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Merge branch 'clarification_on_rtc_fast' into 'master'
docs: Makes the description for RTC fast as heap explicit See merge request espressif/esp-idf!25103
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acbcdc0487
@ -175,16 +175,16 @@ The ``DRAM_ATTR`` attribute can be used to force constants from DROM into the :r
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.. only:: esp32
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RTC FAST memory can only be accessed by the PRO CPU.
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In single core mode (:ref:`CONFIG_FREERTOS_UNICORE`), remaining RTC FAST memory is added to the heap, unless the option :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` is disabled. This memory can be used interchangeably with :ref:`DRAM`, but is slightly slower to access and not DMA-capable.
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In single core mode, remaining RTC FAST memory is added to the heap unless the option :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` is disabled. This memory can be used interchangeably with :ref:`DRAM`, but is slightly slower to access and not DMA capable.
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This option is not available in dual core mode, because on {IDF_TARGET_NAME}, RTC FAST memory can only be accessed by the PRO CPU.
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.. only:: not esp32
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Remaining RTC FAST memory is added to the heap unless the option :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` is disabled. This memory can be used interchangeably with :ref:`DRAM`, but is slightly slower to access.
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DMA Capable Requirement
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DMA-Capable Requirement
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. highlight:: c
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@ -175,9 +175,9 @@ DROM(数据存储在 flash 中)
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.. only:: esp32
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RTC FAST memory 只可以被 PRO CPU 访问。
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在单核模式下 (:ref:`CONFIG_FREERTOS_UNICORE`),除非禁用 :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` 选项,否则剩余的 RTC FAST memory 会被添加到堆中。该部分内存可以和 :ref:`DRAM` 互换使用,但是访问速度稍慢,且不具备 DMA 功能。
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在单核模式下,除非禁用 :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` 选项,否则剩余的 RTC FAST memory 会被添加到堆中。该部分内存可以和 :ref:`DRAM` 互换使用,但是访问速度稍慢,且不具备 DMA 功能。
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:ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` 选项在双核模式下不可用,因为 {IDF_TARGET_NAME} 的 RTC FAST memory 只能由 PRO CPU 访问。
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.. only:: not esp32
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