Lpspi_Half_Duplex example code for S32K344/358

[abdul_rahman]

Hi team,

I'm very new to this controller and I need help in seeing the RxSlaveBuffer data in the Lpspi_Half_Duplex example code given in the IDE. The screenshots of the issues I'm facing are shown below,

The RxSlaveBuffer array isn't receiving data from TxMasterBuffer but it is showing the exact hex, dec, bin values of the master.

I'm not understanding the errors in the Expressions tab of Debug mode. 

It would be really helpful in helping me with detailed explanation of the problems and solutions needed. 

S32DS-S32PLATFORM S32K344-WB #S32K358 #Lpspi_HalfDuplex

[abdul_rahman]

Hi @Julián_AragónM 

Can you help me in this also? The entire problem I've explained in the whole query thread. Let me know if you need anything more to understand the problem.

[Julián_AragónM]

Hi @abdul_rahman,

As my colleague @VaneB has shared in the previous replies, it seems this is a hardware issue related to your board, since we are unable to reproduce it. That specific header or pin may be damaged. It is very difficult to pinpoint a hardware issue through this support channel, so it may be best to contact your distributor or salesperson.

Unfortunately, the only general guidelines I can give you is to follow the Getting Started with the S32K3X4EVB-T172 Evaluation Board and check all the configured jumpers and to confirm if the correct supply voltage and current is being used. You may also try and configure another board or MCU to discard a faulty product.

If possible, it would be helpful to provide a picture where you show the full connections between the pins, so we can discard the connections as a probable cause.

Also, it seems that the S32K3X4EVB-T172-HW-UM is indeed wrong. J10 is not the VDD_HV_A jumper for the S32K344, it is jumper J427:

I apologize for the inconveniences. 

Best regards,
Julián

[VaneB]

Hi @abdul_rahman 

Which version of RTD are you using? Did you make any changes to the example code? Are you using a custom board or an EVB?

BR, VaneB

[abdul_rahman]

Hi @VaneB 

Which version of RTD are you using? Version 4

Did you make any changes to the example code? No

Are you using a custom board or an EVB? I'm running the code in evaluation board S32K3X4EVB

Can we personal chat on this?

[VaneB]

Hi @abdul_rahman 

What is the maskset of the MCU? 0P55A pre-prodution or  1P55A production. There seems to be an issue with the PTB3 0P55A 172HDQFP pin.

[abdul_rahman]

Hi @VaneB 

How do I see this maskset in the S32DS IDE? What does a maskset mean? Why is it important in pin configuration?

[VaneB]

Hi @abdul_rahman 

The mask set is identified by a 5-character code consisting of a version number, a letter, two numerical digits, and a letter. This is printed in the MCU.

[abdul_rahman]

Hi @VaneB 

Please reply to this. I really need your help as no one around me knows about the controller, let alone operating it!!

P.S.- The master clock (PTB29) and CS (PTB25) pins are showing a continuous pulse of 3.3V when seen on the oscilloscope. Why is the clock pin not working?

[VaneB]

Hi @abdul_rahman 

I have tested the example code from my side and it works as expected, make sure you have connected the master and slave pins as mentioned in the description.txt file.

[abdul_rahman]

Hi @VaneB 

I have connected the pins according to the description.txt file as well as from the pins tool. What else could be the problem?? Is it because I'm observing the RxSlave array when I "suspend" the program??

I'm also observing constant DC voltage of 3.3V in the Master's CLK and CS pins. What could this mean??

[VaneB]

Hi @abdul_rahman 

Could you clarify where in the code you "suspend" the program?

[abdul_rahman]

Hi @VaneB 

Have you looked into the screen recording video? What could be the issue during debugging the code?

[VaneB]

Hi @abdul_rahman 

I do not see any issues while debugging, but as you mentioned, it seems that the slave is not receiving the information from the master. Please use a breakpoint at Exit_Example(Passed) to not let the program terminate and check the buffers. Also, could you share a picture of the three LPSPI signals? Lastly, make sure you have the jumper set correctly.

[abdul_rahman]

Hi @VaneB 

"Please use a breakpoint at Exit_Example(Passed) to not let the program terminate and check the buffers.": I have attached a video in a .zip file to show how I've run the program. The master data is still not seen in the slave buffer as shown in the video. What could be the problem now?

"Also, could you share a picture of the three LPSPI signals?": The CLK, CS and data pins are showing the same 3.3 V as shown in the below picture. 

[VaneB]

Hi @abdul_rahman 

Sorry for the inconvenience, as I have not been able to reproduce your problem, I would like to confirm one thing.

PTB3 has output to two ARDUINO headers, J38.18 (DNP) and J37.14, did you connect a jumper from PTE0 (J37.9) to J37.14 or J38.18?

[abdul_rahman]

Hi @VaneB 

I am aware that PTB3 has 2 arduino ports. I've tried connecting both ports. But none of them give the SPI data.

[VaneB]

Hi @abdul_rahman 

Could you create a simple example code where you configure all the pins used for the Lpspi_Half_Duplex example as GPIO and toggle their state from high to low? I want to check if there is any issue in the functionality of any of the pins that does not allow the example to work correctly.

[abdul_rahman]

Hi @VaneB 

I made a new code toggling the gpio pins, which I have attached below. The waveforms of the all the pins used in the Lpspi_Half_Duplex code are also attached below. PTB3 pin was showing 0V in the scope. Please look into the other pin results and let me know what could be the problem.

[VaneB]

Hi @abdul_rahman 

I have run the code shared above and all signals change from high to low as expected.

Since it is not a software issue, please check your hardware like connections or if you see anything strange on your board.

[abdul_rahman]

Hi @VaneB 

As per the user manual of the S32K3X4EVB-T172 evaluation board, the J10 jumper is said as,

But my evaluation board doesn't have the J10 jumper as shown in the below picture,

Is this strange according to you? I have operated the board throughout without this J10 jumper and I didn't face any problem.