//这边将上图左边的代码拷贝下来，自行复制
{
const usb_dev usb_id = usb_device2id(usb_device);
usb_write_txcsr(usb_id, MSD_BULK_EP_IN, TXCSRP_SendStall);
u32 ot = 2000;

while (1) { udelay(100); if (ot-- == 0) { break; } if (usb_otg_online(usb_id) == DISCONN_MODE) { break; }

static void stall_outep(const struct usb_device_t *usb_device)
{
const usb_dev usb_id = usb_device2id(usb_device);
usb_write_rxcsr(usb_id, MSD_BULK_EP_OUT, RXCSRP_SendStall);
u32 ot = 2000;
udelay(100);
while (1) {
if (ot-- == 0) {
break;
}
if (usb_otg_online(usb_id) == DISCONN_MODE) {
break;