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(void)memset(dmaCfg.rxBuf, (DMA_PAD ^ 0xFF), HAL_UART_DMA_RX_MAX*2);
这段话到底是什么意思呢？我看到前面有一段说明，但并不清楚他讲的是什么。。。请大家帮忙解释下。。谢谢了
很明显是初始化BUF
我知道是初始化，但是不知道为什么这样初始化？
