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esp-idf/components/esp_eth/Kconfig

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menu "Ethernet"
# Invisible item that is enabled if any Ethernet selection is made
config ETH_ENABLED
bool
menuconfig ETH_USE_ESP32_EMAC
depends on SOC_EMAC_SUPPORTED
bool "Support ESP32 internal EMAC controller"
default y
select ETH_ENABLED
help
ESP32 integrates a 10/100M Ethernet MAC controller.
if ETH_USE_ESP32_EMAC
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.
!! Important !! Make sure it is 64B aligned for ESP32P4!
config ETH_DMA_RX_BUFFER_NUM
int "Amount of Ethernet DMA Rx buffers"
range 3 30
default 10 if IDF_TARGET_ESP32
default 20 if IDF_TARGET_ESP32P4 #ESP32P4 has smaller internal Rx FIFO
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 30
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.
if ETH_DMA_RX_BUFFER_NUM > 15
config ETH_SOFT_FLOW_CONTROL
bool "Enable software flow control"
default n
help
Ethernet MAC engine on ESP32 doesn't feature a flow control logic.
The MAC driver can perform a software flow control if you enable this option.
Note that, if the RX buffer number is small, enabling software flow control will
cause obvious performance loss.
endif
config ETH_IRAM_OPTIMIZATION
bool "Enable IRAM optimization"
default n
help
If enabled, functions related to RX/TX are placed into IRAM. It can improve Ethernet throughput.
If disabled, all functions are placed into FLASH.
endif # ETH_USE_ESP32_EMAC
menuconfig ETH_USE_SPI_ETHERNET
bool "Support SPI to Ethernet Module"
default y
select ETH_ENABLED
help
ESP-IDF can also support SPI-Ethernet. Actual chip drivers are available as components in
Component Registry.
menuconfig ETH_USE_OPENETH
bool "Support OpenCores Ethernet MAC (for use with QEMU)"
default n
select ETH_ENABLED
help
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.
if ETH_USE_OPENETH
config ETH_OPENETH_DMA_RX_BUFFER_NUM
int "Number of Ethernet DMA Rx buffers"
range 1 64
default 4
help
Number of DMA receive buffers, each buffer is 1600 bytes.
config ETH_OPENETH_DMA_TX_BUFFER_NUM
int "Number of Ethernet DMA Tx buffers"
range 1 64
default 1
help
Number of DMA transmit buffers, each buffer is 1600 bytes.
endif # ETH_USE_OPENETH
config ETH_TRANSMIT_MUTEX
depends on ETH_ENABLED
bool "Enable Transmit Mutex"
default n
help
Prevents multiple accesses when Ethernet interface is used as shared resource and multiple
functionalities might try to access it at a time.
endmenu