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TMS320C6678: srio的MESSAGE操作中的TXU的priority配置失败

Part Number: TMS320C6678


1.问题1

srio手册中的3.12.2 TX_QUEUE_SCH_INFOx寄存器中的2-1bit为priority,且为只读,无法配置;

CPPI手册中4.2.5.1 TX Channel N Scheduler Configuration Register 中的1-0bit为priority,可写,但描述3为最低优先级;那么怎么才能正确配置这个txu模块中发送message时每个seg的优先级呢?