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C6748使用的lwip1.3.2,程序总死在sitaraif.c文件sitaraif_tx_inthandler(struct netif *netif) 方法中



C6748使用的lwip1.3.2协议栈,程序总死在

sitaraif.c文件void sitaraif_tx_inthandler(struct netif *netif) 方法中:
/* Make sure that the transmission is over */
while((curr_bd->flags_pktlen & EMAC_BUF_DESC_OWNER)
== EMAC_BUF_DESC_OWNER);
,使用的是lwip1.3.2,请问可能是什么原因?