RT-Thread-usbd 驱动适配求助RT-Thread问答社区

usbd 驱动适配求助

发布于 2022-04-24 18:41:05 浏览：816 订阅该版

各位大佬好，打扰了。最尝试对照  [vivado 的例程](https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/usbps/examples/xusbps_intr_example.c), 用vivado 的官方库适配 rtt 的 usb 驱动, 目前已经可以通过 ep0 完成设备的基本信息枚举了，但不清楚 ep1 的回调接口该调用哪个 usb 的回调函数, 尝试了几个接口，似乎都不行, read 和 wirte 接口都没调用, 特来求助。谢谢!
接口代码: (完整代码: [drv_usbd.c](https://oss-club.rt-thread.org/uploads/20220424/838589cb8e9e56e06e9c64c37e43e64c.c))
```CXX
/*****************************************************************************/
/**
* This funtion is registered to handle callbacks for endpoint 1 (Bulk data).
*
* It is called from an interrupt context such that the amount of processing
* performed should be minimized.
*
*
* @param	CallBackRef is the reference passed in when the function was
*		registered.
* @param	EpNum is the Number of the endpoint on which the event occured.
* @param	EventType is type of the event that occured.
*
* @return	None.
*
* @note 	None.
*
******************************************************************************/
static void XUsbPs_Ep1EventHandler(void *CallBackRef, u8 EpNum,
					u8 EventType, void *Data)
{
	XUsbPs *InstancePtr;
	int Status;
	u8	*BufferPtr;
	u32	BufferLen;
	u32 InavalidateLen;
	u32	Handle;

rt_kprintf("XUsbPs_Ep1EventHandler\n");

Xil_AssertVoid(NULL != CallBackRef);

InstancePtr = (XUsbPs *) CallBackRef;

switch (EventType) {
	case XUSBPS_EP_EVENT_DATA_RX:
		/* Get the data buffer.*/
		Status = XUsbPs_EpBufferReceive(InstancePtr, EpNum,
					&BufferPtr, &BufferLen, &Handle);
		/* Invalidate the Buffer Pointer */
		InavalidateLen =  BufferLen;
		if (BufferLen % 32) {
			InavalidateLen = (BufferLen/32) * 32 + 32;
		}

Xil_DCacheInvalidateRange((unsigned int)BufferPtr,
									InavalidateLen);
		if (XST_SUCCESS == Status) {
			/* Handle the storage class request. */
			// XUsbPs_HandleStorageReq(InstancePtr, EpNum,
			// 				BufferPtr, BufferLen);
			// /* Release the buffer. */
            // rt_usbd_ep_in_handler(&_zynq_udc, 0x81, BufferLen); // 是这个吗？
			// rt_usbd_ep_out_handler(&_zynq_udc, 1, BufferLen); // 是这个吗？
			// rt_usbd_sof_handler(&_zynq_udc); // 是这个吗？
			hex_dump(BufferPtr, BufferLen); // 打印一下收到的数据
			rt_kprintf("XUsbPs_HandleStorageReq\n");
			XUsbPs_EpBufferRelease(Handle);
		}
		break;

default:
		/* Unhandled event. Ignore. */
		break;
	}
}
```

此状态下的控制台输出:
```SHELL
_get_string_descriptor
w: 0 26
hw_usbd_isr
XUsbPs_Ep0EventHandler
hw_usbd_isr
XUsbPs_Ep0EventHandler
rt_usbd_ep0_in_handler
message type 0
[
  setup_request : 0x0
  value         : 0x1
  length        : 0x0
  index         : 0x0
  request       : 0x9
]
_set_config
rt_usbd_set_config
rt_usbd_find_config
_set_cfg : 1
_set_cfg 2 : 1
Mass storage function enabled
_ep_read_prepare 0x001acf2c 31
hw_usbd_isr
[32m01-01 08:00:00 I/drv.mmc usbd: init 'sd0' success
[0mhw_usbd_isr
XUsbPs_Ep0EventHandler
rt_usbd_ep0_in_handler
message type 0
[
  setup_request : 0xa1
  value         : 0x0
  length        : 0x1
  index         : 0x0
  request       : 0xfe
]
rt_usbd_find_interface
mstorage_interface_handler
USBREQ_GET_MAX_LUN
w: 0 1
hw_usbd_isr
XUsbPs_Ep0EventHandler
XUsbPs_Ep1EventHandler
00000000: 55 53 42 43 A0 C9 82 32 24 00 00 00 80 00 06 12  USBC...2$.......
00000010: 00 00 00 24 00 00 00 00 00 00 00 00 00 00 00     ...$...........
XUsbPs_HandleStorageReq
hw_usbd_isr
hw_usbd_isr
XUsbPs_Ep0EventHandler
rt_usbd_ep0_in_handler
message type 0
[
  setup_request : 0x80
  value         : 0x100
  length        : 0x40
  index         : 0x0
  request       : 0x6
]
_get_device_descriptor
w: 0 18
hw_usbd_isr
XUsbPs_Ep0EventHandler
```