1.4. Feature Configuration Description (FCD) File

An FCD file (.fcd) must be downloaded to each DM3 board in the system. The purpose of the FCD file is to adjust the settings of the components that make up each product. For example, the FCD file may contain instructions to set certain country codes, or may send messages that configure the Telephony Service Provider (TSP) component to operate with a particular network protocol.

The FCD file defines a simple message form that the downloader parses and sends to a specific component. These parameters are sent to a component within a DM3 message and can be thought of as configurable features of a component.

To modify the FCD file parameters, the associated CONFIG file and FCDGEN utility is used. FCDGEN is a command line utility that uses the modified CONFIG file to generate an updated FCD file. After the FCD file is updated, it is downloaded to the board. For a detailed procedure, refer to Section 2.1, Modifying the FCD File Parameters Using FCDGEN.

CAUTION
The FCD file should not be edited directly. If parameters require modification, the changes are made by editing the associated CONFIG file. After editing the CONFIG file, the FCDGEN utility is used to generate a modified FCD file.

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