Motorola MC3090G Integration Guide - Page 107

Application Deployment for WinCE 5.0 4 - 23 mobile computer. Applications stored in the Application folder are retained even when the mobile computer is cold booted, just as the Demo 3000 program is retained in memory. There are two device drivers included in the Windows CE image to assist developers in configuring the mobile computer following a cold boot: RegMerge and CopyFiles. RegMerge.dll RegMerge.dll is a built-in driver that allows registry edits to be made to the Windows CE registry. Regmerge.dll runs very early in the boot process and looks for registry files (.reg files) in certain Flash File System folders during a cold boot. It then merges the registry changes into the system registry located in RAM. Since the registry is re-created on every cold boot from the default ROM image, the RegMerge driver is necessary to make registry modifications persistent over cold boots. RegMerge is configured to look in the root of two specific folders for .reg files in the following order: \Platform \Application Regmerge continues to look for .reg files in these folders until all folders are checked. This allows folders later in the list to override folders earlier in the list. This way, it is possible to override Registry changes made by the Platforms partitions folders. Take care when using Regmerge to make registry changes. The DCP for MC3000 contains examples of .reg files. NOTE Regmerge only merges the .reg files on cold boots. The merge process is skipped during a warm boot. Making modifications to registry values for drivers loaded before RegMerge is not recommended. However, these values may require modification during software development. Since these early loading drivers read these keys before RegMerge gets a chance to change them, the mobile computer must be cold booted. The warm boot does not re-initialize the registry and the early loading driver reads the new registry values. Do not use Regmerge to modify built-in driver registry values, or merge the same registry value to two files in the same folder, as the results are undefined. CopyFiles Windows CE expects certain files to be in the Windows folder, residing in volatile storage. Windows CE maintains the System Registry in volatile storage. CopyFiles copies files from one folder to another on a cold boot. Files can be copied from a non-volatile partition (Application or Platform) to the Windows or other volatile partition during a cold boot. During a cold boot CopyFiles looks for files with a .CPY extension in the root of the Platform and Application FFS partitions (Platform first and then Application). These files are text files containing the source and destination for the desired files to be copied separated by ">". The following example from the file application.cpy is contained on the demo application partition included in the DCP for MC3000. It can also be obtained from the Support Central web site at http://www.motorola.com/enterprisemobility/support. Files are copied to the Windows folder from the Flash File System using copy files (*.cpy) in the following order: \Platform \Application Example: \Application\ScanSamp2.exe>\Windows\ScanSamp2.exe This line directs CopyFiles to copy the ScanSamp2.exe application from the \Application folder to the \Windows folder.