help! MK64 :why ENET_MacSendData stuck in while(ENET->EIR & ENET_EIMR_TXF_MASK); ?

[2321]

Dear Expert
The MCU I am using is MK64FX512XXX12, 

when we use this function ,send eth data for a while, it will stucked in " while(ENET->EIR & ENET_EIMR_TXF_MASK);  ".

无效ENET_MacSendData（uint8_t*数据，uint16_t镜头）

{

    ENET->EIR = ENET_EIMR_TXF_MASK;

    /* check if buffer is readly */

    //while( pxENETTxDescriptor->status & TX_BD_R ) {};

    /* set Tx Descriptor */

pxENETTxDescriptor->data = （uint8_t *）__REV（（uint32_t）data）;

    pxENETTxDescriptor->length = __REVSH(len);

    pxENETTxDescriptor->bdu = 0x00000000;

pxENETTxDescriptor->ebd_status = TX_BD_INT | TX_BD_TS;// | TX_BD_IINS | TX_BD_PINS;

pxENETTxDescriptor->status = ( TX_BD_R | TX_BD_L | TX_BD_TC | TX_BD_W );

    /* enable transmit */

    ENET->TDAR = ENET_TDAR_TDAR_MASK;

    while(ENET->EIR & ENET_EIMR_TXF_MASK);         //   why stuck in this "while" ?

}

we have no idea  why?  isn't  this bit  set or reset by hardware?

This problem has been bothering me for a long time, please help me to solve this problem.
Thanks.

--weilu.

[xiangjun_rong]

Hi,

As the following Fig, the Bit 27 TXF is updated by hardware, the bit is explained as:

"

Transmit Frame Interrupt
Indicates a frame has been transmitted and the last corresponding buffer descriptor has been updated

"

I suppose that the ethernet frame is not transferred, so the bit is not set.

Pls check you code

BR

XiangJun Rong