Merge pull request #7227 from jepler/serial-break-is-interrupt

Allow serial "break" to trigger KeyboardInterrupt

supervisor/shared/usb/usb.c

@@ -341,7 +341,7 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
 #endif // CIRCUITPY_USB_VENDOR
 
 
-#if MICROPY_KBD_EXCEPTION
+#if MICROPY_KBD_EXCEPTION && CIRCUITPY_USB_CDC
 
 /**
  * Callback invoked when received an "wanted" char.
@@ -359,4 +359,10 @@ void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char) {
     }
 }
 
+void tud_cdc_send_break_cb(uint8_t itf, uint16_t duration_ms) {
+    if (usb_cdc_console_enabled() && mp_interrupt_char != -1 && itf == 0 && duration_ms > 0) {
+        mp_sched_keyboard_interrupt();
+    }
+}
+
 #endif