3，端点长度为64，也就是单次最多可以传输64个字节数据。

constuint8_t CustomHID_ReportDescriptor[CUSTOMHID_SIZ_REPORT_DESC] =

{

        0x05, 0x8c, /* USAGE_PAGE (ST Page) */

        0x09, 0x01, /* USAGE (Demo Kit) */

        0xa1, 0x01, /* COLLECTION (Application) */

        // The Input report

        0x09,0x03, // USAGE ID - Vendor defined

        0x15,0x00, // LOGICAL_MINIMUM (0)

        0x26,0x00, 0xFF, // LOGICAL_MAXIMUM (255)

        0x75,0x08, // REPORT_SIZE (8bit)

        0x95,0x40, // REPORT_COUNT (64Byte)

        0x81,0x02, // INPUT (Data,Var,Abs)

        // The Output report

        0x09,0x04, // USAGE ID - Vendor defined

        0x15,0x00, // LOGICAL_MINIMUM (0)

        0x26,0x00,0xFF, // LOGICAL_MAXIMUM (255)

        0x75,0x08, // REPORT_SIZE (8bit)

        0x95,0x40, // REPORT_COUNT (64Byte)

        0x91,0x02, // OUTPUT (Data,Var,Abs)

        0xc0 /* END_COLLECTION */

}; /* CustomHID_ReportDescriptor */

/**

  * @brief  发送数据后读取数据

  * @param  None

  * @retval None

  */

voidHIDSampleFunc(void)  

{      

        HANDLE      hDev;      

        BYTE        recvDataBuf[1024],reportBuf[1024];;                  

        DWORD       bytes;      

        hDev = OpenMyHIDDevice(0); // 打开设备，不使用重叠（异步）方式 ;     

        if(hDev == INVALID_HANDLE_VALUE){          

                printf("INVALID_HANDLE_VALUE\n");

                return; 

        }

        reportBuf[0] = 0; // 输出报告的报告 ID 是 0     

        for(inti=0;i

                reportBuf[i+1]=i+1;//将数据存放在数据缓冲区

        }

        printf("开始写数据到设备...\n");

        // 写入数据到设备，注意，第三个参数值必须为REPORT_COUNT+1，否则会返回1784错误

        if(!WriteFile(hDev, reportBuf, REPORT_COUNT+1, &bytes, NULL)){          

                printf("write data error! %d\n",GetLastError());

                return;   

        }else{

                printf("成功向设备写出%d个数据... \n",bytes);

        }

        printf("开始从设备读取数据...\n");

        // 从设备读取数据，注意，第三个参数值必须大于等于REPORT_COUNT+1，否则会返回1784错误

        if(!ReadFile(hDev, recvDataBuf, REPORT_COUNT+1, &bytes, NULL)){ // 读取设备发给主机的数据 

                printf("read data error! %d\n",GetLastError());

                return;   

        }else{

                printf("成功向设备读出%d个数据... \n",bytes);

        }

        printf("设备返回的数据为：\n");

        //显示读取回来的数据

        for(inti=0;i

                printf("0x%02X ",recvDataBuf[i+1]);

        }

        printf("\n\r");

}