hid_write一直返回-1，hid_error函数返回函数不正确。

直接使用WriteFile也是返回false，GetLastError函数返回ERROR_INVALID_FUNCTION ，代码及输出如下：

 

Device Found

type: 1ff7 0001

path: \\?\hid#vid_1ff7&pid_0001&mi_00&col06#7&3683c34&0&0005#{4d1e55b2-f16f-11cf-88cb-001111000030}

serial_number: 00000000001A

Manufacturer: Touch Devic

Product: Touch Device

Manufacturer String: Touch Devic

Product String: Touch Device

Serial Number String: 00000000001A

Write Res = -1,error:函数不正确。

Read Ret = 0

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include 
#include "touchdevice.h"
#include 
#include "../HidLib/hidapi.h"

#define MAX_STR 255
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    UCHAR commandbuf[64] = {0};
    UCHAR rebuf[64] = {0};

    int res;
    unsigned char buf[64];
    wchar_t wstr[MAX_STR];
    wchar_t *str_s = NULL;
    hid_device *handle;
    int i;

    // Enumerate and print the HID devices on the system
    struct hid_device_info *devs, *cur_dev;
    devs = hid_enumerate(TOUCH_ViD, TOUCH_PiD_1);
    cur_dev = devs;
    while (cur_dev) {
        qDebug("Device Found\n  type: %04hx %04hx\n  path: %s\n  serial_number: %ls",cur_dev->vendor_id, cur_dev->product_id, cur_dev->path, cur_dev->serial_number);
        qDebug("\n");
        qDebug("  Manufacturer: %ls\n", cur_dev->manufacturer_string);
        qDebug("  Product:      %ls\n", cur_dev->product_string);
        qDebug("\n");
        cur_dev = cur_dev->next;
    }
    hid_free_enumeration(devs);

    // Open the device using the VID, PID,
    // and optionally the Serial number.
    handle = hid_open(TOUCH_ViD, TOUCH_PiD_1, NULL);

    // Read the Manufacturer String
    res = hid_get_manufacturer_string(handle, wstr, MAX_STR);

    qDebug("Manufacturer String: %ls\n", wstr);
    // Read the Product String
    res = hid_get_product_string(handle, wstr, MAX_STR);

    qDebug("Product String: %ls\n", wstr);

    // Read the Serial Number String
    res = hid_get_serial_number_string(handle, wstr, MAX_STR);
    qDebug("Serial Number String: %ls", wstr);
    qDebug("\n");

    // Send a Feature Report to the device
    buf[0] = (INITIATIVE_REPORT); // First byte is report number
    buf[1] = (VERSION);
    buf[2] = (VER_BOARD_TYPE_GET);

    // Set the hid_read() function to be non-blocking.
    hid_set_nonblocking(handle, 1);

    res = hid_write(handle, buf, 64);
    qDebug("Write Res = %d,error:%ls",res,hid_error(handle));

    // Read requested state
    res = hid_read_timeout(handle, buf, 64,100);

    if (res < 0)
    {
        qDebug("Unable to read()\n");
    }
    else
    {
        qDebug("Read Ret = %d\n",res);
    }

    // Print out the returned buffer.
    for (i = 0; i < res; i++)
        qDebug("buf[%d]: %d\n", i, buf[i]);

    hid_close(handle);
}

MainWindow::~MainWindow()
{
    delete ui;
}