C6747 BIOS PSP / reentrant question

Greg Konopko

I have query about C6747 BIOS PSP drivers (ver. 01.30.00.05).

Is a driver's API reentrant, specially I am interesting GPIO driver.

For instance I would like to use Gpio_setPinVal() from multiple context. I can not find anything about in documentation.

From Gpio.c I have doubts that this driver is reentrant since there is read modify write on CPU registers.

Best Regards

0 Mariana over 16 years ago

Hi Greg,

You can see the drivers that are re-entrant at the document:

C:\Program Files\Texas Instruments\pspdrivers_xx_xx_xx\docs\C6747\C6747_BIOSPSP_Datasheet.pdf

After you install the PSP (if you installed in the default directory).

The GPIO driver is not listed as re-entrant.

0 Greg Konopko over 16 years ago in reply to Mariana

Hi Mariana

Indeed You right. I was looking this information in userguide.

Is any recommended way for wrapper to GPIO API to make it re-entrant?

Wrapping by pushing and poping GIE should be enough I suppose?

Best Regards

0 Mariana over 16 years ago in reply to Greg Konopko

You can try using:

old = HWI_disable();

'do some critical operation'

HWI_restore(old);

Please see page 218 of the TMS320C6000 DSP/BIOS 5.32 Application Programming Interface (API) Ref Guide

Processors forum