Add dcd_edpt_iso_alloc() / dcd_edpt_iso_activate() for ISO EP buffer management.

src/device/dcd.h

@@ -167,6 +167,12 @@ void dcd_edpt_stall           (uint8_t rhport, uint8_t ep_addr);
 // This API never calls with control endpoints, since it is auto cleared when receiving setup packet
 void dcd_edpt_clear_stall     (uint8_t rhport, uint8_t ep_addr);
 
+// Allocate packet buffer used by ISO endpoints
+// Some MCU need manual packet buffer allocation, we allocation largest size to avoid clustering
+bool dcd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet_size);
+
+// Configure and enable an ISO endpoint according to descriptor
+bool dcd_edpt_iso_activate(uint8_t rhport,  tusb_desc_endpoint_t const * p_endpoint_desc);
 //--------------------------------------------------------------------+
 // Event API (implemented by stack)
 //--------------------------------------------------------------------+

src/device/usbd.c

@@ -1380,4 +1380,23 @@ void usbd_sof_enable(uint8_t rhport, bool en)
   dcd_sof_enable(rhport, en);
 }
 
+bool usbd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet_size)
+{
+  rhport = _usbd_rhport;
+
+  TU_ASSERT(tu_edpt_number(ep_addr) < CFG_TUD_ENDPPOINT_MAX);
+
+  return dcd_edpt_iso_alloc(rhport, ep_addr, largest_packet_size);
+}
+
+bool usbd_edpt_iso_activate(uint8_t rhport, tusb_desc_endpoint_t const * desc_ep)
+{
+  rhport = _usbd_rhport;
+
+  TU_ASSERT(tu_edpt_number(desc_ep->bEndpointAddress) < CFG_TUD_ENDPPOINT_MAX);
+  TU_ASSERT(tu_edpt_validate(desc_ep, (tusb_speed_t) _usbd_dev.speed));
+
+  return dcd_edpt_iso_activate(rhport, desc_ep);
+}
+
 #endif

src/device/usbd_pvt.h

@@ -96,6 +96,12 @@ void usbd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr);
 // Check if endpoint is stalled
 bool usbd_edpt_stalled(uint8_t rhport, uint8_t ep_addr);
 
+// Allocate packet buffer used by ISO endpoints
+bool usbd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet_size);
+
+// Configure and enable an ISO endpoint according to descriptor
+bool usbd_edpt_iso_activate(uint8_t rhport,  tusb_desc_endpoint_t const * p_endpoint_desc);
+
 // Check if endpoint is ready (not busy and not stalled)
 TU_ATTR_ALWAYS_INLINE static inline
 bool usbd_edpt_ready(uint8_t rhport, uint8_t ep_addr)