TMS320F280039C: sequence of interrupt is wrong

Angela Zou

Tool/software:

Dear expert,

I use F280039C as slave, when I transfer the slave state from receive to send, I found that the transmit data ready interrupt is triggered first, then trigger the accessed as slave interrupt. But after i sent the first package data, the interrupt sequence become correct. Could you help find the root cause? Another question is how to clear XRDY manually?

11 months ago

0 Aishwarya Rajesh 11 months ago

TI__Mastermind 20225 points

Hi Angela,

Please allow me to take a look at this and get back to you by the end of the week. In the meantime, if you can provide screenshots of the relevant ePIE and SPI interrupt registers, that would be helpful.

Best Regards,

Aishwarya

0 Angela Zou 11 months ago in reply to Aishwarya Rajesh

TI__Intellectual 1095 points

Hi Aishwarya,

Sorry for missing the information, it is I2C issue, not SPI.

0 Aishwarya Rajesh 11 months ago

TI__Mastermind 20225 points

Angela,

Understood, would you still be able to provide a snippet of the registers in CCS? I'd like to see if there are any other factors affecting this issue.

Best Regards,

Aishwarya

0 Angela Zou 11 months ago in reply to Aishwarya Rajesh

TI__Intellectual 1095 points

Hi Aishwarya,

I will send you the details and the project which could reproduce the issue through email.

0 Aishwarya Rajesh 11 months ago

TI__Mastermind 20225 points

Angela,

Thank you for sending. The XRDY flag seems to be set after initial I2C module reset, so I would recommend clearing all interrupts and interrupts flags after configuring the I2C module and before enabling I2C interrupts as shown in the SW examples. This should solve this issue.

XRDY can be manually cleared using the I2C_clearInterruptStatus() and I2C_clearStatus() functions.

Best Regards,

Aishwarya

+1 Aishwarya Rajesh 10 months ago

TI__Mastermind 20225 points

Angela,

Checking in to see if you have been able to resolve the issue and if you have any other questions. In addition, if this thread helped resolve the issue, please mark this thread as resolved, thank you.

Best Regards,

Aishwarya

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TMS320F280039C: sequence of interrupt is wrong