Bus 001 Device 005: ID 2207:0011
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2207
idProduct 0x0011
bcdDevice 3.10
iManufacturer 1 rockchip
iProduct 2 rk3xxx
iSerial 3 6555895b72d658ff
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 62
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 4 adb_mtp
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 0
iInterface 5 MTP
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x001c 1x 28 bytes
bInterval 6
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 66
bInterfaceProtocol 1
iInterface 6 ADB Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Binary Object Store Descriptor:
bLength 5
bDescriptorType 15
wTotalLength 22
bNumDeviceCaps 2
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType 16
bDevCapabilityType 2
bmAttributes 0x00000006
Link Power Management (LPM) Supported
SuperSpeed USB Device Capability:
bLength 10
bDescriptorType 16
bDevCapabilityType 3
bmAttributes 0x00
wSpeedsSupported 0x000f
Device can operate at Low Speed (1Mbps)
Device can operate at Full Speed (12Mbps)
Device can operate at High Speed (480Mbps)
Device can operate at SuperSpeed (5Gbps)
bFunctionalitySupport 1
Lowest fully-functional device speed is Full Speed (12Mbps)
bU1DevExitLat 1 micro seconds
bU2DevExitLat 500 micro seconds
Device Status: 0x0000
(Bus Powered)
#include
#include
#include "libusb.h"
int main(int argc, char *argv[])
{
if (argc != 5) { // 列如 ./a.out 0x2207 0x0011 0x01 0x81
printf("参数不对!\n");
return -1;
}
// init
int nRet = libusb_init(NULL);
if (nRet < 0)
{
printf("libusb_init(NULL) failed:[%s] \n", libusb_strerror(nRet));
return -1;
}
printf("libusb_init(NULL) ok \n");
// open device
libusb_device_handle* pHandle = libusb_open_device_with_vid_pid(NULL, strtol(argv[1], NULL, 16), strtol(argv[2], NULL, 16));
if (pHandle == NULL)
{
printf("libusb_open_device_with_vid_pid(%s, %s) failed \n", argv[1], argv[2]);
libusb_exit(NULL);
return -1;
}
printf("libusb_open_device_with_vid_pid(%s, %s) ok \n", argv[1], argv[2]);
if (libusb_kernel_driver_active(pHandle, 0) == 1)
{
printf("USB Kernel Driver Active \n");
if (libusb_kernel_driver_active(pHandle, 0) == 0)
{
printf("Kernel Driver Detached \n");
}
}
libusb_detach_kernel_driver(pHandle, 0);
// declare interface
nRet = libusb_claim_interface(pHandle, 0);
if (nRet < 0)
{
printf("libusb_claim_interface(0) failed:[%s] \n", libusb_strerror(nRet));
libusb_close(pHandle);
libusb_exit(NULL);
return -1;
}
printf("libusb_claim_interface(0) ok \n");
// write data
char sBuf[] = "0123456789";
int nActualBytes = 0;
libusb_clear_halt(pHandle, strtol(argv[3], NULL, 16));
nRet = libusb_bulk_transfer(pHandle, strtol(argv[3], NULL, 16), sBuf, sizeof(sBuf), &nActualBytes, 500);
if (nRet < 0)
{
printf("libusb_bulk_transfer(%s) write failed:[%s] \n", argv[3], libusb_strerror(nRet));
libusb_release_interface(pHandle, 0);
libusb_close(pHandle);
libusb_exit(NULL);
return -1;
}
printf("libusb_bulk_transfer(%s) write size:[%d] \n", argv[3], nActualBytes);
// read data
char sBuf2[64] = {0};
nActualBytes = 0;
libusb_clear_halt(pHandle, strtol(argv[4], NULL, 16));
nRet = libusb_bulk_transfer(pHandle, strtol(argv[4], NULL, 16), sBuf2, sizeof(sBuf2), &nActualBytes, 500);
if (nRet < 0)
{
printf("libusb_bulk_transfer(%s) read failed:[%s] \n", argv[4], libusb_strerror(nRet));
libusb_release_interface(pHandle, 0);
libusb_close(pHandle);
libusb_exit(NULL);
return -1;
}
printf("libusb_bulk_transfer(%s) read size:[%d] \n", argv[4], nActualBytes);
// release interface
libusb_release_interface(pHandle, 0);
// close device
libusb_close(pHandle);
// release
libusb_exit(NULL);
return 0;
}
[root@RK356X:/userdata]# ./a.out 0x2207 0x0011 0x01 0x81
libusb_init(NULL) ok
libusb_open_device_with_vid_pid(0x2207, 0x0011) ok
libusb_claim_interface(0) ok
libusb_bulk_transfer(0x01) write size:[10]
libusb_bulk_transfer(0x81) read failed:[Operation timed out]
你这个USB的VID PID是瑞芯微的吧 你读的话要RK那边给你发数据才能读到啊 RK那边发数据了吗 你可以用Bus Hound监控一下
你需要在对端做一个数据处理和应答程序
接收数据时，函数libusb_bulk_transfer最后一个参数，超时时间设为0呢？
你看看这个博文的思路，是否帮助到你【libusb：libusb_bulk_transfer的timeout参数问题】：https://blog.csdn.net/u012247418/article/details/86252528
这篇文章 写了 对 libusb bulk transfers通信超时得可能存在得问题
https://www.codenong.com/46181087/
可以看看，有问题在一起探讨