Check USB DTR is active before sending data down the USB port (this should only be active when the port is connected to a terminal).

2016-02-22 22:02:45 +00:00 · 2016-02-22 22:02:45 +00:00 · 618ffd069d
parent 20331cea64
commit 618ffd069d
1 changed files with 1 additions and 1 deletions
--- a/STM32F1/cores/maple/usb_serial.cpp
+++ b/STM32F1/cores/maple/usb_serial.cpp
@ -106,7 +106,7 @@ size_t n = 0;

 size_t USBSerial::write(const void *buf, uint32 len) {
 size_t n = 0;
-    if (!this->isConnected() || !buf) {
+    if (!this->isConnected() || !usb_cdcacm_get_dtr() || !buf) {
        return 0;
    }