SPI Unrecoverable Timeout

Cecil

Other Parts Discussed in Thread: ADS1248

Hi,

I have a test project in which I am trying to write to an ADS1248 device via the SPI bus. I am doing this write within a task but I always receive -11 after calling GIO_write. I know GIO_write can be safely applied within the task context since it is a blocking call but I don't understand why it returns -11. I searched the Spi.c and Spi_edma.c files but I couldn't find anywhere where this value is returned. That makes me suspect that the IOM driver is what is returning this error. In the iom.h file this error is defined as

#define IOM_ETIMEOUTUNREC -11 /* Unrecoverable timeout occured */

How is it possible that I receive this error even when I see the data I send on the scope correctly and the breakpoint I set in the Spi_localCallbackTransmit function gets hit?

I can send you my project for you to test. Let me know how to do that.

Thanks

over 13 years ago

0 David Friedland over 13 years ago

TI__Mastermind 18320 points

Cecil,

What version of BIOS are you using?

Are you using the PSP library? If so, which version?

0 Cecil over 13 years ago in reply to David Friedland

Intellectual 345 points

Hi David,

I'm using BIOS 5.41.09.34 and psp driver 1.30.01

0 David Friedland over 13 years ago in reply to Cecil

TI__Mastermind 18320 points

OK, I'll get the PSP team to respond to you directly.

0 Cecil over 13 years ago in reply to David Friedland

Intellectual 345 points

Is there anyone on this forum who can take this issue up?

I haven't heard anything yet.

0 Raghavendra Maddikery over 13 years ago in reply to David Friedland

TI__Expert 5500 points

Hi Cecil,

Apologies for delayed response..

Yes, the "IOM_ETIMEOUTUNREC" is returned from the GIO layer(refer gio_sbmt.c file) of BIOS

This can happen only when you have provided a 'timeout' value during channel creation - GIO_create(..)

Just ensure the the timeout parameter of "GIO_Attrs" is set to SYS_FOREVER before calling GIO_create(..) i.e, before channel creation since you are using a blocking call - GIO_write(..). Else, you can even try by increasing the timeout value.

Please verify this and let us know the results..

Thanks & regards,

Raghavendra

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SPI Unrecoverable Timeout