Check if a MIDI command is to be sent */ + if (MIDICommand) + { + MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t) + { + .Event = MIDI_EVENT(0, MIDICommand), + + .Data1 = MIDICommand | Channel, + .Data2 = MIDIPitch, + .Data3 = MIDI_STANDARD_VELOCITY, + }; + + /* Write the MIDI event packet to the endpoint */ + Endpoint_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL); + + /* Send the data in the endpoint to the host */ + Endpoint_ClearIN(); + } + + /* Save previous joystick value for next joystick change detection */ + PrevJoystickStatus = JoystickStatus; + } + + /* Select the MIDI OUT stream */ + Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPADDR); + + /* Check if a MIDI command has been received */ + if (Endpoint_IsOUTReceived()) + { + MIDI_EventPacket_t MIDIEvent; + + /* Read the MIDI event packet from the endpoint */ + Endpoint_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL); + + /* Check to see if the sent command is a note on message with a non-zero velocity */ + if ((MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && (MIDIEvent.Data3 > 0)) + { + /* Change LEDs depending on the pitch of the sent note */ + LEDs_SetAllLEDs(MIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2); + } + else + { + /* Turn off all LEDs in response to non Note On messages */ + LEDs_SetAllLEDs(LEDS_NO_LEDS); + } + + /* If the endpoint is now empty, clear the bank */ + if (!(Endpoint_BytesInEndpoint())) + { + /* Clear the endpoint ready for new packet */ + Endpoint_ClearOUT(); + } + } +} + |