Hello rjl, I performed a diff on the I2S driver file between 1.2.0-b.1 and 1.2.0 and there are few differences, but it doesn't look like any one of those would affect the functionality. SSP_ERR_NOT_ENABLED is returned by DTC during R_DTC_Enable - have you tried setting your DTC trigger to Event SSI0 TXI? Regarding I2C - please verify that the address and pins are both configured correctly. You may have to copy a linker script over from a blank project for the same board - this is because DTC now uses a dedicated section at the base of RAM to store its own vector table. In case this doesn't help, we'll need some more information to debug your problem. Regards
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