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freertos: Fix CONFIG_SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY description

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This commit fixes the ambiguity in the description of the
SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY configuration option.
This commit is contained in:
Darian Leung 2021-05-26 21:04:28 +08:00
parent 36e6938920
commit 787873b86b
1 changed files with 5 additions and 4 deletions
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9
components/esp32/Kconfig
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@ -208,10 +208,11 @@ menu "ESP32-specific"
help
Because some bits of the ESP32 code environment cannot be recompiled with the cache workaround,
normally tasks cannot be safely run with their stack residing in external memory; for this reason
xTaskCreate and friends always allocate stack in internal memory and xTaskCreateStatic will check if
the memory passed to it is in internal memory. If you have a task that needs a large amount of stack
and does not call on ROM code in any way (no direct calls, but also no Bluetooth/WiFi), you can try to
disable this and use xTaskCreateStatic to create the tasks stack in external memory.
xTaskCreate (and related task creaton functions) always allocate stack in internal memory and
xTaskCreateStatic will check if the memory passed to it is in internal memory. If you have a task that
needs a large amount of stack and does not call on ROM code in any way (no direct calls, but also no
Bluetooth/WiFi), you can try enable this to cause xTaskCreateStatic to allow tasks stack in external
memory.
choice SPIRAM_OCCUPY_SPI_HOST
prompt "SPI host to use for 32MBit PSRAM"