Communication issue between S32K144, MC33771C and the transceiver MC33664

[adrimen3668]

Hi, we are working with the MC33771C, s32k144 and the transceiver MC33664C and we have an issue.

We are using the example project "BCC_S32K144_Monitoring".

The problem occurs in the function "BCC_AssignCid".

When the instruction "status = BCC_Reg_Read(drvConfig, BCC_CID_UNASSIG, MC33771C_INIT_OFFSET, 1U, &readVal);" run, the status give us a "BCC_STATUS_COM_TIMEOUT" because the slave does not recieves response from the MC33771C. 

We capture the spi frame in the 'BCC_Reg_Read' in the "BCC_AssignCid" function and we notice that the master data output of the master does not end at '1'. We do not know if this matters..

The green signal is the master clock and the yellow is the master master data output. 

Here, the green signal is the master chip select and the yellow is the master master data output.

Here, the green signal is the serial data input of the slave and the yellow is de serial data output of the master.

The signal recieved in the slave was sent by the transceiver MC33664.

We test the tpl signals of the transceiver MC33664 and works well.

Clarifications:

1. The function BCC_SoftwareReset correctly send the spi frame.

The yellow is the master data output and the green is the slave data input.

2. We have correctly powered the board at 42.1 volts.

3.We are working on tpl mode.

Thanks in advance.

[Q_man]

Could you also send a picture showing the MC33771C marking?

[adrimen3668]

Hi.

We do not know what you mean by marking.

Could you explain it to us?

[Q_man]

Just a photo of the MC33771C, such that I can read whats written on it.

[adrimen3668]

Hi, the marking is MC33771CTP1AE CTHW2248A.

[adrimen3668]

Thanks for the answer.

The CSB in the point 1.2 is sent by the BCC_S32K144_Monitoring?

I will try the other points.

Thanks in advance.

[TomasVaverka]

Hi Adrián,

Apologies for the delay, this issue is still being reviewed by our BMS SW experts. I suppose you will get an advice later today or at the beginning of next week.

Best regards,

Tomas

[adrimen3668]

Hi Tomas,

Thanks for the answer.

I am waiting for the final answer.

Thanks in advance.