From 74298f8ca11dc8d3b0359d1d4e124d6494c3eeac Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Fri, 10 Apr 2009 01:15:42 +0200 Subject: * digital/avr/modules/usb: - imported LUFA. --- digital/avr/modules/usb/lufa/Demos/MIDI/MIDI.c | 225 +++++++++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 digital/avr/modules/usb/lufa/Demos/MIDI/MIDI.c (limited to 'digital/avr/modules/usb/lufa/Demos/MIDI/MIDI.c') diff --git a/digital/avr/modules/usb/lufa/Demos/MIDI/MIDI.c b/digital/avr/modules/usb/lufa/Demos/MIDI/MIDI.c new file mode 100644 index 00000000..a9c827a0 --- /dev/null +++ b/digital/avr/modules/usb/lufa/Demos/MIDI/MIDI.c @@ -0,0 +1,225 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2009. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, and distribute this software + and its documentation for any purpose and without fee is hereby + granted, 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 disclaim 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" + +/* Project Tags, for reading out using the ButtLoad project */ +BUTTLOADTAG(ProjName, "LUFA MIDI App"); +BUTTLOADTAG(BuildTime, __TIME__); +BUTTLOADTAG(BuildDate, __DATE__); +BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING); + +/* Scheduler Task List */ +TASK_LIST +{ + { Task: USB_USBTask , TaskStatus: TASK_STOP }, + { Task: USB_MIDI_Task , TaskStatus: TASK_STOP }, +}; + +/** Main program entry point. This routine configures the hardware required by the application, then + * starts the scheduler to run the application tasks. + */ +int main(void) +{ + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable Clock Division */ + SetSystemClockPrescaler(0); + + /* Hardware Initialization */ + Joystick_Init(); + LEDs_Init(); + HWB_Init(); + + /* Indicate USB not ready */ + UpdateStatus(Status_USBNotReady); + + /* Initialize Scheduler so that it can be used */ + Scheduler_Init(); + + /* Initialize USB Subsystem */ + USB_Init(); + + /* Scheduling - routine never returns, so put this last in the main function */ + Scheduler_Start(); +} + +/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */ +EVENT_HANDLER(USB_Connect) +{ + /* Start USB management task */ + Scheduler_SetTaskMode(USB_USBTask, TASK_RUN); + + /* Indicate USB enumerating */ + UpdateStatus(Status_USBEnumerating); +} + +/** 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. + */ +EVENT_HANDLER(USB_Disconnect) +{ + /* Stop running audio and USB management tasks */ + Scheduler_SetTaskMode(USB_MIDI_Task, TASK_STOP); + Scheduler_SetTaskMode(USB_USBTask, TASK_STOP); + + /* Indicate USB not ready */ + UpdateStatus(Status_USBNotReady); +} + +/** 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. + */ +EVENT_HANDLER(USB_ConfigurationChanged) +{ + /* Setup MIDI stream endpoints */ + Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPNUM, EP_TYPE_BULK, + ENDPOINT_DIR_OUT, MIDI_STREAM_EPSIZE, + ENDPOINT_BANK_SINGLE); + + Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPNUM, EP_TYPE_BULK, + ENDPOINT_DIR_IN, MIDI_STREAM_EPSIZE, + ENDPOINT_BANK_SINGLE); + + /* Indicate USB connected and ready */ + UpdateStatus(Status_USBReady); + + /* Start MIDI task */ + Scheduler_SetTaskMode(USB_MIDI_Task, TASK_RUN); +} + +/** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them + * to the host. + */ +TASK(USB_MIDI_Task) +{ + static uint8_t PrevJoystickStatus; + + /* Select the MIDI IN stream */ + Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM); + + /* Check if endpoint is ready to be written to */ + if (Endpoint_ReadWriteAllowed()) + { + /* Get current joystick mask, XOR with previous to detect joystick changes */ + uint8_t JoystickStatus = Joystick_GetStatus(); + uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus); + + /* Get HWB status - if set use channel 10 (percussion), otherwise use channel 1 */ + uint8_t Channel = ((HWB_GetStatus()) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1)); + + if (JoystickChanges & JOY_LEFT) + SendMIDINoteChange(0x3C, (JoystickStatus & JOY_LEFT), 0, Channel); + + if (JoystickChanges & JOY_UP) + SendMIDINoteChange(0x3D, (JoystickStatus & JOY_UP), 0, Channel); + + if (JoystickChanges & JOY_RIGHT) + SendMIDINoteChange(0x3E, (JoystickStatus & JOY_RIGHT), 0, Channel); + + if (JoystickChanges & JOY_DOWN) + SendMIDINoteChange(0x3F, (JoystickStatus & JOY_DOWN), 0, Channel); + + if (JoystickChanges & JOY_PRESS) + SendMIDINoteChange(0x3B, (JoystickStatus & JOY_PRESS), 0, Channel); + + /* Save previous joystick value for next joystick change detection */ + PrevJoystickStatus = JoystickStatus; + } + + /* Select the MIDI OUT stream */ + Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPNUM); + + /* Check if endpoint is ready to be read from, if so discard its (unused) data */ + if (Endpoint_ReadWriteAllowed()) + Endpoint_ClearCurrentBank(); +} + +/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to + * log to a serial port, or anything else that is suitable for status updates. + * + * \param CurrentStatus Current status of the system, from the MIDI_StatusCodes_t enum + */ +void UpdateStatus(uint8_t CurrentStatus) +{ + uint8_t LEDMask = LEDS_NO_LEDS; + + /* Set the LED mask to the appropriate LED mask based on the given status code */ + switch (CurrentStatus) + { + case Status_USBNotReady: + LEDMask = (LEDS_LED1); + break; + case Status_USBEnumerating: + LEDMask = (LEDS_LED1 | LEDS_LED2); + break; + case Status_USBReady: + LEDMask = (LEDS_LED2 | LEDS_LED4); + break; + } + + /* Set the board LEDs to the new LED mask */ + LEDs_SetAllLEDs(LEDMask); +} + +/** Sends a MIDI note change event (note on or off) to the MIDI output jack, on the given virtual cable ID and channel. + * + * \param Pitch Pitch of the note to turn on or off + * \param OnOff Set to true if the note is on (being held down), or false otherwise + * \param CableID ID of the virtual cable to send the note change to + * \param Channel MIDI channel number to send the note change event to + */ +void SendMIDINoteChange(const uint8_t Pitch, const bool OnOff, const uint8_t CableID, const uint8_t Channel) +{ + /* Wait until endpoint ready for more data */ + while (!(Endpoint_ReadWriteAllowed())); + + /* Check if the message should be a Note On or Note Off command */ + uint8_t Command = ((OnOff)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + + /* Write the Packet Header to the endpoint */ + Endpoint_Write_Byte((CableID << 4) | (Command >> 4)); + + /* Write the Note On/Off command with the specified channel, pitch and velocity */ + Endpoint_Write_Byte(Command | Channel); + Endpoint_Write_Byte(Pitch); + Endpoint_Write_Byte(MIDI_STANDARD_VELOCITY); + + /* Send the data in the endpoint to the host */ + Endpoint_ClearCurrentBank(); +} -- cgit v1.2.3