Chapter 3. Polled Mode Driver
- Table of Contents
- 3.1. Driver Libraries
- 3.2. Driver Interface
- 3.2.1. Driver Initialization
- 3.2.2. Dispatching Results
- 3.2.3. Sending Bulk Data
- 3.3. Example Driver
- 3.3.1. Initialization
- 3.3.2. Polled Event Loop
- 3.3.3. Sending Bulk Data
The Figure 3-1 below shows the software architecture for the polled mode LCBD.
The polled mode LCBD is used by the LAT boot application when the services of a RTOS are not available. During boot the polled mode LCBD is limited to sending and receiving traffic on the event data fabric only. The polled mode LCBD will not send or receive data on the command/response fabric.
In the absence of an RTOS processing interrupts will be not be possible. Therefore the polled mode LCBD must be driven by the boot application's event poll loop. The polling interface notifies the boot application when a new response is ready for processing.
The sending interface allows the boot application to send bulk data between CPU crates on the event fabric.