added example which combines USB CDC and MIDI

2 files changed, 257 insertions, 0 deletions

diff --git a/usb-cdc-midi/Makefile b/usb-cdc-midi/Makefile
new file mode 100644
index 0000000..c33bd67
--- /dev/null
+++ b/usb-cdc-midi/Makefile
@@ -0,0 +1,45 @@
+##
+##  spreadspace avr utils
+##
+##
+##  Copyright (C) 2013-2015 Christian Pointner <equinox@spreadspace.org>
+##
+##  This file is part of spreadspace avr utils.
+##
+##  spreadspace avr utils is free software: you can redistribute it and/or modify
+##  it under the terms of the GNU General Public License as published by
+##  the Free Software Foundation, either version 3 of the License, or
+##  any later version.
+##
+##  spreadspace avr utils is distributed in the hope that it will be useful,
+##  but WITHOUT ANY WARRANTY; without even the implied warranty of
+##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+##  GNU General Public License for more details.
+##
+##  You should have received a copy of the GNU General Public License
+##  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+##
+
+NAME := usb-cdc-midi
+BOARD_TYPE := teensy2
+OBJ := $(NAME).o
+LIBS := util led lufa-descriptor-usbserialmidi
+EXTERNAL_LIBS := lufa
+SPREADAVR_PATH := ..
+
+LUFA_PATH := $(SPREADAVR_PATH)/contrib/lufa-LUFA-140928
+LUFA_OPTS  = -D USB_DEVICE_ONLY
+LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR=0
+LUFA_OPTS += -D ORDERED_EP_CONFIG
+LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
+LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
+LUFA_OPTS += -D USE_FLASH_DESCRIPTORS
+LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
+LUFA_OPTS += -D INTERRUPT_CONTROL_ENDPOINT
+
+LUFA_OPTS += -D USB_MANUFACTURER="L\"equinox\""
+LUFA_OPTS += -D USB_PRODUCT="L\"spreadspace usb-cdc & midi example\""
+
+LUFA_COMPONENTS := USB USBCLASS SERIAL
+
+include $(SPREADAVR_PATH)/include.mk
diff --git a/usb-cdc-midi/usb-cdc-midi.c b/usb-cdc-midi/usb-cdc-midi.c
new file mode 100644
index 0000000..8658df8
--- /dev/null
+++ b/usb-cdc-midi/usb-cdc-midi.c
@@ -0,0 +1,212 @@
+/*
+ *  spreadspace avr utils
+ *
+ *
+ *  Copyright (C) 2013-2015 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of spreadspace avr utils.
+ *
+ *  spreadspace avr utils is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  spreadspace avr utils is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <avr/power.h>
+#include <stdio.h>
+
+#include "serialio.h"
+#include "led.h"
+
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2014.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+#include <LUFA/Version.h>
+#include <LUFA/Drivers/USB/USB.h>
+#include "lufa-descriptor-usbserialmidi.h"
+
+USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
+  {
+    .Config =
+      {
+        .ControlInterfaceNumber         = INTERFACE_ID_CDC_CCI,
+        .DataINEndpoint                 =
+          {
+            .Address                = CDC_TX_EPADDR,
+            .Size                   = CDC_TXRX_EPSIZE,
+            .Banks                  = 1,
+          },
+        .DataOUTEndpoint                =
+          {
+            .Address                = CDC_RX_EPADDR,
+            .Size                   = CDC_TXRX_EPSIZE,
+            .Banks                  = 1,
+          },
+        .NotificationEndpoint           =
+          {
+            .Address                = CDC_NOTIFICATION_EPADDR,
+            .Size                   = CDC_NOTIFICATION_EPSIZE,
+            .Banks                  = 1,
+          },
+      },
+  };
+
+
+USB_ClassInfo_MIDI_Device_t Keyboard_MIDI_Interface =
+	{
+		.Config =
+			{
+				.StreamingInterfaceNumber = INTERFACE_ID_AudioStream,
+				.DataINEndpoint           =
+					{
+						.Address          = MIDI_STREAM_IN_EPADDR,
+						.Size             = MIDI_STREAM_EPSIZE,
+						.Banks            = 1,
+					},
+				.DataOUTEndpoint          =
+					{
+						.Address          = MIDI_STREAM_OUT_EPADDR,
+						.Size             = MIDI_STREAM_EPSIZE,
+						.Banks            = 1,
+					},
+			},
+	};
+
+
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+  CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+  MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface);
+}
+
+void EVENT_USB_Device_ControlRequest(void)
+{
+  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+  MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
+}
+/* end LUFA CDC-ACM MIDI specific definitions*/
+
+#include "util.h"
+#include "led.h"
+
+static FILE usb_stream;
+
+#define KEY_PIN PINB
+#define KEY_PORT PORTB
+#define KEY_DDR DDRB
+#define KEY_BIT 0
+
+#define KEY_LP_MAX 255
+
+void key_init(void)
+{
+  KEY_DDR = (1<<KEY_BIT);
+  KEY_PORT = (1<<KEY_BIT);
+}
+
+void handle_cmd(uint8_t cmd)
+{
+  switch(cmd) {
+  case '0': led_off(); break;
+  case '1': led_on(); break;
+  case 't': led_toggle(); break;
+  case 'r': reset2bootloader(); break;
+  default: printf("error\r\n"); return;
+  }
+  printf("ok\r\n");
+}
+
+int main(void)
+{
+  MCUSR &= ~(1 << WDRF);
+  wdt_disable();
+
+  cpu_init();
+  led_init();
+  key_init();
+  USB_Init();
+  sei();
+
+  CDC_Device_CreateStream(&VirtualSerial_CDC_Interface,&usb_stream);
+  stdin = stdout = stderr = &usb_stream;
+
+  MIDI_EventPacket_t MIDIEventOn = (MIDI_EventPacket_t)
+    {
+      .Event       = MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON),
+      .Data1       = MIDI_COMMAND_NOTE_ON | 0,
+      .Data2       = 0,
+      .Data3       = 0x7F,
+    };
+  MIDI_EventPacket_t MIDIEventOff = (MIDI_EventPacket_t)
+    {
+      .Event       = MIDI_EVENT(0, MIDI_COMMAND_NOTE_OFF),
+      .Data1       = MIDI_COMMAND_NOTE_OFF | 0,
+      .Data2       = 0,
+      .Data3       = 0,
+    };
+
+  static uint8_t last_state = (1<<KEY_BIT);
+  static uint8_t lp_cnt = 0;
+  for(;;) {
+    int16_t BytesReceived = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
+    while(BytesReceived > 0) {
+      int ReceivedByte = fgetc(stdin);
+      if(ReceivedByte != EOF) {
+        handle_cmd(ReceivedByte);
+      }
+      BytesReceived--;
+    }
+
+    MIDI_EventPacket_t ReceivedMIDIEvent;
+    while(MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent)) {
+      led_on();
+      printf("MIDI: %02X %02X %02X\r\n", ReceivedMIDIEvent.Data1, ReceivedMIDIEvent.Data2, ReceivedMIDIEvent.Data3);
+      led_off();
+    }
+
+    uint8_t state = KEY_PIN & (1<<KEY_BIT);
+    if(state != last_state)
+      lp_cnt++;
+    else
+      lp_cnt += lp_cnt ? -1 : 0;
+
+    if(lp_cnt >= KEY_LP_MAX) {
+      MIDI_EventPacket_t* MIDIEvent = state ? &MIDIEventOff : &MIDIEventOn;
+      MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, MIDIEvent);
+      MIDI_Device_Flush(&Keyboard_MIDI_Interface);
+
+      printf("Key %s\r\n", state ? "released" : "pressed");
+
+      last_state = state;
+      lp_cnt = 0;
+    }
+
+
+#if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
+    if(USB_DeviceState == DEVICE_STATE_Unattached && USB_VBUS_GetStatus()) {
+      USB_Disable();
+      USB_Init();
+    }
+#endif
+
+    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+    MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
+    USB_USBTask();
+  }
+}