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change(dma): remove esp_dma_x usage in programming guide
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@ -161,7 +161,6 @@ INPUT = \
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$(PROJECT_PATH)/components/esp_http_server/include/esp_http_server.h \
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$(PROJECT_PATH)/components/esp_https_ota/include/esp_https_ota.h \
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$(PROJECT_PATH)/components/esp_https_server/include/esp_https_server.h \
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$(PROJECT_PATH)/components/esp_hw_support/dma/include/esp_dma_utils.h \
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$(PROJECT_PATH)/components/esp_hw_support/include/esp_clk_tree.h \
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$(PROJECT_PATH)/components/esp_hw_support/include/esp_async_memcpy.h \
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$(PROJECT_PATH)/components/esp_hw_support/include/esp_chip_info.h \
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@ -103,17 +103,6 @@ There is address and size alignment requirement (in bytes) for using :cpp:func:`
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By default, if you specify an unaligned address region, :cpp:func:`esp_cache_msync` will return an :c:macro:`ESP_ERR_INVALID_ARG` error, together with the required alignment.
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Memory Allocation Helper
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------------------------
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cache memory synchronization is usually considered when DMA is involved. ESP-IDF provides an API to do memory allocation that can meet the alignment requirement from both the cache and the DMA.
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- :cpp:func:`esp_dma_capable_malloc`. This API allocates a chunk of memory that meets the alignment requirement from both the cache and the DMA.
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- :cpp:func:`esp_dma_capable_calloc`. This API allocates a chunk of memory that meets the alignment requirement from both the cache and the DMA. The initialized value in the memory is set to zero.
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You can also use :c:macro:`ESP_DMA_MALLOC_FLAG_PSRAM` to allocate from the PSRAM.
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Warning for Address Alignment Requirement
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-----------------------------------------
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@ -140,9 +129,3 @@ API Reference - ESP Msync Driver
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--------------------------------
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.. include-build-file:: inc/esp_cache.inc
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API Reference - ESP DMA Utils
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-----------------------------
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.. include-build-file:: inc/esp_dma_utils.inc
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@ -103,17 +103,6 @@ cache 与内存同步的类型:
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默认情况下,如果指定了非对齐地址区域,则 :cpp:func:`esp_cache_msync` 将报错 :c:macro:`ESP_ERR_INVALID_ARG`,并告知所需的对齐方式。
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内存分配助手
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------------
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在涉及 DMA 时通常会考虑同步 cache 和内存。ESP-IDF 提供了能进行内存分配的 API,可同时满足 cache 和 DMA 的对齐要求。
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- :cpp:func:`esp_dma_capable_malloc`。此 API 可分配一块满足 cache 和 DMA 对齐要求的内存块。
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- :cpp:func:`esp_dma_capable_calloc`。此 API 可分配一块满足 cache 和 DMA 对齐要求的内存块,且内存中的初始化值已设置为零。
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也可以使用 :c:macro:`ESP_DMA_MALLOC_FLAG_PSRAM`, 从 PSRAM 中分配内存。
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有关地址对齐要求的警告
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----------------------
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@ -140,9 +129,3 @@ API 参考 - ESP Msync 驱动程序
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-----------------------------
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.. include-build-file:: inc/esp_cache.inc
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API 参考 - ESP DMA 实用程序
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---------------------------
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.. include-build-file:: inc/esp_dma_utils.inc
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