3 files changed, 39 insertions, 6 deletions
diff --git a/tinyusb/class/cdc_host.c b/tinyusb/class/cdc_host.c
index ce1f67e20..1520656fe 100644
--- a/tinyusb/class/cdc_host.c
+++ b/tinyusb/class/cdc_host.c
@@ -57,18 +57,51 @@
 //--------------------------------------------------------------------+
 /*STATIC_*/ cdch_data_t cdch_data[TUSB_CFG_HOST_DEVICE_MAX];
 
+STATIC_ INLINE_ bool tusbh_cdc_is_mounted(uint8_t dev_addr) ATTR_PURE ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+STATIC_ INLINE_ bool tusbh_cdc_is_mounted(uint8_t dev_addr)
+{
+  return (tusbh_device_get_mounted_class_flag(dev_addr) & BIT_(TUSB_CLASS_CDC)) != 0;
+}
+
 //--------------------------------------------------------------------+
 // APPLICATION API (parameter validation needed)
 //--------------------------------------------------------------------+
 bool tusbh_cdc_serial_is_mounted(uint8_t dev_addr)
 {
   // TODO consider all AT Command as serial candidate
-  return
-      (tusbh_device_get_mounted_class_flag(dev_addr) & BIT_(TUSB_CLASS_CDC) )   &&
+  return tusbh_cdc_is_mounted(dev_addr)                                         &&
       (CDC_COMM_PROTOCOL_ATCOMMAND <= cdch_data[dev_addr-1].interface_protocol) &&
       (cdch_data[dev_addr-1].interface_protocol <= CDC_COMM_PROTOCOL_ATCOMMAND_CDMA);
 }
 
+tusb_error_t tusbh_cdc_send(uint8_t dev_addr, void const * p_data, uint32_t length, bool is_notify)
+{
+  ASSERT( tusbh_cdc_is_mounted(dev_addr),  TUSB_ERROR_CDCH_DEVICE_NOT_MOUNTED);
+  ASSERT( p_data != NULL && length, TUSB_ERROR_INVALID_PARA);
+
+  pipe_handle_t pipe_out = cdch_data[dev_addr-1].pipe_out;
+  if ( !hcd_pipe_is_idle(pipe_out) )
+  {
+    return TUSB_ERROR_INTERFACE_IS_BUSY;
+  }
+
+  return hcd_pipe_xfer( pipe_out, (void *) p_data, length, is_notify);
+}
+
+tusb_error_t tusbh_cdc_receive(uint8_t dev_addr, void * p_buffer, uint32_t length, bool is_notify)
+{
+  ASSERT( tusbh_cdc_is_mounted(dev_addr),  TUSB_ERROR_CDCH_DEVICE_NOT_MOUNTED);
+  ASSERT( p_buffer != NULL && length, TUSB_ERROR_INVALID_PARA);
+
+  pipe_handle_t pipe_in = cdch_data[dev_addr-1].pipe_in;
+  if ( !hcd_pipe_is_idle(pipe_in) )
+  {
+    return TUSB_ERROR_INTERFACE_IS_BUSY;
+  }
+
+  return hcd_pipe_xfer( pipe_in, p_buffer, length, is_notify);
+}
+
 //--------------------------------------------------------------------+
 // USBH-CLASS DRIVER API
 //--------------------------------------------------------------------+
diff --git a/tinyusb/class/cdc_host.h b/tinyusb/class/cdc_host.h
index 2b39a6fd7..fde2e2e11 100644
--- a/tinyusb/class/cdc_host.h
+++ b/tinyusb/class/cdc_host.h
@@ -57,12 +57,12 @@
 //--------------------------------------------------------------------+
 // APPLICATION PUBLIC API
 //--------------------------------------------------------------------+
-//bool tusbh_cdc_acm_is_mounted(uint8_t dev_addr) ATTR_PURE ATTR_WARN_UNUSED_RESULT;
 bool tusbh_cdc_serial_is_mounted(uint8_t dev_addr) ATTR_PURE ATTR_WARN_UNUSED_RESULT;
 bool tusbh_cdc_rndis_is_mounted(uint8_t dev_addr) ATTR_PURE ATTR_WARN_UNUSED_RESULT;
 
-tusb_interface_status_t tusbh_cdc_send(void const * p_data, uint32_t length, bool is_notify);
-
+void tusbh_cdc_isr(uint8_t dev_addr, tusb_event_t event) ATTR_WEAK;
+tusb_error_t tusbh_cdc_send(uint8_t dev_addr, void const * p_data, uint32_t length, bool is_notify);
+tusb_error_t tusbh_cdc_receive(uint8_t dev_addr, void * p_buffer, uint32_t length, bool is_notify);
 //--------------------------------------------------------------------+
 // USBH-CLASS API
 //--------------------------------------------------------------------+
diff --git a/tinyusb/class/custom_class.h b/tinyusb/class/custom_class.h
index 1d226d489..9bc4046fe 100644
--- a/tinyusb/class/custom_class.h
+++ b/tinyusb/class/custom_class.h
@@ -61,7 +61,7 @@ typedef struct {
 //--------------------------------------------------------------------+
 // USBH-CLASS DRIVER API
 //--------------------------------------------------------------------+
-STATIC_ INLINE_ bool tusbh_custom_is_mounted(uint8_t dev_addr, uint16_t vendor_id, uint16_t product_id);
+STATIC_ INLINE_ bool tusbh_custom_is_mounted(uint8_t dev_addr, uint16_t vendor_id, uint16_t product_id) ATTR_PURE ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 STATIC_ INLINE_ bool tusbh_custom_is_mounted(uint8_t dev_addr, uint16_t vendor_id, uint16_t product_id)
 {
   (void) vendor_id; // TODO check this later