add TinyUSB_Device_Task() to API

Author: hathach

src/arduino/Adafruit_TinyUSB_API.cpp

@@ -31,6 +31,8 @@
 //--------------------------------------------------------------------+
 // MACRO TYPEDEF CONSTANT ENUM DECLARATION
 //--------------------------------------------------------------------+
+extern "C"
+{
 
 void TinyUSB_Device_Init(uint8_t rhport)
 {
@@ -39,6 +41,8 @@ void TinyUSB_Device_Init(uint8_t rhport)
 
 void TinyUSB_Device_Task(void)
 {
+  USBDevice.task();
+}
 
 }
 

src/arduino/Adafruit_TinyUSB_API.h

@@ -33,6 +33,9 @@
 // Should be called by BSP Core to initialize, process task
 // Weak function allow compile arduino core before linking with this library
 //--------------------------------------------------------------------+
+#ifdef __cplusplus
+ extern "C" {
+#endif
 
 // Called by core/sketch to initialize usb device hardware and stack
 // This also initialize Serial as CDC device
@@ -41,6 +44,10 @@ void TinyUSB_Device_Init(uint8_t rhport) __attribute__((weak));
 // Called by core/sketch to handle device event
 void TinyUSB_Device_Task(void) __attribute__((weak));
 
+#ifdef __cplusplus
+ }
+#endif
+
 //--------------------------------------------------------------------+
 // Port API
 // Must be implemented by each BSP core/platform

src/arduino/Adafruit_USBD_Device.cpp

@@ -248,6 +248,8 @@ void Adafruit_USBD_Device::task(void)
   tud_task();
 
 #if CFG_TUSB_OS == OPT_OS_NONE || CFG_TUSB_OS == OPT_OS_PICO
+  // flush Serial if we don't use RTOS TODO multiple CDCs
+  tud_cdc_n_write_flush(0);
 #endif
 }
 

src/arduino/ports/Adafruit_TinyUSB_samd.cpp

@@ -52,13 +52,6 @@ void USB_Handler(void) { tud_int_handler(0); }
 
 #endif
 
-// run TinyUSB background task when yield()
-void yield(void)
-{
-  tud_task();
-  tud_cdc_write_flush();
-}
-
 } // extern C