CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM¶
Max number of WiFi dynamic RX buffers
Type: int
Help¶
Set the number of WiFi dynamic RX buffers, 0 means unlimited RX buffers
will be allocated (provided sufficient free RAM). The size of each dynamic
RX buffer depends on the size of the received data frame.
For each received data frame, the WiFi driver makes a copy to an RX buffer
and then delivers it to the high layer TCP/IP stack. The dynamic RX buffer
is freed after the higher layer has successfully received the data frame.
For some applications, WiFi data frames may be received faster than the
application can process them. In these cases we may run out of memory if
RX buffer number is unlimited (0). If a dynamic RX buffer limit is set,
it should be at least the number of static RX buffers.
Default¶
32
Kconfig definition¶
At <Zephyr>/drivers/wifi/esp32/Kconfig.esp32:55
Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:40 → <Zephyr>/drivers/Kconfig:76 → <Zephyr>/drivers/wifi/Kconfig:36
Menu path: (Top) → Device Drivers → Wi-Fi Drivers → ESP32 SoC WiFi support
config ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM
int "Max number of WiFi dynamic RX buffers"
range 0 128
default 32
depends on WIFI_ESP32 && WIFI
help
Set the number of WiFi dynamic RX buffers, 0 means unlimited RX buffers
will be allocated (provided sufficient free RAM). The size of each dynamic
RX buffer depends on the size of the received data frame.
For each received data frame, the WiFi driver makes a copy to an RX buffer
and then delivers it to the high layer TCP/IP stack. The dynamic RX buffer
is freed after the higher layer has successfully received the data frame.
For some applications, WiFi data frames may be received faster than the
application can process them. In these cases we may run out of memory if
RX buffer number is unlimited (0). If a dynamic RX buffer limit is set,
it should be at least the number of static RX buffers.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)