PROCESSOR-SDK-AM64X: PROFINET IO Device - IRT sync signals not in sync with data callbacks

Alexander Seidl

Part Number: PROCESSOR-SDK-AM64X
Other Parts Discussed in Thread: TMDS64EVM

Tool/software:

Hi TI Team,

we already had an issue where we mentioned that the Ti and To times did not correlate with callbacks for sending/receiving cyclic data: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1463428/processor-sdk-am64x-understanding-isochronous-profinet-api-4-0-3-irt---timing-pins/5774931?tisearch=e2e-sitesearch&keymatch=profinet%2525252520irt#5774931

The setup is the same as in the original issue. We have 4 PINs we connect to a logic analyzer to see the timing. We have the

2 PINs triggered from stack:
PRG1_IEP0_EDC_SYNC_OUT2
PRG1_IEP0_EDC_SYNC_OUT0

2 PINs manually added:
MCU_SPI0_D1/B6 --> PN_APP_IOD_cbDataWrite
MCU_SPI0_D0/E7 --> PN_APP_IOD_cbDataRead

PLC setup:
Ti @ 250 us interval 125 us
To @ 375 us interval 125 us
Application Cycle: 1 ms
Send clock: 1 ms

We have now tested again with 11.00.00.08 Industrial Communication SDK on our board (TMDS64EVM) and data callbacks PN_APP_IOD_cbDataWrite() and PN_APP_IOD_cbDataRead() are still not in sync with IRT sync signals.
We have defined PN_APP_IOD_TI_TO_MEASURE in example profinet_device_demo_am64x-evm_r5fss0-0_freertos_ti-arm-clang to get meaningful values ti/to cycle times from PLC.