X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/b9b03aadb219d06fbad9d110e508db93e45461af..5de364163f5a7597ba2f54e37cdea493fbd1e7ff:/Demos/Device/LowLevel/MIDI/MIDI.c diff --git a/Demos/Device/LowLevel/MIDI/MIDI.c b/Demos/Device/LowLevel/MIDI/MIDI.c index b6b43df6a..2cdf71152 100644 --- a/Demos/Device/LowLevel/MIDI/MIDI.c +++ b/Demos/Device/LowLevel/MIDI/MIDI.c @@ -36,18 +36,25 @@ #include "MIDI.h" -/* 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. + * enters a loop to run the application tasks in sequence. */ int main(void) { + SetupHardware(); + + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); + + for (;;) + { + MIDI_Task(); + USB_USBTask(); + } +} + +/** Configures the board hardware and chip peripherals for the demo's functionality. */ +void SetupHardware(void) +{ /* Disable watchdog if enabled by bootloader/fuses */ MCUSR &= ~(1 << WDRF); wdt_disable(); @@ -59,78 +66,67 @@ int main(void) Joystick_Init(); LEDs_Init(); Buttons_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. */ -void EVENT_USB_Connect(void) +void EVENT_USB_Device_Connect(void) { - /* Start USB management task */ - Scheduler_SetTaskMode(USB_USBTask, TASK_RUN); - /* Indicate USB enumerating */ - UpdateStatus(Status_USBEnumerating); + 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_Disconnect(void) +void EVENT_USB_Device_Disconnect(void) { - /* 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); + 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_ConfigurationChanged(void) +void EVENT_USB_Device_ConfigurationChanged(void) { - /* 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); + LEDs_SetAllLEDs(LEDMASK_USB_READY); - /* Start MIDI task */ - Scheduler_SetTaskMode(USB_MIDI_Task, TASK_RUN); + /* Setup MIDI stream endpoints */ + if (!(Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPNUM, EP_TYPE_BULK, + ENDPOINT_DIR_OUT, MIDI_STREAM_EPSIZE, + ENDPOINT_BANK_SINGLE))) + { + LEDs_SetAllLEDs(LEDMASK_USB_ERROR); + } + + if (!(Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPNUM, EP_TYPE_BULK, + ENDPOINT_DIR_IN, MIDI_STREAM_EPSIZE, + ENDPOINT_BANK_SINGLE))) + { + LEDs_SetAllLEDs(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. */ -TASK(USB_MIDI_Task) +void MIDI_Task(void) { static uint8_t PrevJoystickStatus; - /* Select the MIDI IN stream */ + /* Device must be connected and configured for the task to run */ + if (USB_DeviceState != DEVICE_STATE_Configured) + return; + Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPNUM); - /* Check if endpoint is ready to be written to */ if (Endpoint_IsINReady()) { - /* Get current joystick mask, XOR with previous to detect joystick changes */ + uint8_t MIDICommand = 0; + uint8_t MIDIPitch; + uint8_t JoystickStatus = Joystick_GetStatus(); uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus); @@ -138,20 +134,55 @@ TASK(USB_MIDI_Task) uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1)); if (JoystickChanges & JOY_LEFT) - SendMIDINoteChange(0x3C, (JoystickStatus & JOY_LEFT), 0, Channel); + { + MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3C; + } if (JoystickChanges & JOY_UP) - SendMIDINoteChange(0x3D, (JoystickStatus & JOY_UP), 0, Channel); + { + MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3D; + } if (JoystickChanges & JOY_RIGHT) - SendMIDINoteChange(0x3E, (JoystickStatus & JOY_RIGHT), 0, Channel); - + { + MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3E; + } + if (JoystickChanges & JOY_DOWN) - SendMIDINoteChange(0x3F, (JoystickStatus & JOY_DOWN), 0, Channel); + { + MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF); + MIDIPitch = 0x3F; + } if (JoystickChanges & JOY_PRESS) - SendMIDINoteChange(0x3B, (JoystickStatus & JOY_PRESS), 0, Channel); - + { + 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) + { + USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t) + { + .CableNumber = 0, + .Command = (MIDICommand >> 4), + + .Data1 = MIDICommand | Channel, + .Data2 = MIDIPitch, + .Data3 = MIDI_STANDARD_VELOCITY, + }; + + /* Write the MIDI event packet to the endpoint */ + Endpoint_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent)); + + /* Send the data in the endpoint to the host */ + Endpoint_ClearIN(); + } + /* Save previous joystick value for next joystick change detection */ PrevJoystickStatus = JoystickStatus; } @@ -159,61 +190,26 @@ TASK(USB_MIDI_Task) /* 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 */ + /* Check if a MIDI command has been received */ if (Endpoint_IsOUTReceived()) - Endpoint_ClearOUT(); -} - -/** 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; - } + USB_MIDI_EventPacket_t MIDIEvent; + + /* Read the MIDI event packet from the endpoint */ + Endpoint_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent)); - /* 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_IsReadWriteAllowed())); - - /* 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); + if (MIDIEvent.Command == (MIDI_COMMAND_NOTE_ON >> 4)) + { + /* 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); + } - /* Send the data in the endpoint to the host */ - Endpoint_ClearIN(); + /* Clear the endpoint ready for new packet */ + Endpoint_ClearOUT(); + } }