Added midi usb support

2 files changed, 205 insertions, 0 deletions

diff --git a/wirish/include/wirish/usb_midi.h b/wirish/include/wirish/usb_midi.h
new file mode 100644
index 0000000..3ee1989
--- /dev/null
+++ b/wirish/include/wirish/usb_midi.h
@@ -0,0 +1,66 @@
+/******************************************************************************
+ * 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 Wirish USB MIDI port (MidiUSB).
+ */
+
+#ifndef _WIRISH_USB_MIDI_H_
+#define _WIRISH_USB_MIDI_H_
+
+#include <wirish/Print.h>
+#include <wirish/boards.h>
+
+/**
+ * @brief Virtual serial terminal.
+ */
+class USBMidi : public Print {
+public:
+    USBMidi(void);
+
+    void begin(void);
+    void end(void);
+
+    uint32 available(void);
+
+    uint32 read(void *buf, uint32 len);
+    uint8  read(void);
+
+    void write(uint8);
+    void write(const char *str);
+    void write(const void*, uint32);
+
+    uint8 isConnected();
+    uint8 pending();
+};
+
+#if BOARD_HAVE_MIDIUSB
+extern USBMidi MidiUSB;
+#endif
+
+#endif
+
diff --git a/wirish/usb_midi.cpp b/wirish/usb_midi.cpp
new file mode 100644
index 0000000..5a48efb
--- /dev/null
+++ b/wirish/usb_midi.cpp
@@ -0,0 +1,139 @@
+/******************************************************************************
+ * 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_buffered((const uint8*)buf + txed, len - txed);
+        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