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TMS320F280023C: If printf () is inserted in the program, I2C communication may not be performed normally

Conor
Mastermind 9200 points
Part Number: TMS320F280023C

Hi,

If printf () is inserted in the program, I2C communication may not be performed normally.

If I add printf () after the part that normally works normally, there is a phenomenon that the previous part does not work normally.

If you know anything, please let me know.

Thanks,