W5300 debugging UDP communication, sending data is normal, receiving data loss highest, STM32F767 W5300 chips, on the other side of PC network debugging assistant, adopts the model of 8 bits of data, send 0 XFF or 0 xaa STM32, PC network debugging assistants can receive 0 XFF or 0 xaa, but the network debugging assistant send 0 XFF or 0 xaa, STM32 from W5300 SnRXFIFOR read is 0 x7f x2a or 0,
STM32 from W5300 read other registers, can also be normal read out the correct data, such as reading a subnet mask is set to 0 XFF; Read is 0 XFF.
A great god help have a look at: application in the cloud, to extract the code: 1111; https://pan.baidu.com/s/1i9ymYSva6f4fn6ssCPa1qg