portentac33: add sleep to avoid dfu protocol error

pennam · soburi · commit 8f375db7ea88 · 2026-02-05T21:36:55.000+09:00
Co-authored-by: pennam &lt;m.pennasilico@arduino.cc&gt;
Signed-off-by: TOKITA Hiroshi &lt;tokita.hiroshi@gmail.com&gt;
diff --git a/cores/arduino/USB.cpp b/cores/arduino/USB.cpp
@@ -29,6 +29,8 @@ void arduino::SerialUSB_::baudChangeHandler(const struct device *dev, uint32_t r
 
 #if defined(CONFIG_USB_DEVICE_STACK_NEXT)
 int arduino::SerialUSB_::usb_disable() {
+	// To avoid Cannot perform port reset: 1200-bps touch: setting DTR to OFF: protocol error
+	k_sleep(K_MSEC(100));
 	return usbd_disable(Serial._usbd);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -29,6 +29,8 @@ void arduino::SerialUSB_::baudChangeHandler(const struct device *dev, uint32_t r`
`29`	`29`
`30`	`30`	`#if defined(CONFIG_USB_DEVICE_STACK_NEXT)`
`31`	`31`	`int arduino::SerialUSB_::usb_disable() {`
	`32`	`+ // To avoid Cannot perform port reset: 1200-bps touch: setting DTR to OFF: protocol error`
	`33`	`+ k_sleep(K_MSEC(100));`
`32`	`34`	`return usbd_disable(Serial._usbd);`
`33`	`35`	`}`
`34`	`36`