3 files changed, 39 insertions, 0 deletions
diff --git a/src/device/dcd.h b/src/device/dcd.h
index 3a7e6c5df..93170732f 100644
--- a/src/device/dcd.h
+++ b/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
+TU_ATTR_WEAK 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
+TU_ATTR_WEAK bool dcd_edpt_iso_activate(uint8_t rhport,  tusb_desc_endpoint_t const * p_endpoint_desc);
 //--------------------------------------------------------------------+
 // Event API (implemented by stack)
 //--------------------------------------------------------------------+
diff --git a/src/device/usbd.c b/src/device/usbd.c
index 384daccb8..7733cc2e2 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -1382,4 +1382,31 @@ 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(dcd_edpt_iso_alloc);
+  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;
+
+  uint8_t const epnum = tu_edpt_number(desc_ep->bEndpointAddress);
+  uint8_t const dir   = tu_edpt_dir(desc_ep->bEndpointAddress);
+  
+  TU_ASSERT(dcd_edpt_iso_activate);
+  TU_ASSERT(epnum < CFG_TUD_ENDPPOINT_MAX);
+  TU_ASSERT(tu_edpt_validate(desc_ep, (tusb_speed_t) _usbd_dev.speed));
+  
+  _usbd_dev.ep_status[epnum][dir].stalled = false;
+  _usbd_dev.ep_status[epnum][dir].busy = false;
+  _usbd_dev.ep_status[epnum][dir].claimed = false;
+  return dcd_edpt_iso_activate(rhport, desc_ep);
+}
+
 #endif
diff --git a/src/device/usbd_pvt.h b/src/device/usbd_pvt.h
index 6fad46db3..f860ab0a1 100644
--- a/src/device/usbd_pvt.h
+++ b/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)