1 files changed, 44 insertions, 0 deletions
diff --git a/teensy/usb.c b/teensy/usb.c
new file mode 100644
index 0000000000..a045a2ed69
--- /dev/null
+++ b/teensy/usb.c
@@ -0,0 +1,44 @@
+#include "Arduino.h"
+
+#include "usb.h"
+#include "usb_serial.h"
+
+int usb_vcp_is_connected(void)
+{
+  return usb_configuration && (usb_cdc_line_rtsdtr & (USB_SERIAL_DTR | USB_SERIAL_RTS));
+}
+
+int usb_vcp_is_enabled(void)
+{
+  return 1;
+}
+
+int usb_vcp_rx_any(void)
+{
+  return usb_serial_available();
+}
+
+char usb_vcp_rx_get(void)
+{
+  return usb_serial_getchar();
+}
+
+void usb_vcp_send_str(const char* str)
+{
+  usb_vcp_send_strn(str, strlen(str));
+}
+
+void usb_vcp_send_strn(const char* str, int len)
+{
+  usb_serial_write(str, len);
+}
+
+void usb_vcp_send_strn_cooked(const char *str, int len)
+{
+  for (const char *top = str + len; str < top; str++) {
+    if (*str == '\n') {
+      usb_serial_putchar('\r');
+    }
+    usb_serial_putchar(*str);
+  }
+}