Sinan Divarci
max4146x_comp
Diff: USBDevice/USBMIDI/USBMIDI.cpp
- Revision:
- 0:0061165683ee
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/USBDevice/USBMIDI/USBMIDI.cpp Sun Oct 25 20:10:02 2020 +0000
@@ -0,0 +1,207 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* 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.
+*/
+
+#include "stdint.h"
+#include "USBMIDI.h"
+
+
+USBMIDI::USBMIDI(uint16_t vendor_id, uint16_t product_id, uint16_t product_release)
+ : USBDevice(vendor_id, product_id, product_release), cur_data(0), data_end(true)
+{
+ midi_evt = NULL;
+ USBDevice::connect();
+}
+
+// write plain MIDIMessage that will be converted to USBMidi event packet
+void USBMIDI::write(MIDIMessage m) {
+ // first byte keeped for retro-compatibility
+ for(int p=1; p < m.length; p+=3) {
+ uint8_t buf[4];
+ // Midi message to USBMidi event packet
+ buf[0]=m.data[1] >> 4;
+ // SysEx
+ if(buf[0] == 0xF) {
+ if((m.length - p) > 3) {
+ // SysEx start or continue
+ buf[0]=0x4;
+ } else {
+ switch(m.length - p) {
+ case 1:
+ // SysEx end with one byte
+ buf[0]=0x5;
+ break;
+ case 2:
+ // SysEx end with two bytes
+ buf[0]=0x6;
+ break;
+ case 3:
+ // SysEx end with three bytes
+ buf[0]=0x7;
+ break;
+ }
+ }
+ }
+ buf[1]=m.data[p];
+
+ if(p+1 < m.length)
+ buf[2]=m.data[p+1];
+ else
+ buf[2]=0;
+
+ if(p+2 < m.length)
+ buf[3]=m.data[p+2];
+ else
+ buf[3]=0;
+
+ USBDevice::write(EPBULK_IN, buf, 4, MAX_PACKET_SIZE_EPBULK);
+ }
+}
+
+
+void USBMIDI::attach(void (*fptr)(MIDIMessage)) {
+ midi_evt = fptr;
+}
+
+bool USBMIDI::EPBULK_OUT_callback() {
+ uint8_t buf[64];
+ uint32_t len;
+ readEP(EPBULK_OUT, buf, &len, 64);
+
+ if (midi_evt != NULL) {
+ for (uint32_t i=0; i<len; i+=4) {
+ uint8_t data_read;
+ data_end=true;
+ switch(buf[i]) {
+ case 0x2:
+ // Two-bytes System Common Message - undefined in USBMidi 1.0
+ data_read=2;
+ break;
+ case 0x4:
+ // SysEx start or continue
+ data_end=false;
+ data_read=3;
+ break;
+ case 0x5:
+ // Single-byte System Common Message or SysEx end with one byte
+ data_read=1;
+ break;
+ case 0x6:
+ // SysEx end with two bytes
+ data_read=2;
+ break;
+ case 0xC:
+ // Program change
+ data_read=2;
+ break;
+ case 0xD:
+ // Channel pressure
+ data_read=2;
+ break;
+ case 0xF:
+ // Single byte
+ data_read=1;
+ break;
+ default:
+ // Others three-bytes messages
+ data_read=3;
+ break;
+ }
+
+ for(uint8_t j=1;j<data_read+1;j++) {
+ data[cur_data]=buf[i+j];
+ cur_data++;
+ }
+
+ if(data_end) {
+ midi_evt(MIDIMessage(data,cur_data));
+ cur_data=0;
+ }
+ }
+ }
+
+ // We reactivate the endpoint to receive next characters
+ readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
+ return true;
+}
+
+// Called in ISR context
+// Set configuration. Return false if the
+// configuration is not supported.
+bool USBMIDI::USBCallback_setConfiguration(uint8_t configuration) {
+ if (configuration != DEFAULT_CONFIGURATION) {
+ return false;
+ }
+
+ // Configure endpoints > 0
+ addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
+ addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
+
+ // We activate the endpoint to be able to receive data
+ readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
+ return true;
+}
+
+
+uint8_t * USBMIDI::stringIinterfaceDesc() {
+ static uint8_t stringIinterfaceDescriptor[] = {
+ 0x0c, //bLength
+ STRING_DESCRIPTOR, //bDescriptorType 0x03
+ 'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio
+ };
+ return stringIinterfaceDescriptor;
+}
+
+uint8_t * USBMIDI::stringIproductDesc() {
+ static uint8_t stringIproductDescriptor[] = {
+ 0x16, //bLength
+ STRING_DESCRIPTOR, //bDescriptorType 0x03
+ 'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio
+ };
+ return stringIproductDescriptor;
+}
+
+
+uint8_t * USBMIDI::configurationDesc() {
+ static uint8_t configDescriptor[] = {
+ // configuration descriptor
+ 0x09, 0x02, 0x65, 0x00, 0x02, 0x01, 0x00, 0xc0, 0x50,
+
+ // The Audio Interface Collection
+ 0x09, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, // Standard AC Interface Descriptor
+ 0x09, 0x24, 0x01, 0x00, 0x01, 0x09, 0x00, 0x01, 0x01, // Class-specific AC Interface Descriptor
+ 0x09, 0x04, 0x01, 0x00, 0x02, 0x01, 0x03, 0x00, 0x00, // MIDIStreaming Interface Descriptors
+ 0x07, 0x24, 0x01, 0x00, 0x01, 0x41, 0x00, // Class-Specific MS Interface Header Descriptor
+
+ // MIDI IN JACKS
+ 0x06, 0x24, 0x02, 0x01, 0x01, 0x00,
+ 0x06, 0x24, 0x02, 0x02, 0x02, 0x00,
+
+ // MIDI OUT JACKS
+ 0x09, 0x24, 0x03, 0x01, 0x03, 0x01, 0x02, 0x01, 0x00,
+ 0x09, 0x24, 0x03, 0x02, 0x06, 0x01, 0x01, 0x01, 0x00,
+
+ // OUT endpoint descriptor
+ 0x09, 0x05, 0x02, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
+ 0x05, 0x25, 0x01, 0x01, 0x01,
+
+ // IN endpoint descriptor
+ 0x09, 0x05, 0x82, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
+ 0x05, 0x25, 0x01, 0x01, 0x03,
+ };
+ return configDescriptor;
+}