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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
* Copyright (c) 2013 Magnus Lundin.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @brief USB MIDI device
*/
#include <wirish/usb_midi.h>
#include <string.h>
#include <stdint.h>
#include <libmaple/nvic.h>
#include <libmaple/usb_midi_device.h>
#include <libmaple/usb.h>
#include <wirish/wirish.h>
/*
* USBMidi interface
*/
#define USB_TIMEOUT 50
USBMidi::USBMidi(void) {
#if !BOARD_HAVE_MIDIUSB
ASSERT(0);
#endif
}
void USBMidi::begin(void) {
#if BOARD_HAVE_MIDIUSB
usb_midi_enable(BOARD_USB_DISC_DEV, BOARD_USB_DISC_BIT);
#endif
}
void USBMidi::end(void) {
#if BOARD_HAVE_MIDIUSB
usb_midi_disable(BOARD_USB_DISC_DEV, BOARD_USB_DISC_BIT);
#endif
}
void USBMidi::write(uint8 ch) {
this->write(&ch, 1);
}
void USBMidi::write(const char *str) {
this->write(str, strlen(str));
}
void USBMidi::write(const void *buf, uint32 len) {
if (!this->isConnected() || !buf) {
return;
}
uint32 txed = 0;
uint32 old_txed = 0;
uint32 start = millis();
uint32 sent = 0;
while (txed < len && (millis() - start < USB_TIMEOUT)) {
sent = usb_midi_tx((const uint8*)buf + txed, len - txed);
txed += sent;
if (old_txed != txed) {
start = millis();
}
old_txed = txed;
}
if (sent == USB_MIDI_TX_EPSIZE) {
while (usb_midi_is_transmitting() != 0) {
}
/* flush out to avoid having the pc wait for more data */
usb_midi_tx(NULL, 0);
}
}
uint32 USBMidi::available(void) {
return usb_midi_data_available();
}
uint32 USBMidi::read(void *buf, uint32 len) {
if (!buf) {
return 0;
}
uint32 rxed = 0;
while (rxed < len) {
rxed += usb_midi_rx((uint8*)buf + rxed, len - rxed);
}
return rxed;
}
/* Blocks forever until 1 byte is received */
uint8 USBMidi::read(void) {
uint8 b;
this->read(&b, 1);
return b;
}
uint8 USBMidi::pending(void) {
return usb_midi_get_pending();
}
uint8 USBMidi::isConnected(void) {
return usb_is_connected(USBLIB) && usb_is_configured(USBLIB);
}
#if BOARD_HAVE_MIDIUSB
USBMidi MidiUSB;
#endif
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