Espressif ESP32-S2 - Page 1119

Chapter 2. API Reference
CONFIG_ETH_SPI_ETHERNET_W5500
Use W5500 (MAC RAW)
Found in: Component config > Ethernet > CONFIG_ETH_USE_SPI_ETHERNET
W5500 is a HW TCP/IP embedded Ethernet controller. TCP/IP stack, 10/100 Ethernet MAC and
PHY are embedded in a single chip. However the driver in ESP-IDF only enables the RAW MAC
mode, making it compatible with the software TCP/IP stack. Say yes to enable W5500 driver.
CONFIG_ETH_SPI_ETHERNET_KSZ8851SNL
Use KSZ8851SNL
Found in: Component config > Ethernet > CONFIG_ETH_USE_SPI_ETHERNET
The KSZ8851SNL is a single-chip Fast Ethernet controller consisting of a 10/100 physical layer
transceiver (PHY), a MAC, and a Serial Peripheral Interface (SPI). Select this to enable KSZ8851SNL
driver.
CONFIG_ETH_USE_OPENETH
Support OpenCores Ethernet MAC (for use with QEMU)
Found in: Component config > Ethernet
OpenCores Ethernet MAC driver can be used when an ESP-IDF application is executed in QEMU. This
driver is not supported when running on a real chip.
Default value:
• No (disabled)
Contains:
• CONFIG_ETH_OPENETH_DMA_RX_BUFFER_NUM
• CONFIG_ETH_OPENETH_DMA_TX_BUFFER_NUM
CONFIG_ETH_OPENETH_DMA_RX_BUFFER_NUM
Number of Ethernet DMA Rx buffers
Found in: Component config > Ethernet > CONFIG_ETH_USE_OPENETH
Number of DMA receive buffers, each buffer is 1600 bytes.
Range:
• from 1 to 64 if CONFIG_ETH_USE_OPENETH
Default value:
• 4 if CONFIG_ETH_USE_OPENETH
CONFIG_ETH_OPENETH_DMA_TX_BUFFER_NUM
Number of Ethernet DMA Tx buffers
Found in: Component config > Ethernet > CONFIG_ETH_USE_OPENETH
Number of DMA transmit buffers, each buffer is 1600 bytes.
Range:
• from 1 to 64 if CONFIG_ETH_USE_OPENETH
Default value:
• 1 if CONFIG_ETH_USE_OPENETH
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