Microsoft KB Archive/891897

Knowledge Base

A Windows CE XScale-based platform cannot perform serial transactions after the platform resumes from standby

Article ID: 891897

Article Last Modified on 2/3/2005

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APPLIES TO

• Microsoft Windows CE 5.0

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SYMPTOMS

When a Microsoft Windows CE XScale-based platform resumes from standby, you cannot perform serial transactions.

CAUSE

This problem occurs because of a problem with the serial driver for the XScale platform in Windows CE 5.0 Platform Builder.

RESOLUTION

To resolve this problem, follow these steps:

1. Open the WINCE500\PUBLIC\COMMON\OAK\CSP\ARM\INTEL\PXA25X\SERIAL\PDD16550\xsc16550.cpp source file for your XScale platform in Windows CE 5.0 Platform Builder.

2. Locate the following function in the source file:

   void CXSCReg16550::Restore()
   {
       if (m_fIsBackedUp) {
           Restore();
           Write_SIR(m_SIRBackup);
       }
   }

3. Replace the function in step 2 with the following code:

   void CXSCReg16550::Restore()
   {
       if (m_fIsBackedUp) {
           CReg16550::Restore();
           Write_SIR(m_SIRBackup);
       }
   }

4. Save the file.
5. Rebuild the platform.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Keywords: kbtshoot kbbug kbpending KB891897

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