add & pass a first few test for cdc host

implement cdch_open_subtask

tinyusb/class/cdc_host.h

@@ -63,6 +63,15 @@
 //--------------------------------------------------------------------+
 #ifdef _TINY_USB_SOURCE_FILE_
 
+typedef struct {
+  uint8_t interface_number;
+  uint8_t interface_protocol;
+  pipe_handle_t pipe_notification, pipe_out, pipe_in;
+
+} cdch_data_t;
+
+extern cdch_data_t cdch_data[TUSB_CFG_HOST_DEVICE_MAX]; // TODO consider to move to cdch internal header file
+
 void         cdch_init(void);
 tusb_error_t cdch_open_subtask(uint8_t dev_addr, tusb_descriptor_interface_t const *p_interface_desc, uint16_t *p_length) ATTR_WARN_UNUSED_RESULT;
 void         cdch_isr(pipe_handle_t pipe_hdl, tusb_event_t event);