由于国庆节假期,帖子审批以及工程师回复将会有所延迟,敬请谅解

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CC3220SF: tcp

Part Number: CC3220SF

建立TCP连接后,调用sl_Send传输若干次后,返回值为-1。之后再尝试发送返回值一直保持为-1。请问这个-1的返回值代表什么?该怎么解决呢?