Diff: usbdevice.c

Revision:

1:ff74eabe02cd

Child:

2:10d694d6ccdc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbdevice.c	Sun Feb 20 13:10:05 2011 +0000
@@ -0,0 +1,181 @@
+/** @license The MIT License
+ * Copyright (c) 2011 mux, simon
+ *
+ * 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 "usbcore.h"
+#include "mbed.h"
+
+#define STANDARD_DEVICE_REQUEST     (0x00)
+#define STANDARD_INTERFACE_REQUEST  (0x01)
+#define STANDARD_ENDPOINT_REQUEST   (0x02)
+#define CLASS_DEVICE_REQUEST        (0x20)
+#define CLASS_INTERFACE_REQUEST     (0x21)
+#define CLASS_ENDPOINT_REQUEST      (0x22)
+#define VENDOR_DEVICE_REQUEST       (0x40)
+#define VENDOR_INTERFACE_REQUEST    (0x41)
+#define VENDOR_ENDPOINT_REQUEST     (0x42)
+#define GET_STATUS                  (0x00)
+#define CLEAR_FEATURE               (0x01)
+#define SET_FEATURE                 (0x03)
+#define SET_ADDRESS                 (0x05)
+#define GET_DESCRIPTOR              (0x06)
+#define SET_DESCRIPTOR              (0x07)
+#define GET_CONFIGURATION           (0x08)
+#define SET_CONFIGURATION           (0x09)
+#define DEVICE_DESCRIPTOR           (0x01)
+#define CONFIG_DESCRIPTOR           (0x02)
+#define STRING_DESCRIPTOR           (0x03)
+#define INTERFACE_DESCRIPTOR        (0x04)
+#define ENDPOINT_DESCRIPTOR         (0x05)
+#define QUALIFIER_DESCRIPTOR        (0x06)
+#define unpack(x) (x & 0xFF),((x >> 8) & 0xFF)
+
+// setup packet
+struct {
+    uint8_t   bmRequestType;
+    uint8_t   bRequest;
+    uint16_t  wValue;
+    uint16_t  wIndex;
+    uint16_t  wLength;
+} __attribute__((packed)) setup = {0};
+
+// data packet
+struct { 
+    uint8_t *data;
+    uint8_t size;
+    uint8_t sent;
+} transfer = {0};
+
+uint8_t device_descriptor[] = {
+    0x12,                       // Descriptor size in bytes (12h)                  
+    DEVICE_DESCRIPTOR,          // The constant DEVICE (01h)                       
+    unpack(0x0200),             // US2B specification release number (BCD)         
+    0x00,                       // Class code                                      
+    0x00,                       // Subclass code                                   
+    0x00,                       // Protocol Code                                   
+    MAX_EP0_PSIZE,              // Maximum packet size for endpoint zero           
+    unpack(0x0763),             // Vendor ID                                       
+    unpack(0x0198),             // Product ID                                      
+    unpack(0x0001),             // Device release number (BCD)                     
+    0x00,                       // Index of string descriptor for the manufacturer 
+    0x00,                       // Index of string descriptor for the product      
+    0x00,                       // Index of string descriptor for the serial number
+    0x01,                       // Number of possible configurations               
+};
+
+uint8_t config_descriptor[]={
+    0x09, 0x02, 0x65, 0x00, 0x02, 0x01, 0x00, 0xc0, 0x50, // configuration descriptor
+    // 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,
+};
+
+void ep0_in();
+
+void data_in_stage(uint8_t *desc, uint8_t length) {
+    transfer.sent = 0;
+    transfer.data = desc;
+    transfer.size = length;
+    ep0_in();
+}
+
+void status_in_stage() {
+    ep_write(EP1, 0, 0); // ZLEP for status stage
+}
+
+void ep0_setup() {
+    ep_read(EP0,(uint8_t*) &setup);
+
+    switch (setup.bmRequestType & 0x7f) { // mask direction
+        case STANDARD_DEVICE_REQUEST:
+            switch (setup.bRequest) {
+                case GET_DESCRIPTOR:
+                    switch ((setup.wValue>>8)) {
+                        case DEVICE_DESCRIPTOR:     // device descriptor request
+                        case QUALIFIER_DESCRIPTOR:  // device qualifier descriptor
+                            data_in_stage(device_descriptor, sizeof(device_descriptor));
+                            break;
+                        case CONFIG_DESCRIPTOR:     // configuration descriptor
+                            data_in_stage(config_descriptor, setup.wLength);
+                            break;
+                        case STRING_DESCRIPTOR:
+                            break;
+                        default:
+                            break;
+                    }
+                    break;
+                case SET_ADDRESS:
+                    usb_set_address((uint8_t) (setup.wValue & 0xFF));
+                    status_in_stage();
+                    break;
+                case SET_CONFIGURATION:
+                    if (!setup.wValue) {
+                        break;
+                    }
+                    ep_realize(EP4, MAX_EPn_PSIZE);
+                    ep_realize(EP5, MAX_EPn_PSIZE);
+                    status_in_stage();
+                    usb_configure(1);
+                    break;
+                default:
+                    break;
+            }
+            break;
+        default:
+            break;
+    }
+}
+
+void ep0_in() {
+    if ((setup.bmRequestType & 0x80) && transfer.size) { // device to host
+        if (transfer.size > MAX_EP0_PSIZE) {
+            transfer.sent = MAX_EP0_PSIZE;
+        } else {
+            transfer.sent = transfer.size;
+        }
+        ep_write(EP1, transfer.data, transfer.sent);
+        transfer.data += transfer.sent;
+        transfer.size -= transfer.sent;
+    }
+}
+
+void ep0_out() {
+    uint8_t buf[64];
+    ep_read(EP0, buf);
+}