BUG: Windows CE 2.11 CEPC Serial Driver Fails on COM2 and COM3 (203751)
The information in this article applies to:
- Microsoft Windows CE Platform Builder 2.11
This article was previously published under Q203751 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. - Set the jumper settings on the modem to COM3, IRQ4 and non plug and play mode.
- 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 );
- Set the following environment variables,
set IMGCOM2=1
set ODO_NOMODEM=1
- 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"
- Re-run your "x86 MAXALL" shortcut so that these setting take.
- Build MAXALL.
- Test your modem device.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.
| Modification Type: | Major | Last Reviewed: | 11/18/2004 |
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| Keywords: | kbbug KB203751 |
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