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SPI TX FiFo is not sending data out

Question asked by christophosterloh on Dec 12, 2018
Latest reply on Dec 14, 2018 by Robin_Shen



I have a problem with the SPI communication concerning the TX FIFO. I try to send 3 words through fifo without waiting active on the TCF flag afterwards, but handle in incoming data when the RX FIFO countains 3 words. So what I have done is to enable the FIFO and write three bytes with push. I have enabled the Interrupt Request Selects for TCF but the ISR is not called. When I have a look with in the registers from Debugger I see that data is not send out, but the Fifo counter is still 3. So is there anything I'm missing why data is kept in fifo in and not sent?


Thanks and best regards!