esp-idf/components/esp_eth/Kconfig

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menu "Ethernet"
menuconfig ETH_USE_ESP32_EMAC
depends on IDF_TARGET_ESP32
bool "Support ESP32 internal EMAC controller"
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default y
help
ESP32 integrates a 10/100M Ethernet MAC controller.
if ETH_USE_ESP32_EMAC
choice ETH_PHY_INTERFACE
prompt "PHY interface"
default ETH_PHY_INTERFACE_RMII
help
Select the communication interface between MAC and PHY chip.
config ETH_PHY_INTERFACE_RMII
bool "Reduced Media Independent Interface (RMII)"
config ETH_PHY_INTERFACE_MII
bool "Media Independent Interface (MII)"
endchoice
if ETH_PHY_INTERFACE_RMII
choice ETH_RMII_CLK_MODE
prompt "RMII clock mode"
default ETH_RMII_CLK_INPUT
help
Select external or internal RMII clock.
config ETH_RMII_CLK_INPUT
bool "Input RMII clock from external"
help
MAC will get RMII clock from outside.
Note that ESP32 only supports GPIO0 to input the RMII clock.
config ETH_RMII_CLK_OUTPUT
bool "Output RMII clock from internal"
help
ESP32 can generate RMII clock by internal APLL.
This clock can be routed to the external PHY device.
ESP32 supports to route the RMII clock to GPIO0/16/17.
endchoice
endif
if ETH_RMII_CLK_INPUT
config ETH_RMII_CLK_IN_GPIO
int
range 0 0
default 0
help
ESP32 only supports GPIO0 to input the RMII clock.
endif
if ETH_RMII_CLK_OUTPUT
config ETH_RMII_CLK_OUTPUT_GPIO0
bool "Output RMII clock from GPIO0 (Experimental!)"
default n
help
GPIO0 can be set to output a pre-divided PLL clock (test only!).
Enabling this option will configure GPIO0 to output a 50MHz clock.
In fact this clock doesn't have directly relationship with EMAC peripheral.
Sometimes this clock won't work well with your PHY chip. You might need to
add some extra devices after GPIO0 (e.g. inverter).
Note that outputting RMII clock on GPIO0 is an experimental practice.
If you want the Ethernet to work with WiFi, don't select GPIO0 output mode for stability.
if !ETH_RMII_CLK_OUTPUT_GPIO0
config ETH_RMII_CLK_OUT_GPIO
int "RMII clock GPIO number"
range 16 17
default 17
help
Set the GPIO number to output RMII Clock.
endif
endif
config ETH_SMI_MDC_GPIO
int "SMI MDC GPIO number"
default 23
range 0 33
help
Set the GPIO number used by SMI MDC.
config ETH_SMI_MDIO_GPIO
int "SMI MDIO GPIO number"
default 18
range 0 33
help
Set the GPIO number used by SMI MDIO.
config ETH_PHY_USE_RST
bool "Use Reset Pin of PHY Chip"
default y
help
Set this option to true if you want to control PHY chip's reset using a GPIO.
Check the schematic of you board to make sure if it's necessary to use this feature.
if ETH_PHY_USE_RST
config ETH_PHY_RST_GPIO
int "PHY RST GPIO number"
default 5
range 0 33
help
Set the GPIO number used by the PHY chip's RST pin.
endif
config ETH_DMA_BUFFER_SIZE
int "Ethernet DMA buffer size (Byte)"
range 256 1600
default 512
help
Set the size of each buffer used by Ethernet MAC DMA.
config ETH_DMA_RX_BUFFER_NUM
int "Amount of Ethernet DMA Rx buffers"
range 3 20
default 10
help
Number of DMA receive buffers. Each buffer's size is ETH_DMA_BUFFER_SIZE.
Larger number of buffers could increase throughput somehow.
config ETH_DMA_TX_BUFFER_NUM
int "Amount of Ethernet DMA Tx buffers"
range 3 20
default 10
help
Number of DMA transmit buffers. Each buffer's size is ETH_DMA_BUFFER_SIZE.
Larger number of buffers could increase throughput somehow.
endif
menuconfig ETH_USE_SPI_ETHERNET
bool "Support SPI to Ethernet Module"
default y
help
ESP-IDF can also support some SPI-Ethernet module.
if ETH_USE_SPI_ETHERNET
menuconfig ETH_SPI_ETHERNET_DM9051
bool "Use DM9051"
default y
help
DM9051 is a fast Ethernet controller with an SPI interface.
It's also integrated with a 10/100M PHY and MAC.
Set true to enable DM9051 driver.
if ETH_SPI_ETHERNET_DM9051
config ETH_DM9051_INT_GPIO
int "DM9051 Interrupt GPIO number"
default 4
range 0 33
help
Set the GPIO number used by DM9051's Interrupt pin.
endif
endif
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endmenu