Function tx_callback

src/usb_serial.rs:190–194

(packet: &UsbEndpointTransferDescriptor)

    }
}
fn tx_callback(packet: &UsbEndpointTransferDescriptor) {
    if (packet.status & 0x80) != 0 {
        usb_timer_oneshot();
    }
}

/// Write a single byte to the USB host.
///