在Windows

Question

我正在尝试制作一小段接收数据并将数据发送到HID（Texas Instrument HDK）的代码。嵌入式系统代码没有错误（我可以将mac OS上的java程序数据发送到设备）。

接收工作正常，但我无法发送数据（总是收到错误io返回代码）。

这是代码

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include "libusb.h"

const static int PACKET_INT_LEN = 4;
const static int INTERFACE = 0;
const static int ENDPOINT_INT_IN = 0x83;  /* endpoint 3 address for IN */
const static int ENDPOINT_INT_OUT = 0x04; /* endpoint 4 address for OUT */
const static int TIMEOUT = 5000; 

#pragma comment(lib, "libusb-1.0.lib")

using namespace std; 

libusb_device ** DoList();
libusb_device_handle * GetDevice(libusb_device ** deviceList);
int test_interrupt_transfer(libusb_device_handle * devh);
void error_interrupt_transfert(int r);

int main()
{
    libusb_context ** context = NULL;

    libusb_device_handle * deviceHandle = NULL;

    int result_init = 0;

    result_init = libusb_init(context);

    if (result_init < 0)
        cout << "Failed to init libusb." << endl;
    else
        deviceHandle = GetDevice(DoList());

    int err = libusb_kernel_driver_active(deviceHandle, 0); 
    if (err >= LIBUSB_SUCCESS)
    {
        if (err == 1)
        {
            printf("Kernel driver is active, trying to detach"); 
            err = libusb_detach_kernel_driver(deviceHandle, 0);

            if (err != LIBUSB_SUCCESS)
            {
                printf("Error detaching interface from kernel");
            }
        }
    }

    if (libusb_kernel_driver_active(deviceHandle, 0) == 1)
    {
        if (libusb_detach_kernel_driver(deviceHandle, 0) == 0)
            cout << "Kernel driver detatched !" << endl; 
    }
    while (1)
    {
        test_interrupt_transfer(deviceHandle);

        cout << 1 << endl; 
        Sleep(3000); 
    }

    system("pause");
}

libusb_device ** DoList()
{
    libusb_device **devs;
    ssize_t count; 

    count = libusb_get_device_list(NULL, &devs); 
    if (count < 0)
    {
        cout << "Failed to get device list";
        return NULL;
    }
    libusb_device *dev;
    int i = 0; 

    cout << "Device list" << endl;
    while ((dev = devs[i++]) != NULL)
    {
        struct libusb_device_descriptor desc;
        int r = libusb_get_device_descriptor(dev, &desc); 

        if (r < 0)
        {
            cout << "Failed to get device descriptor" << endl;
            return NULL; 
        }
        printf("\t%04x:%04x (bus %d, device %d)\n",
                desc.idVendor, desc.idProduct,
                libusb_get_bus_number(dev), libusb_get_device_address(dev));
    }
    return devs;
}

libusb_device_handle * GetDevice(libusb_device ** devList)
{
    int i = 0,
        vid = 0x1cbe,
        pid = 0;
    libusb_device * dev;
    libusb_device_handle * handle = NULL;
    unsigned char strDesc[256];

    if (devList == NULL)
    {
        return NULL;
    }

    while ((dev = devList[i++]) != NULL)
    {
        struct libusb_device_descriptor desc;
        struct libusb_config_descriptor ** conDesc = NULL;

        int ret = libusb_get_device_descriptor(dev, &desc); 
        if (ret < 0)
        {
            cout << "Failed libusb_get_device_descriptor" << endl; 
            continue; 
        }
        if (desc.idVendor == vid && desc.idProduct == pid)
        {
            int ret = libusb_open(dev, &handle); 
            if (ret < 0)
            {
                cout << "Failed libusb_open" << ret << endl; 
                break; 
            }

            ret = libusb_claim_interface(handle, 0); 
            if (ret < 0)
            {
                cout << "Failed libusb_claim_interface" << endl; 
                libusb_close(handle);
                handle = NULL;
                break;
            }

            libusb_get_string_descriptor_ascii(handle, desc.iManufacturer, strDesc, 256);
            printf("     Manufacturer = %s\n", strDesc);

            libusb_get_string_descriptor_ascii(handle, desc.iProduct, strDesc, 256);
            printf("     Product = %s\n", strDesc);

            libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, strDesc, 256);
            printf("     Serial number = %s\n", strDesc);
            break; 
        }
    }
    cout << "Success openning device" << endl; 

    libusb_free_device_list(devList, 1);
    return handle; 
}

int test_interrupt_transfer(libusb_device_handle * devh)
{
    int r, i;
    int transferred = 0;
    int * ptransferred = &transferred;
    unsigned char answer[PACKET_INT_LEN];
    unsigned char question[2];

    r = libusb_interrupt_transfer(devh, ENDPOINT_INT_OUT, question,
                                  sizeof(question), ptransferred, TIMEOUT);
    if (r < 0) {
        error_interrupt_transfert(r);
        return r;
    }

    r = libusb_interrupt_transfer(devh, ENDPOINT_INT_IN, answer, PACKET_INT_LEN,
        &transferred, TIMEOUT);
    if (r < 0) 
    {
        error_interrupt_transfert(r);
        return r;
    }

    for (i = 0; i < PACKET_INT_LEN; i++) 
    {
        printf("%02x; ", answer[i]);
    }
    printf("\n");
    return 0;
}

void error_interrupt_transfert(int r)
{
    switch (r)
    {
    case LIBUSB_SUCCESS: cout << "Success" << endl; 
        break; 
    case LIBUSB_ERROR_TIMEOUT: cout << "Timeout" << endl;
        break;
    case LIBUSB_ERROR_PIPE: cout << "Error pipe" << endl;
        break;
    case LIBUSB_ERROR_OVERFLOW: cout << "Overflow" << endl;
        break;
    case LIBUSB_ERROR_NO_DEVICE: cout << "No device" << endl;
        break;
    case LIBUSB_ERROR_IO: cout << "Error IO" << endl;
        break;
    case LIBUSB_ERROR_NOT_FOUND: cout << "Not found" << endl; 
        break; 
    case LIBUSB_ERROR_INVALID_PARAM: cout << "Invalid param" << endl;
        break; 
    case LIBUSB_ERROR_ACCESS: cout << "Error access" << endl; 
        break; 
    case LIBUSB_ERROR_INTERRUPTED: cout << "Interrupted" << endl; 
        break;
    case LIBUSB_ERROR_BUSY: cout << "Busy" << endl; 
        break; 
    case LIBUSB_ERROR_NO_MEM: cout << "No memory" << endl; 
        break; 
    case LIBUSB_ERROR_NOT_SUPPORTED: cout << "Not supported" << endl; 
        break; 
    case LIBUSB_ERROR_OTHER: cout << "Other" << endl;
        break; 
    default: cout << "Unknow error code" << r << endl;
    }
}

有什么想法吗？

CalmantKévin