How to use PSP Driver - OMAPL137

Chris12247

Other Parts Discussed in Thread: OMAP-L137

Hello, [:D]

I would like to develop an application on OMAP-L137 using UART, I2C, and LCD. I use Code Composer Studio and DSP/BIOS, so I don't use Linux.
But I've a problem...

I don't know exactly how to use psp driver...
With examples, I understood that I have to use some functions like GIO_create, GIO_submit, etc, in a task.

But for my program, I would like to send a caractere on the UART port, in a SWI function. When I run my program, It doesn't work.
(In fact, nothing on my Hyper Terminal, except if I use a task [:^)] )

I have several questions:

1. Is it possible to use drivers without a task?

2. If Yes, and if the "CallBack function" is the solution, Can you explain me what's exactlty, and how to program it?

3. If NO, as I know there is no CSL, Do I program all the functions?

4. Can you recommend an example using a driver in a SWI function for studying?

Can anyone please help me?

Thanks.

Chris

over 16 years ago

0 Mariana over 16 years ago

TI__Mastermind 24340 points

Hi Chris,

I guess it is possible to use the drivers as you want, but I did not find any examples.

The TSK use would be the easiest way to go as it is ready - why do you need it in a SWI?

Not all the functions can be called from a SWI, for example see page 184 of the BIOS API document:

GIO_create cannot be called from the context of a SWI or HWI thread.

GIO_read has restrictions to be called from a SWI (see page 190), but GIO_submit can be called from a SWI (see page 191).

0 Chris12247 over 16 years ago in reply to Mariana

Prodigy 100 points

Hi Mariana,

Sorry for the late and thank you for your reply.

It's the first time that i use the Task. I don't know exactly how works GIO or SIO functions, but i learn.

Maybe someone can recommend me a documentation for studying these functions ?

Thanks

Chris

0 Mariana over 16 years ago in reply to Chris12247

TI__Mastermind 24340 points

Hi Chris,

I would suggest you use and take a look at the examples we have using the drivers. After following the GSG they are at:

C:\Program Files\Texas Instruments\pspdrivers_01_20_00\packages\ti\pspiom\examples\evm6747

You could look at the documents:

DSP/BIOS Device Driver Developer's Guide: http://focus.ti.com/lit/ug/spru616/spru616.pdf

TMS320C6000 DSP/BIOS User's Guide: http://focus.ti.com/lit/ug/spru303b/spru303b.pdf

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How to use PSP Driver - OMAPL137