Chapter
5
Configuration
Prior to usage, μC/USB-Device must be properly configured. There are three groups of
configuration parameters:
■
Static stack configuration
■
Application specific configuration
■
Device and device controller driver configuration
This chapter explains how to setup all these groups of configuration. The last section of this
chapter also provides examples of configuration following examples of typical usage.
5-1 STATIC STACK CONFIGURATION
μC/USB-Device is configurable at compile time via approximately 20 #defines in the
application’s copy of usbd_cfg.h . μC/USB-Device uses #defines when possible because
they allow code and data sizes to be scaled at compile time based on enabled features and
the configured number of USB objects. This allows the Read-Only Memory (ROM) and
Random-Access Memory (RAM) footprints of μC/USB-Device to be adjusted based on
application requirements.
It is recommended that the configuration process begins with the recommended or default
configuration values which in the next sections will be shown in bold .
The sections in this chapter are organized following the order in μC/USB-Device’s template
configuration file, usbd_cfg.h .
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