# # For a description of the syntax of this configuration file, # see the file kconfig-language.txt in the NuttX tools repository. # if ARCH_BOARD_ESP32_DEVKITC choice prompt "On-board Crystal Frequency" default ESP32_DEVKITC_XTAL_40MZ config ESP32_DEVKITC_XTAL_40MZ bool "40MHz" config ESP32_DEVKITC_XTAL_26MHz bool "26MHz" endchoice # On-board Crystal Frequency config ESP32_DEVKITC_RUN_IRAM bool "Run from IRAM" default n ---help--- The default configuration is set up run from IRAM. However, the current (2016-11-14) OpenOCD for ESP32 does not support writing to FLASH. This option sets up the linker scripts to support execution from IRAM. In this case, OpenOCD can be used to load directly into IRAM. At this stage the nuttx image is small enough to be entirely memory- resident. Once board support is more mature you can add flash cache mapping code to run from SPI flash after initial boot. There are at least two possible approaches you could take: You can add the flash cache mapping code into nuttx directly, so it is self-contained - early nuttx initialization runs from IRAM and enables flash cache, and then off you go. Or you can use the esp-idf software bootloader and partition table scheme and have nuttx be an esp-idf "app" which allows interoperability with the esp-idf system but makes you reliant on the esp-idf design for these parts. Both are possible. source boards/xtensa/esp32/common/Kconfig if PM config PM_ALARM_SEC int "PM_STANDBY delay (seconds)" default 15 depends on PM ---help--- Number of seconds to wait in PM_STANDBY before going to PM_STANDBY mode. config PM_ALARM_NSEC int "PM_STANDBY delay (nanoseconds)" default 0 depends on PM ---help--- Number of additional nanoseconds to wait in PM_STANDBY before going to PM_STANDBY mode. config PM_SLEEP_WAKEUP_SEC int "PM_SLEEP delay (seconds)" default 20 depends on PM ---help--- Number of seconds to wait in PM_SLEEP. config PM_SLEEP_WAKEUP_NSEC int "PM_SLEEP delay (nanoseconds)" default 0 depends on PM ---help--- Number of additional nanoseconds to wait in PM_SLEEP. endif # PM if ESP32_SPIRAM menu "PSRAM clock and cs IO for ESP32-DOWD" config D0WD_PSRAM_CLK_IO int "PSRAM CLK IO number" range 0 33 default 17 help The PSRAM CLOCK IO can be any unused GPIO, user can config it based on hardware design. If user use 1.8V flash and 1.8V psram, this value can only be one of 6, 7, 8, 9, 10, 11, 16, 17. config D0WD_PSRAM_CS_IO int "PSRAM CS IO number" range 0 33 default 16 help The PSRAM CS IO can be any unused GPIO, user can config it based on hardware design. If user use 1.8V flash and 1.8V psram, this value can only be one of 6, 7, 8, 9, 10, 11, 16, 17. endmenu menu "PSRAM clock and cs IO for ESP32-D2WD" config D2WD_PSRAM_CLK_IO int "PSRAM CLK IO number" range 0 33 default 9 help User can config it based on hardware design. For ESP32-D2WD chip, the psram can only be 1.8V psram, so this value can only be one of 6, 7, 8, 9, 10, 11, 16, 17. config D2WD_PSRAM_CS_IO int "PSRAM CS IO number" range 0 33 default 10 help User can config it based on hardware design. For ESP32-D2WD chip, the psram can only be 1.8V psram, so this value can only be one of 6, 7, 8, 9, 10, 11, 16, 17. endmenu menu "PSRAM clock and cs IO for ESP32-PICO" config PICO_PSRAM_CS_IO int "PSRAM CS IO number" range 0 33 default 10 help The PSRAM CS IO can be any unused GPIO, user can config it based on hardware design. For ESP32-PICO chip, the psram share clock with flash, so user do not need to configure the clock IO. For the reference hardware design, please refer to https://www.espressif.com/sites/default/files/documentation/esp32-pico-d4_datasheet_en.pdf endmenu config ESP32_SPIRAM_SPIWP_SD3_PIN int "SPI PSRAM WP(SD3) Pin when customising pins via eFuse (read help)" range 0 33 default 7 help This value is ignored unless flash mode is set to DIO or DOUT and the SPI flash pins have been overridden by setting the eFuses SPI_PAD_CONFIG_xxx. When this is the case, the eFuse config only defines 3 of the 4 Quad I/O data pins. The WP pin (aka ESP32 pin "SD_DATA_3" or SPI flash pin "IO2") is not specified in eFuse. And the psram only has QPI mode, the WP pin is necessary, so we need to configure this value here. When flash mode is set to QIO or QOUT, the PSRAM WP pin will be set as the value configured in bootloader. For ESP32-PICO chip, the default value of this config should be 7. endif # ESP32_PSRAM endif # ARCH_BOARD_ESP32_DEVKITC