W5300 receive is incorrect

Question

Hi I have board with 5300 chip and control with AVR Every thing it’s OK just when I send data from PC to w5300 receiving data and packet size is incorrect. Any body can help me?

Eugeny · Answer

You must give more troubleshooting information about your issue and show the example, what is wrong.

Eugeny · Answer

dehghan: but packet size and data is incorrect Then you most probably read wrong part of the buffer. You do not say which protocol you use - TCP, UDP, IPRAW or MACRAW. Do you know what should you expect in the buffer and where this information must be located? I recommend you study the datasheet and check your code to ensure you do things correctly.

dehghan · Answer

I use TCP two first byte in Rx-FIFO is packet size and other one is data

Eugeny · Answer

I asked for example. Give example of the case when your W5300 receives packet, tell us what is the packet data size sent by the PC, value in RSR after W5300 receives data and value of “byte size of DATA packet” you read from the RX buffer. Also tell us if data following this data size word in RX buffer represents user TCP/IP data sent by the PC.

dehghan · Answer

For example when I send 1 2 3 4 as string I get RSR=6 packet size som time 90 sometimes 180 and data 34 34 34 33 that I should get 49 50 51 52. I should mentioned somtims after power up borad for first send I get correct data but when I repeat send I get wrong data.