change SerialUSB.baud() etc. to return the actual CDC line coding

libraries/USBDevice/inc/usbd_cdc_if.h

@@ -53,6 +53,12 @@ void CDC_deInit(void);
 bool CDC_connected(void);
 void CDC_enableDTR(bool enable);
 
+// getters for CDC line codings. Do not expose struct directly
+uint32_t CDC_getBaudrate(void);
+uint8_t  CDC_getStopBits(void);
+uint8_t  CDC_getParity(void);
+uint8_t  CDC_getDataBits(void);
+
 #ifdef __cplusplus
 }
 #endif

libraries/USBDevice/src/USBSerial.cpp

@@ -158,22 +158,26 @@ void USBSerial::flush(void)
 
 uint32_t USBSerial::baud()
 {
-  return 115200;
+  // return (virtual) CDC line setting coding
+  return CDC_getBaudrate();
 }
 
 uint8_t USBSerial::stopbits()
 {
-  return ONE_STOP_BIT;
+  // return (virtual) CDC line setting coding
+  return CDC_getStopBits();
 }
 
 uint8_t USBSerial::paritytype()
 {
-  return NO_PARITY;
+  // return (virtual) CDC line setting coding
+  return CDC_getParity();
 }
 
 uint8_t USBSerial::numbits()
 {
-  return 8;
+  // return (virtual) CDC line setting coding
+  return CDC_getDataBits();
 }
 
 void USBSerial::dtr(bool enable)

libraries/USBDevice/src/cdc/usbd_cdc_if.c

@@ -379,6 +379,30 @@ void CDC_enableDTR(bool enable)
   CDC_DTR_enabled = enable;
 }
 
+// getter for CDC baudrate
+uint32_t CDC_getBaudrate()
+{
+  return linecoding.bitrate;
+}
+
+// getter for CDC stop bits. Note: CDC definition identical to USBSerial.h
+uint8_t  CDC_getStopBits(void)
+{
+  return linecoding.format;
+}
+
+// getter for CDC parity. Note: CDC definition identical to USBSerial.h
+uint8_t  CDC_getParity(void)
+{
+  return linecoding.paritytype;
+}
+
+// getter for CDC data bits. Note: CDC definition identical to USBSerial.h
+uint8_t  CDC_getDataBits(void)
+{
+  return linecoding.datatype;
+}
+
 #endif /* USBD_USE_CDC */
 #endif /* USBCON */
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/