Teensy 4.1 - W5500 using SPI DMA

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This discussion is a technical discussion on optimization methods to increase throughput of the W5500 Ethernet chip on the Teensy 4.1 board. The main points are summarized in three key points: 1. Problem: Lower-than-expected throughput The user (istrateandrei26) is concerned that while the Teensy 4.1's native Ethernet achieves 90 Mbps, the SPI-connected W5500 is stuck at 16 Mbps. Based on the experience of achieving 43 Mbps on the lower-performance Nucleo board, he wonders if the lack of SPI DMA (Direct Memory Access) is the reason for the slowdown on the Teensy 4.1. 2. Expert Advice (Paul…

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