IAD support

demos/device/device_os_none/tusb_descriptors.c

@@ -135,18 +135,19 @@ tusb_descriptor_device_t app_tusb_desc_device =
     .bDescriptorType    = TUSB_DESC_TYPE_DEVICE,
     .bcdUSB             = 0x0200,
   #if IAD_DESC_REQUIRED
-  /* Multiple Interfaces Using Interface Association Descriptor (IAD) */
-  .bDeviceClass       = TUSB_CLASS_MISC,
-  .bDeviceSubClass    = TUSB_CLASS_CDC,
-  .bDeviceProtocol    = 1,
+    // Multiple Interfaces Using Interface Association Descriptor (IAD)
+    // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
+    .bDeviceClass       = TUSB_CLASS_MISC,
+    .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
+    .bDeviceProtocol    = MISC_PROTOCOL_IAD,
   #elif TUSB_CFG_DEVICE_CDC
-  .bDeviceClass       = TUSB_CLASS_CDC,
-  .bDeviceSubClass    = 0x00,
-  .bDeviceProtocol    = 0x00,
+    .bDeviceClass       = TUSB_CLASS_CDC,
+    .bDeviceSubClass    = 0x00,
+    .bDeviceProtocol    = 0x00,
   #else
-  .bDeviceClass       = 0x00,
-  .bDeviceSubClass    = 0x00,
-  .bDeviceProtocol    = 0x00,
+    .bDeviceClass       = 0x00,
+    .bDeviceSubClass    = 0x00,
+    .bDeviceProtocol    = 0x00,
   #endif
 
     .bMaxPacketSize0    = TUSB_CFG_DEVICE_CONTROL_ENDOINT_SIZE,
@@ -186,13 +187,12 @@ app_descriptor_configuration_t app_tusb_desc_configuration =
         .bLength           = sizeof(tusb_descriptor_interface_association_t),
         .bDescriptorType   = TUSB_DESC_TYPE_INTERFACE_ASSOCIATION,
 
-        .bFirstInterface   = 1,
+        .bFirstInterface   = INTERFACE_INDEX_CDC,
         .bInterfaceCount   = 2,
 
         .bFunctionClass    = TUSB_CLASS_CDC,
         .bFunctionSubClass = CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL,
         .bFunctionProtocol = CDC_COMM_PROTOCOL_ATCOMMAND,
-
         .iFunction         = 0
     },
     #endif

demos/device/device_os_none/tusb_descriptors.h

@@ -73,7 +73,7 @@
 #define MSC_EDPT_OUT  ENDPOINT_OUT_LOGICAL_TO_PHYSICAL(3)
 
 // Interface Assosication Descriptor if device is CDC + other class
-#define IAD_DESC_REQUIRED ( 0 && TUSB_CFG_DEVICE_CDC && (TOTAL_INTEFACES > 2) )
+#define IAD_DESC_REQUIRED ( TUSB_CFG_DEVICE_CDC && (TOTAL_INTEFACES > 2) )
 
 
 // each combination of interfaces need to have different productid, as windows will bind & remember device driver after the

tinyusb/common/tusb_types.h

@@ -151,6 +151,14 @@ typedef enum {
   TUSB_CLASS_VENDOR_SPECIFIC      = 0xFF
 }tusb_std_class_code_t;
 
+typedef enum {
+  MISC_SUBCLASS_COMMON = 2
+}misc_subclass_type_t;
+
+typedef enum {
+  MISC_PROTOCOL_IAD = 1
+}misc_protocol_type_t;
+
 typedef enum tusb_std_class_flag_{
   TUSB_CLASS_FLAG_AUDIO                = BIT_(TUSB_CLASS_AUDIO)               , ///< 1
   TUSB_CLASS_FLAG_CDC                  = BIT_(TUSB_CLASS_CDC)                 , ///< 2

tinyusb/device/dcd_lpc_11uxx_13uxx.c

@@ -392,14 +392,7 @@ bool dcd_pipe_is_busy(endpoint_handle_t edpt_hdl)
   return dcd_data.qhd[edpt_hdl.index][0].active || dcd_data.qhd[edpt_hdl.index][1].active;
 }
 
-//// add only, controller virtually cannot know
-//static tusb_error_t pipe_add_xfer(endpoint_handle_t edpt_hdl, void * buffer, uint16_t total_bytes, bool int_on_complete)
-//{
-//
-//
-//  return TUSB_ERROR_NONE;
-//}
-
+// add only, not actually xfer data yet
 tusb_error_t dcd_pipe_queue_xfer(endpoint_handle_t edpt_hdl, void * buffer, uint16_t total_bytes)
 {
   ASSERT( !dcd_pipe_is_busy(edpt_hdl), TUSB_ERROR_INTERFACE_IS_BUSY); // endpoint must not in transferring
@@ -417,7 +410,6 @@ tusb_error_t  dcd_pipe_xfer(endpoint_handle_t edpt_hdl, void* buffer, uint16_t t
 {
   ASSERT( !dcd_pipe_is_busy(edpt_hdl), TUSB_ERROR_INTERFACE_IS_BUSY); // endpoint must not in transferring
 
-
   // In case both Buffers (0 & 1) have xfer and only buffer1 has int_on_complete, enable interrupt will also cause buffer0's
   // xfer completion assert interrupt. This is unintentional side effect, and only can be handled in dcd_isr
   LPC_USB->INTEN   = int_on_complete ? BIT_SET_(LPC_USB->INTEN, edpt_hdl.index) : BIT_CLR_(LPC_USB->INTEN, edpt_hdl.index);

tinyusb/device/usbd.c

@@ -304,23 +304,29 @@ tusb_error_t usbd_set_configure_received(uint8_t coreid, uint8_t config_number)
 
   while( p_desc < p_desc_configure + ((tusb_descriptor_configuration_t*)p_desc_configure)->wTotalLength )
   {
-    ASSERT( TUSB_DESC_TYPE_INTERFACE == p_desc[DESCRIPTOR_OFFSET_TYPE], TUSB_ERROR_NOT_SUPPORTED_YET );
+    if ( TUSB_DESC_TYPE_INTERFACE_ASSOCIATION == p_desc[DESCRIPTOR_OFFSET_TYPE])
+    {
+      p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // ignore IAD
+    }else
+    {
+      ASSERT( TUSB_DESC_TYPE_INTERFACE == p_desc[DESCRIPTOR_OFFSET_TYPE], TUSB_ERROR_NOT_SUPPORTED_YET );
 
-    uint8_t class_index;
-    tusb_descriptor_interface_t* p_desc_interface = (tusb_descriptor_interface_t*) p_desc;
+      uint8_t class_index;
+      tusb_descriptor_interface_t* p_desc_interface = (tusb_descriptor_interface_t*) p_desc;
 
-    class_index = p_desc_interface->bInterfaceClass;
+      class_index = p_desc_interface->bInterfaceClass;
 
-    ASSERT( class_index != 0 && usbd_class_drivers[class_index].open != NULL, TUSB_ERROR_NOT_SUPPORTED_YET );
-    ASSERT( 0 == usbd_devices[coreid].interface2class[p_desc_interface->bInterfaceNumber], TUSB_ERROR_FAILED); // duplicate interface number TODO alternate setting
+      ASSERT( class_index != 0 && usbd_class_drivers[class_index].open != NULL, TUSB_ERROR_NOT_SUPPORTED_YET );
+      ASSERT( 0 == usbd_devices[coreid].interface2class[p_desc_interface->bInterfaceNumber], TUSB_ERROR_FAILED); // duplicate interface number TODO alternate setting
 
-    usbd_devices[coreid].interface2class[p_desc_interface->bInterfaceNumber] = class_index;
+      usbd_devices[coreid].interface2class[p_desc_interface->bInterfaceNumber] = class_index;
 
-    uint16_t length=0;
-    ASSERT_STATUS( usbd_class_drivers[class_index].open( coreid, p_desc_interface, &length ) );
+      uint16_t length=0;
+      ASSERT_STATUS( usbd_class_drivers[class_index].open( coreid, p_desc_interface, &length ) );
 
-    ASSERT( length >= sizeof(tusb_descriptor_interface_t), TUSB_ERROR_FAILED );
-    p_desc += length;
+      ASSERT( length >= sizeof(tusb_descriptor_interface_t), TUSB_ERROR_FAILED );
+      p_desc += length;
+    }
   }
 
   return TUSB_ERROR_NONE;