Autonomous slave, IBI, no MDB, ACK pulse handoff

NXP / i3c-slave-design

MIPI I3C Basic v1.0 communication Slave source code in Verilog with BSD license to support use in sensors and other devices.

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Autonomous slave, IBI, no MDB, ACK pulse handoff #36

Open tsuhuai opened 2 years ago

tsuhuai commented 2 years ago

Hi: Have you ever test the IBI without MDB condition? ENA_IBI_MR_HI = 6'b00_0001;//IBI capable ENA_TIMEC =5'b0_0000;//no Timing control BCR[2]=0;//no MDB

My task pulls the SDA low 20ns before the (ACK) SCL 0->1 transition, and then keep it High-Z for 20ns when SCL is high. However, the slave did handoff.

If I set BCR[2]=1, ENA_IBI_MR_HJ=6'b00_0011 and perform the simulation again, correct ACK handoff take places. DId I miss anything?

pkimelman-nxp commented 2 years ago

Is has been tested in the past, but no user is using it without MDB, so it is possible something got broken. It should release/handoff after the SCL rising edge of the Controller ACK, as you say.

tsuhuai commented 2 years ago

I have modified 'i3c_sdr_slave_engine.v' , and the simulation result is OK.