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@@ -28,7 +28,12 @@
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// #define CONFIG_USB_DCACHE_ENABLE
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-/* attribute data into no cache ram */
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+/* attribute data into no cache ram
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+* DRAM_DMA_ALIGNED_ATTR was introduced in IDF 5.3. If not defined, it falls back to DMA_ATTR
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+*/
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+#ifndef DRAM_DMA_ALIGNED_ATTR
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+#define DRAM_DMA_ALIGNED_ATTR DMA_ATTR
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+#endif
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#define USB_NOCACHE_RAM_SECTION DRAM_DMA_ALIGNED_ATTR
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/* use usb_memcpy default for high performance but cost more flash memory.
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LiPeng