Texas Instruments C28 Series Student Guide

Scheduling DSP/BIOS Threads
Priority Based Thread Scheduling
Priority Based Thread Scheduling
HWI 2
HWI 1
SWI 3
SWI 2
SWI 1
MAIN
IDLE
int1
rtn
post2 rtn
int2
post3 rtn
post1
rtn
rtn
rtn
User sets the priority...BIOS does the scheduling
(highest)
(lowest)
SWI_post(&swi2);
Another Solution
Another Solution
–
–
Tasks (TSK)
Tasks (TSK)
 DSP/BIOS tasks (TSK) are similar to SWI, but
offer additional flexibility
 SWIs must run to completion
 TSKs can be terminated by software
 Tradeoffs
 SWI context switch is faster than TSK
 TSK module requires more code space
 TSKs have their own stack
 User preference and system needs usually
dictates choice, easy to use both
main
{ …
// return to O/S;
}
DSP/BIOS
Function 2
Function 1
C28x - Using DSP/BIOS 9 - 9

Texas Instruments C28 Series Specifications

General

Brand	Texas Instruments
Model	C28 Series
Category	Computer Hardware
Language	English