TMS320F28377D: cannot use SCI while using SPI

Ben Qin

Intellectual 2690 points

Part Number: TMS320F28377D

Hi Team,

There is an issue from the customer need your help:

Using GPIO 58 59 60 61 as SPI, GPIO 14 15 as SCI, but the SCI cannot work properly.

I tested SPI and SCI separately and both works fine.

This is the project XZ_01_sci_spi.zip. Please help to check it out.

Thanks & Regards,

Ben

over 2 years ago

0 Marlyn Rosales Castaneda20 over 2 years ago

TI__Mastermind 24800 points

Hi Ben,

I suspect this may be an issue with interrupts. Are there SCI and SPI Interrupts in the program? If there are, can you disable the SPI interrupts and see if your SCI is still able to function properly?

SPI Interrupts have higher priority than the SCI interrupts.

Best Regards,

Marlyn

0 Ben Qin over 2 years ago in reply to Marlyn Rosales Castaneda20

TI__Intellectual 2690 points

Hi Marlyn,

I don't use interrupt, both of interrupts are not enabled, and the interrupt vector table are not enabled.

Best Regards,

Ben

0 Ben Qin over 2 years ago in reply to Ben Qin

TI__Intellectual 2690 points

Hi Marlyn,

Customer finds the reason that he opened the high speed SPI clock, and uart clock doesn't match.

Best Regards,

Ben

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TMS320F28377D: cannot use SCI while using SPI