diff options
Diffstat (limited to 'cores/arduino/USBCore.cpp')
| -rw-r--r-- | cores/arduino/USBCore.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/cores/arduino/USBCore.cpp b/cores/arduino/USBCore.cpp index 9eb7b33..39a9530 100644 --- a/cores/arduino/USBCore.cpp +++ b/cores/arduino/USBCore.cpp @@ -289,9 +289,12 @@ int USB_Send(u8 ep, const void* d, int len) if (n > len) n = len; - len -= n; { LockEP lock(ep); + // Frame may have been released by the SOF interrupt handler + if (!ReadWriteAllowed()) + continue; + len -= n; if (ep & TRANSFER_ZERO) { while (n--) @@ -627,8 +630,6 @@ ISR(USB_GEN_vect) { #ifdef CDC_ENABLED USB_Flush(CDC_TX); // Send a tx frame if found - if (USB_Available(CDC_RX)) // Handle received bytes (if any) - Serial.accept(); #endif // check whether the one-shot period has elapsed. if so, turn off the LED |