Product manual

PX Range Product Manual Version 2.0 © Copyright Brainboxes Limited 2010 Page 22 of 37
3.5. UART Settings
The UART settings for the Brainboxes COM Port allow you to get the best performance from your device and
system. There are two choices, dependant on whether minimal CPU usage or Data Latency (delay) is the
main concern.
The default settings have been carefully selected and should provide great performance for the majority of
users. The UART Settings will help if you need to lower the CPU usage, or your application is timing critical
and requires a lower Data Latency
• To open Advanced Settings, open the Port Settings (as described in section 3.2) and click the
Advanced button
• Select the ‘UART Settings’ tab.
Receive Trigger Level:
• This slider allows you to choose how much incoming data is stored in the Receive FIFO before it
gets processed by the driver.
• Processing the data takes a small amount of CPU time, so doing this frequently will increase
CPU Usage, but it will also decrease the latency at which data is delivered to the application.
Choosing the right value is a trade-off between CPU Usage and Latency.