diff options
| -rw-r--r-- | wirish/usb_serial.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/wirish/usb_serial.cpp b/wirish/usb_serial.cpp index 380f197..d21766f 100644 --- a/wirish/usb_serial.cpp +++ b/wirish/usb_serial.cpp @@ -92,13 +92,24 @@ void USBSerial::write(const void *buf, uint32 len) { uint32 old_txed = 0; uint32 start = millis(); + uint32 sent = 0; + while (txed < len && (millis() - start < USB_TIMEOUT)) { - txed += usb_cdcacm_tx((const uint8*)buf + txed, len - txed); + sent = usb_cdcacm_tx((const uint8*)buf + txed, len - txed); + txed += sent; if (old_txed != txed) { start = millis(); } old_txed = txed; } + + + if (sent == USB_CDCACM_TX_EPSIZE) { + while (usb_cdcacm_is_transmitting() != 0) { + } + /* flush out to avoid having the pc wait for more data */ + usb_cdcacm_tx(NULL, 0); + } } uint32 USBSerial::available(void) { |