Fix RP2040 Issue 1721
@@ -155,7 +155,9 @@ static void __tusb_irq_path_func(_hw_endpoint_start_next_buffer)(struct hw_endpo
// For now: skip double buffered for Device mode, OUT endpoint since
// host could send < 64 bytes and cause short packet on buffer0
// NOTE this could happen to Host mode IN endpoint
- bool const force_single = !(usb_hw->main_ctrl & USB_MAIN_CTRL_HOST_NDEVICE_BITS) && !tu_edpt_dir(ep->ep_addr);
+ // Also, Host mode interrupt endpoint hardware is only single buffered
+ bool const force_single = (!(usb_hw->main_ctrl & USB_MAIN_CTRL_HOST_NDEVICE_BITS) && !tu_edpt_dir(ep->ep_addr)) ||
+ ((usb_hw->main_ctrl & USB_MAIN_CTRL_HOST_NDEVICE_BITS) && tu_edpt_number(ep->ep_addr) != 0);
if(ep->remaining_len && !force_single)
{
