--- /dev/null
+/*\r
+ LUFA Library\r
+ Copyright (C) Dean Camera, 2009.\r
+ \r
+ dean [at] fourwalledcubicle [dot] com\r
+ www.fourwalledcubicle.com\r
+*/\r
+\r
+/*\r
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+ Permission to use, copy, modify, and distribute this software\r
+ and its documentation for any purpose and without fee is hereby\r
+ granted, provided that the above copyright notice appear in all\r
+ 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 input demo. This file contains the main tasks of the demo and\r
+ * is responsible for the initial application hardware configuration.\r
+ */\r
+\r
+#include "MIDI.h"\r
+\r
+/* Project Tags, for reading out using the ButtLoad project */\r
+BUTTLOADTAG(ProjName, "LUFA MIDI App");\r
+BUTTLOADTAG(BuildTime, __TIME__);\r
+BUTTLOADTAG(BuildDate, __DATE__);\r
+BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING);\r
+\r
+/* Scheduler Task List */\r
+TASK_LIST\r
+{\r
+ { Task: USB_USBTask , TaskStatus: TASK_STOP },\r
+ { Task: USB_MIDI_Task , TaskStatus: TASK_STOP },\r
+};\r
+\r
+/** Main program entry point. This routine configures the hardware required by the application, then\r
+ * starts the scheduler to run the application tasks.\r
+ */\r
+int main(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
+ Joystick_Init();\r
+ LEDs_Init();\r
+ HWB_Init();\r
+\r
+ /* Indicate USB not ready */\r
+ UpdateStatus(Status_USBNotReady);\r
+ \r
+ /* Initialize Scheduler so that it can be used */\r
+ Scheduler_Init();\r
+\r
+ /* Initialize USB Subsystem */\r
+ USB_Init();\r
+\r
+ /* Scheduling - routine never returns, so put this last in the main function */\r
+ Scheduler_Start();\r
+}\r
+\r
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */\r
+EVENT_HANDLER(USB_Connect)\r
+{\r
+ /* Start USB management task */\r
+ Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);\r
+\r
+ /* Indicate USB enumerating */\r
+ UpdateStatus(Status_USBEnumerating);\r
+}\r
+\r
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
+ * the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks.\r
+ */\r
+EVENT_HANDLER(USB_Disconnect)\r
+{\r
+ /* Stop running audio and USB management tasks */\r
+ Scheduler_SetTaskMode(USB_MIDI_Task, TASK_STOP);\r
+ Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);\r
+\r
+ /* Indicate USB not ready */\r
+ UpdateStatus(Status_USBNotReady);\r
+}\r
+\r
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
+ * of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.\r
+ */\r
+EVENT_HANDLER(USB_ConfigurationChanged)\r
+{\r
+ /* Setup MIDI stream endpoints */\r
+ Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPNUM, EP_TYPE_BULK,\r
+ ENDPOINT_DIR_OUT, MIDI_STREAM_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE);\r
+\r
+ Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPNUM, EP_TYPE_BULK,\r
+ ENDPOINT_DIR_IN, MIDI_STREAM_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE);\r
+\r
+ /* Indicate USB connected and ready */\r
+ UpdateStatus(Status_USBReady);\r
+\r
+ /* Start MIDI task */\r
+ Scheduler_SetTaskMode(USB_MIDI_Task, TASK_RUN);\r
+}\r
+\r
+/** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them\r
+ * to the host.\r
+ */\r
+TASK(USB_MIDI_Task)\r
+{\r
+ static uint8_t PrevJoystickStatus;\r
+\r
+ /* Select the MIDI IN stream */\r
+ Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM);\r
+\r
+ /* Check if endpoint is ready to be written to */\r
+ if (Endpoint_ReadWriteAllowed())\r
+ {\r
+ /* Get current joystick mask, XOR with previous to detect joystick changes */\r
+ uint8_t JoystickStatus = Joystick_GetStatus();\r
+ uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);\r
+ \r
+ /* Get HWB status - if set use channel 10 (percussion), otherwise use channel 1 */\r
+ uint8_t Channel = ((HWB_GetStatus()) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));\r
+\r
+ if (JoystickChanges & JOY_LEFT)\r
+ SendMIDINoteChange(0x3C, (JoystickStatus & JOY_LEFT), 0, Channel);\r
+\r
+ if (JoystickChanges & JOY_UP)\r
+ SendMIDINoteChange(0x3D, (JoystickStatus & JOY_UP), 0, Channel);\r
+\r
+ if (JoystickChanges & JOY_RIGHT)\r
+ SendMIDINoteChange(0x3E, (JoystickStatus & JOY_RIGHT), 0, Channel);\r
+\r
+ if (JoystickChanges & JOY_DOWN)\r
+ SendMIDINoteChange(0x3F, (JoystickStatus & JOY_DOWN), 0, Channel);\r
+\r
+ if (JoystickChanges & JOY_PRESS)\r
+ SendMIDINoteChange(0x3B, (JoystickStatus & JOY_PRESS), 0, Channel);\r
+\r
+ /* Save previous joystick value for next joystick change detection */\r
+ PrevJoystickStatus = JoystickStatus;\r
+ }\r
+\r
+ /* Select the MIDI OUT stream */\r
+ Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPNUM);\r
+\r
+ /* Check if endpoint is ready to be read from, if so discard its (unused) data */\r
+ if (Endpoint_ReadWriteAllowed())\r
+ Endpoint_ClearCurrentBank();\r
+}\r
+\r
+/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to\r
+ * log to a serial port, or anything else that is suitable for status updates.\r
+ *\r
+ * \param CurrentStatus Current status of the system, from the MIDI_StatusCodes_t enum\r
+ */\r
+void UpdateStatus(uint8_t CurrentStatus)\r
+{\r
+ uint8_t LEDMask = LEDS_NO_LEDS;\r
+ \r
+ /* Set the LED mask to the appropriate LED mask based on the given status code */\r
+ switch (CurrentStatus)\r
+ {\r
+ case Status_USBNotReady:\r
+ LEDMask = (LEDS_LED1);\r
+ break;\r
+ case Status_USBEnumerating:\r
+ LEDMask = (LEDS_LED1 | LEDS_LED2);\r
+ break;\r
+ case Status_USBReady:\r
+ LEDMask = (LEDS_LED2 | LEDS_LED4);\r
+ break;\r
+ }\r
+ \r
+ /* Set the board LEDs to the new LED mask */\r
+ LEDs_SetAllLEDs(LEDMask);\r
+}\r
+\r
+/** Sends a MIDI note change event (note on or off) to the MIDI output jack, on the given virtual cable ID and channel.\r
+ *\r
+ * \param Pitch Pitch of the note to turn on or off\r
+ * \param OnOff Set to true if the note is on (being held down), or false otherwise\r
+ * \param CableID ID of the virtual cable to send the note change to\r
+ * \param Channel MIDI channel number to send the note change event to\r
+ */\r
+void SendMIDINoteChange(const uint8_t Pitch, const bool OnOff, const uint8_t CableID, const uint8_t Channel)\r
+{\r
+ /* Wait until endpoint ready for more data */\r
+ while (!(Endpoint_ReadWriteAllowed()));\r
+\r
+ /* Check if the message should be a Note On or Note Off command */\r
+ uint8_t Command = ((OnOff)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);\r
+\r
+ /* Write the Packet Header to the endpoint */\r
+ Endpoint_Write_Byte((CableID << 4) | (Command >> 4));\r
+\r
+ /* Write the Note On/Off command with the specified channel, pitch and velocity */\r
+ Endpoint_Write_Byte(Command | Channel);\r
+ Endpoint_Write_Byte(Pitch);\r
+ Endpoint_Write_Byte(MIDI_STANDARD_VELOCITY);\r
+ \r
+ /* Send the data in the endpoint to the host */\r
+ Endpoint_ClearCurrentBank();\r
+}\r
projects / pub / lufa.git / blobdiff