RTOS/PROCESSOR-SDK-OMAPL138: Weird behaviour in SPI Interrupt transaction with sysbios

Bhargavi Ale

Part Number: PROCESSOR-SDK-OMAPL138
Other Parts Discussed in Thread: OMAPL138

Tool/software: TI-RTOS

Hi All,

I am working on omapl138 LCDK platform. I have an issue with spi interrupt transaction from long time and already posted with thread but it was not resolved. Meantime I was configured spi in polling mode and continued with my work. Now, I have to use spi in interrupt mode.

As I observed previously, Tx interrupt getting faster than Rx interrupt and spi_object is as follows

As, I observed always writeCountIdx is 0 and readCountIdx is dynamic value and both Tx and Rx buf values are also not same. I'm unable to figure out reason for this.

Is anyone faced similar issue or any suggestion on this behavior?

Thanks & Regards,

Bhargavi Ale.

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

This has been forwarded to the corresponding expert. However, response will be delayed, because he is OoO.

Best Regards,
Yordan

0 Sahin Okur over 6 years ago

TI__Mastermind 27355 points

Hello,

I'm sorry for the delay. Can you please zip up your project and post it here so I can take a closer look on my board here?

Regards,
Sahin

0 Bhargavi Ale over 6 years ago in reply to Sahin Okur

Intellectual 310 points

Hi Sahin,

Please follow project attachment and help me to get out of this issue as soon as possible.

spiInterrupt.zip

Waiting for response.

Thanks & Regards,

Bhargavi Ale.

0 Bhargavi Ale over 6 years ago in reply to Bhargavi Ale

Intellectual 310 points

Waiting for inputs...

Thanks & Regards,

Bhargavi Ale.

0 Sahin Okur over 6 years ago in reply to Bhargavi Ale

TI__Mastermind 27355 points

Hello Bhargavi,

I believe you also need to add "spiParams.transferMode=SPI_MODE_BLOCKING" after the SPI_Params_init() call for interrupt mode. Can you please try this and let me know how it goes?

Regards,
Sahin

0 Sahin Okur over 6 years ago in reply to Sahin Okur

TI__Mastermind 27355 points

Also, it looks like there was a bug with SPI interrupt mode that was resolved in PRSDK v5.0. Please make sure you are at least using this version.

Regards,
Sahin

0 Bhargavi Ale over 6 years ago in reply to Sahin Okur

Intellectual 310 points

Hi Sahin,

I'm using same sdk which you have mentioned i.e., ti-processor-sdk-rtos-omapl138-lcdk-05.00.00.15-Windows-x86-Install.exe and spiParams.transferMode=SPI_MODE_BLOCKING is the default configuration.

And I have tried with latest sdk also, but no luck, I think here also the bug present.

Thanks & Regards,

Bhargavi Ale.

0 Sahin Okur over 6 years ago in reply to Bhargavi Ale

TI__Mastermind 27355 points

Hello Bhargavi,

I was able to reproduce this issue on my end. I have submitted a bug ticket to the development team. I will post a reply here once I have an update.

Thanks,
Sahin

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RTOS/PROCESSOR-SDK-OMAPL138: Weird behaviour in SPI Interrupt transaction with sysbios