Identification and strict alignment of the tapping equipment.
开孔设备的确认与严格调试。
The problem is that there are unusually strict alignment requirements on data that will be transferred through DMA.
这个问题由于通常通过dma方式传递数据时，会有严格的对齐要求。
Even the alignment guaranteed by malloc may not be strict enough. Variables can be declared using GCC's __attribute__ extension to compel alignment.
即使通过malloc来确保对齐，还是有可能不够严格。
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