debug K344 with DP83848YB/NOPB

[wangjunxiao]

hi~I am using the example lwip_s32k344 ,referenced the pdf : LWIP_S32K344 DEMO SETUP .I have made the corresponding configuration according to the next image.

but when i debug the project ,it always in this while loop.What could be the possible reasons? see the picture

Additionally，in the pdf LWIP_S32K344 DEMO SETUP there is an important note like:

- Change the S32K344 EVB J30 jumper from 3-4 to 1-2, thus the VDD_HV_B will be changed to 5V, to enhance the ethernet level-shifter stability at RMII 50MHz

However,  we provide 3.3V, would there be any trouble?

Finally, I have attached the sample code I debugged myself. Could you please help me identify the reasons behind my continuous debugging failures？

[PetrS]

Hi,

could you please specify which boards/revisions you are using? 
As far as I know you should ensure to have the VDD_HV_B/Ethernet level-shifter voltage jumper at 5V. to make example running properly.

BR, Petr

[wangjunxiao]

We have designed our own circuit using DP83848YB, and the schematic section is shown in the attached image. We are currently supplying it with 5V and use 50MHZ crystal oscillator, but even after setting it up on the PC side, we are unable to ping the board

Please help me analyze if there are any other reasons causing the network connection issue. thanks

[PetrS]

Hi,

hard to say for custom designed board. You can e.g. try read out PHY registers and check for correct setting and check for status/errors etc.

BR, Petr

[wangjunxiao]

OK thanks.Do you have any example code available that supports the MII interface? If I intend to use the MII interface, please tell me what configurations should be modified in the lwip_s32k344 example code?

[PetrS]

Hi,

attached is some hint doc only.

BR, Petr

[wangjunxiao]

thank you for your suppoort