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ZigBee串口接收缓存(HAL_UART_DMA_RX_MAX)设置为512,但是一次性接收400个字节会出现严重丢包问题,使用的是DMA方式,有知道怎么解决的吗?

ZigBee串口接收缓存(HAL_UART_DMA_RX_MAX)设置为512,但是一次性接收400个字节会出现严重丢包问题,使用的是DMA方式,有知道怎么解决的吗?