W5100 FFFF Lockup | WIZnet Makers

baysidewilly · 2024-10-26T02:16:42+09:00

I've unsuccessfully scoured the net, this forum, and the Arduino forums for someone experiencing the same problem so, I'll try posting here. Equipment: Digilent ArtyS7 with Arduino W5100 Ethernet shield Environment: ArtyS7 powered with 12V/1.5A supply, JTAG'd via USB. Private network with null cat 5 cable between a laptop and the shield - no other network traffic. The shield communicates with the W5100 via SPI. Data: ArtyS7 serves a single, static HTML page (450 bytes) via the shield. Page contains a 10s refresh tag. Setup: Per the W5100 datasheet 5.1 Initialization, all IP/GW/Subnet registers are set as well as Rx/Tx 2K buffers. Observation: After a random number of page refreshes, S0_TX_WR register is the first to report 0xFFFF. After this occurs, only a power down/up of the shield will return it to operational status. Details: When working correctly, all page serves display correctly in the browser - no unexpected data/gibberish. TX buffer is written to per the masking algorithm defined in the data sheet. Writes exceeding the 2K buffer boundary are wrapped to the beginning of the buffer address space. The TX buffer read and write pointers match after a SEND is executed. S0_TX_WR register is incremented by the HTML page size before each SEND is executed. Error: The S0_TX_WR register has been observed to contain 0xFFFF both prior and after an attempted update. This occurrence seems completely random - I have never gotten beyond 150 page refreshes without a failure. Below is a logging snippet from a previous occurrence. Iteration 48 performed correctly, 49 experienced the failure. 48: Socket received RCV, CONNECT irData:0x5 48: main(): readSocket(48) 48: readSocket() rxSz: 0x16B rxRrBaseAddr: 0x0 48: readSocket() gOffSet: 0x0 rxSz: 0x16B 48: readSocket() rxRrBaseAddr: 0x0 += rxSz: 0x16B = 0x16B 48: readSocket() writing RD ptr: 0x16B 48: readSocket(): data:0xF042400 S0_TX_WR0 before S0_CR_RECEIVE txWrPtrAddr:0x8E00 48: readSocket(): data:0xF042500 S0_TX_WR1 before S0_CR_RECEIVE txWrPtrAddr:0x8E9C 48: readSocket(): data:0xF042400 S0_TX_WR0 after S0_CR_RECEIVE txWrPtrAddr:0x8E00 48: readSocket(): data:0xF042500 S0_TX_WR1 after S0_CR_RECEIVE txWrPtrAddr:0x8E9C 48: readSocket() rcvStr: ***GET / HTTP/1.1 Host: 192.168.3.251 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:125.0) Gecko/20100101 Firefox/125.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Connection: keep-alive Upgrade-Insecure-Requests: 1 Cache-Control: max-age=0 *** 48: main(): writeSocket(48) 48: TX socket free size: 0x800 48: pageLoadCnt:48 sendStrSz: 0x1C4 48: txWrPtrAddr: 0x8E9C txRrPtrAddr: 0x8E9C 48: gOffSet: 0x69C + sendStrSz: 0x1C4 = 2144 upperSize: 0x164 48: overflow idx: 355 writing: 0x3A to: 0x47FF 48: wrapping gSO_TX_ADDR: 0x469C gS0_TX_BASE: 0x4000 48: overflow idx: 451 writing: 0x3E to: 0x405F 48: txWrPtrAddr: 0x8E9C += sendStrSz: 0x1C4 = 0x9060 48: writeSocket()…

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