BUG: Windows CE 2.1 CEPC Serial Driver Fails on COM2 and COM3

• Microsoft Windows CE Platform Builder, version 2.11

SYMPTOMS

After building the x86 Windows CE 2.11 configuration for the PC-based Reference Platform with support for serial devices like modems on COM2, the devices cannot be opened.

CAUSE

This is due to a bug in the serial driver that ships in Platform builder 2.11.

RESOLUTION

To get a serial device like ISA modem to run on COM 2 follow the steps below.

1. Set the jumper settings on the modem to COM3, IRQ4 and non plug and play mode.



2. Make the following code change to \WINCE211\PLATFORM\CEPC\DRIVERS\SERIAL.PDD\SER_PDD.C. Original code on line 303 of SER_PDD.C:

   
       extern PHWOBJ       rgpHWObjects; 

   Fix:

   
       extern PHWOBJ       rgpHWObjects[]; 

   Also change line 372 in SER_PDD.C to Original.

   
   //rgpHWObjects[pHWHead->dwDevIndex].dwIntID = MapIrq2SysIntr( pHWHead->dwIRQ ); 

   Modified:

   
    rgpHWObjects[pHWHead->dwDevIndex]->dwIntID = MapIrq2SysIntr( pHWHead->dwIRQ ); 




3. Set the following environment variables,
   

   
       set IMGCOM2=1
       set ODO_NOMODEM=1 




4. In Common.reg create an additional entry for COM2 like below,

   
      [HKEY_LOCAL_MACHINE\ExtModems\AnHayesCompat
      "Port"="COM2:"
      "DeviceType"=dword:1
      "FriendlyName"="This is on COM2" 

   
   



5. Re-run your "x86 MAXALL" shortcut so that these setting take.



6. Build MAXALL.



7. Test your modem device.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

Additional query words: kbDSupport

Keywords :
Version : N\A:2.11
Platform : N\A
Issue type : kbbug