How to Prevent Receive Data Loss with WIZnet W5500 on MCU Web Servers?
This commercial MCU web-server debugging case analyzes intermittent receive-data loss when using the WIZnet W5500 Ethernet controller.
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How to Prevent Receive Data Loss with WIZnet W5500 on MCU Web Servers? Summary This commercial MCU web-server debugging case analyzes intermittent receive-data loss when using the WIZnet W5500 Ethernet controller. The observed issue appeared during HTTP POST testing: an expected 667-byte request was sometimes read as only 536 bytes. The fix investigated the W5500 socket receive-size register path, especially getSn_RX_RSR(), and added a short stabilization delay before the second register read. W5500’s role is the Ethernet MAC/PHY, hardwired TCP/IP socket engine, and packet buffer interface…
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