March 2012
Intermediate to advanced
358 pages
9h 44m
English
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Chapter 7
DSP/BIOS and Platform Support Package
- DSP/BIOS‒ real-time operating system
- DSP/BIOS‒ software kernel foundation platform support package (PSP)
The examples in this chapter illustrate the use of the DSP/BIOS real-time operating system and the platform support package.
DSP/BIOS provides real-time scheduling, analysis, and data transfer capabilities for an application running on a Texas Instruments DSP. The platform support package provides a further level of abstraction and an API for real-time applications.
7.1 INTRODUCTION TO DSP/BIOS
The following examples introduce some of the real-time scheduling features of DSP/BIOS. Example programs from previous chapters are adapted to run as DSP/BIOS applications. The XDS100 emulator built into the eXperimenter board does not support the real-time analysis (RTA) and real-time data transfer (RTDX) features of DSP/BIOS [1].
7.1.1 DSP/BIOS Threads
At the heart of DSP/BIOS is a preemptive real-time scheduler. This determines which one of a number of different threads is executed by the DSP at any given time. For the purposes of this chapter, DSP/BIOS threads are considered to be sections of program code executed by the DSP. The scheduler determines which thread to execute at a particular time according to its type and associated priority. There are several different types of thread that can be used in a DSP/BIOS application.
- Hardware Interrupts (HWIs) have the highest priority in a DSP/BIOS application. Their execution is triggered ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.