Error using multiples USB CDC using STM32l4 for win7 32 bits

[valverdelucas]

Posted on October 28, 2016 at 17:45

Hi all,

We are trying to implement two CDC using an stm32l4. Both CDC works find with a win7 64 bits and also with Linux. We also get success using win7 32bit but only when we implement one CDC. We are using the last STM32 driver V1.4.0 (same problems with 1.3.1) The problem occurs when we plug the USB to the PC, we get an BSOD, writting ''usbser.sys''

Here is our descriptors configuration:

/*

USB Standard Device Descriptor */

__ALIGN_BEGIN uint8_t USBD_FS_DeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END =   {     0x12,                       /*bLength */     USB_DESC_TYPE_DEVICE,       /*bDescriptorType*/ &sharpif (USBD_LPM_ENABLED == 1)     0x01,                       /*bcdUSB */ /* changed to USB version 2.01                                                in order to support LPM L1 suspend                                                resume test of USBCV3.0*/ &sharpelse       0x00,                       /* bcdUSB */ &sharpendif     0x02,     0x02,                        /*bDeviceClass*/     0x02,                       /*bDeviceSubClass*/     0x00,                       /*bDeviceProtocol*/     USB_MAX_EP0_SIZE,          /*bMaxPacketSize*/     LOBYTE(USBD_VID),           /*idVendor*/     HIBYTE(USBD_VID),           /*idVendor*/     LOBYTE(USBD_PID_FS),           /*idVendor*/     HIBYTE(USBD_PID_FS),           /*idVendor*/     0x00,                       /*bcdDevice rel. 2.00*/     0x02,     USBD_IDX_MFC_STR,           /*Index of manufacturer  string*/     USBD_IDX_PRODUCT_STR,       /*Index of product string*/     USBD_IDX_SERIAL_STR,        /*Index of serial number string*/     USBD_MAX_NUM_CONFIGURATION  /*bNumConfigurations*/   } ;

Here is our stmcdc.inf

;------------------------------------------------------------------------------ ; STMicroelectronics Comunication Device Class driver (CDC) INF FILE ; (C)2010 Copyright STMicroelectronics ;------------------------------------------------------------------------------ [Version] Signature=''$Windows NT$'' Class=Ports ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318} Provider=%PRVDR% CatalogFile=stmcdc.cat DriverVer=04/25/2010,1.3.1 [SourceDisksNames] 1=%DriversDisk%,,, [SourceDisksFiles] [Manufacturer] %MFGNAME%=DeviceList,NT,NTamd64 [DestinationDirs] DefaultDestDir = 12 ;------------------------------------------------------------------------------ ;            VID/PID Settings ;------------------------------------------------------------------------------ [DeviceList.NT] %DESCRIPTION%=DriverInstall,USB\VID_0483&PID_5740 [DeviceList.NTamd64] %DESCRIPTION%=DriverInstall,USB\VID_0483&PID_5740 [DriverInstall.NT] Include=mdmcpq.inf CopyFiles=FakeModemCopyFileSection AddReg=DriverInstall.NT.AddReg [DriverInstall.NT.AddReg] HKR,,DevLoader,,*ntkern HKR,,NTMPDriver,,usbser.sys HKR,,EnumPropPages32,,''MsPorts.dll,SerialPortPropPageProvider'' [DriverInstall.NT.Services] AddService=usbser, 0x00000002, DriverServiceInst [DriverServiceInst] DisplayName=%SERVICE% ServiceType = 1 ; SERVICE_KERNEL_DRIVER StartType = 3 ; SERVICE_DEMAND_START ErrorControl = 1 ; SERVICE_ERROR_NORMAL ServiceBinary= %12%\usbser.sys LoadOrderGroup = Base ;------------------------------------------------------------------------------ ;              String Definitions ;------------------------------------------------------------------------------ [Strings] PRVDR = ''STMicroelectronics'' MFGNAME = ''STMicroelectronics.'' DESCRIPTION = ''STMicroelectronics Virtual COM Port'' SERVICE = ''STM Virtual COM Port'' DriversDisk = ''STM Drivers Disk''  Any idea ? Thank you, for your support. #usb #stm32l4 #cdc #vcp #32bits

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