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SRIO例程中的SWRITE & STREAM

大家好 问一下 在STK_C6657包 SRIO例程中

SRIO_Packet_Type packet_type[]=
{
SRIO_PKT_TYPE_SWRITE ,
//SRIO_PKT_TYPE_NWRITE ,
//SRIO_PKT_TYPE_NWRITE_R ,
SRIO_PKT_TYPE_NREAD ,
SRIO_PKT_TYPE9_STREAM ,
SRIO_PKT_TYPE11_MESSAGE
};

SRIO_PKT_TYPE_SWRITE 这是流写操作 

SRIO_PKT_TYPE9_STREAM 这个也是流写操作么???是Data Streaming???这个不是直接IO/DMA 也不是消息传递吧?

和SRIO_PKT_TYPE_SWRITE 有什么区别