DSP/BIOS based applications

seyd khazraei

Hi All

I just went through a power line communication example and noticed it has been implemented by DSP/BIOS which I am very new to. Now I have a very basic confusion here regarding DSP/BIOS.

Based on my understanding of DSP/BIOS it is an operating system for real time industrial application. So by using this, scheduling ,memory management , analysis and debugging would be much easier. So if the DSP/BIOS is that much cool why TI has not used it for all the controlsuit examples. That is by using DSP/BIOS we do not have to set the registers and hardware interrupts one by one and the DSP/ bios configuration tool can be set to take care of all this. So what is the downside that not every body is using this? Is there any limitation or specific application that we can use DSP/BIOS like the power line communication?

Thanks

over 13 years ago

0 Lori Heustess over 13 years ago

TI__Guru* 92750 points

DSP/BIOS or SYS/BIOS is mostly useful if the hardware interrupts are not enough "scheduling" and you need some sort of software interrupt/task scheduling. For example if there are a lot of communications going on you will want to have a scheduler - many folks use an RTOS on the Cortex M3 our Concerto device, for example.

0 Lori Heustess over 13 years ago in reply to Lori Heustess

TI__Guru* 92750 points

I posted before I finished my thoughts :)

DSP/BIOS or SYS/BIOS arn't free - they will require some more memory and can slow down the interrupt response. Many of our customers find the hardware interrupts are enough and don't want the overhead. Having said that, there is minimal interrupt latency described here:

There is also an app note on the subject I'll try to track down.

http://processors.wiki.ti.com/index.php/SYS/BIOS_for_the_28x

0 Frank Bormann over 13 years ago in reply to Lori Heustess

Mastermind 7585 points

Just to add another link to Lori's comment:

"Using DSP/BIOS in C2800 Applications with High Interrupt Rates" http://www.ti.com/lit/an/spraax9/spraax9.pdf

This AP-Note gives some "frightening" numbers about interrupt latencies caused by BIOS, which is probably the reason, why not everybody is keen on using it for C2000.

0 Mitja Nemec over 13 years ago in reply to Frank Bormann

Genius 5885 points

Another point is that most of the guys programming C2800 have strong power electronics background and they(we) are not that strong when it comes to RTOS concepts. So they(we) prefer simple background loop/interrupt scheme.

0 seyd khazraei over 13 years ago in reply to Mitja Nemec

Prodigy 145 points

Thanks everybody for useful information.

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DSP/BIOS based applications