parent 0ae125d

author Venelin Efremov <[email protected]> 1550459642 -0800
committer Venelin Efremov <[email protected]> 1551218346 -0800

Return the correct bytes written.

Also check the DTR value, when deciding to drop data.

Update cores/arduino/stm32/usb/cdc/usbd_cdc_if.c

Co-Authored-By: ghent360 <[email protected]>

Update cores/arduino/stm32/usb/cdc/usbd_cdc_if.h

Co-Authored-By: ghent360 <[email protected]>

Revert CDC_connected back to unit8_t, to maintain "C" compatibility.
Add isConnected() methor to USBSerial.

Switch CDC_connected() to bool - final answer.

Remove redundant variable.

Author: ghent360

Diff for: cores/arduino/USBSerial.cpp

@@ -84,7 +84,7 @@ size_t USBSerial::write(const uint8_t *buffer, size_t size)
       // After storing data, start transmitting process
       CDC_continue_transmit();
     } else if (!CDC_connected()) {
-      return size;
+      return size - rest;
     }
   }
   return size;
@@ -187,6 +187,11 @@ bool USBSerial::rts(void)
   return false;
 }
 
+bool USBSerial::isConnected()
+{
+  return CDC_connected();
+}
+
 USBSerial::operator bool()
 {
   bool result = false;

Diff for: cores/arduino/USBSerial.h

@@ -53,6 +53,7 @@ class USBSerial : public Stream {
     uint8_t numbits();
     bool dtr();
     bool rts();
+    bool isConnected();
     enum {
       ONE_STOP_BIT = 0,
       ONE_AND_HALF_STOP_BIT = 1,

Diff for: cores/arduino/stm32/usb/cdc/usbd_cdc_if.h

@@ -50,7 +50,7 @@ void CDC_continue_transmit(void);
 void CDC_resume_receive(void);
 void CDC_init(void);
 void CDC_deInit(void);
-uint8_t CDC_connected();
+bool CDC_connected();
 
 #ifdef __cplusplus
 }