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Graduate
December 10, 2025
Question

STM32H743 Ethernet Debugging - PHY Link Status, Bandwidth Testing, Link Drop Detection.

  • December 10, 2025
  • 0 replies
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Hello ST Team,

I'm implementing robust Ethernet on STM32H743ZI. Need technical guidance on:

PART 1: BANDWIDTH VERIFICATION

Question 1.1: How to verify link speed?

How to check link speed (100 Mbps)?


Question 1.2: Bandwidth testing methodology?

Create a TCP socket, send a large file to the PC?
Expected bandwidth on STM32H743?
Network overhead (TCP/IP stack)?
Optimal packet size for testing?  Also, how can I debug this to check if I am using full bandwidth and if my link is down during transmission?

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