BF538SPORT口的问题，求教 void, 会同

yyc7090

当写入pSPORT1_TFSDIV的时候，TX和RX会同时发生改变，但是中断中再写入TX的时候，就写不进去了。代码如下，求大神指点迷津
void Init_BF538(void)
{
*pSIC_IWR |= 0x1;
*pPLL_CTL = SET_MSEL(20);
idle();
*pPLL_DIV = SET_SSEL(4);
ssync();
*pVR_CTL = 0x00DB;
ssync();
*pEBIU_AMBCTL0 = 0xFFC2FFC2;
*pEBIU_AMBCTL1 = 0xFFC2FFC2;
*pEBIU_AMGCTL = 0x00ff;
ssync();
*pEBIU_SDRRC = 0x074A; //0x03A3;
*pEBIU_SDBCTL = 0x0013; //0x0025;
*pEBIU_SDGCTL = 0x8091998d;//0x998D0491；
ssync();

}
void Init_SPORT1(void)
{
*pSIC_IAR0 = 0xffffffff;
*pSIC_IAR1 = 0xfff2ffff;
*pSIC_IAR2 = 0xffffffff;
register_handler(ik_ivg9, SPORT1TX_ISR);

*pSIC_IMASK = 0x00001000;
*pSPORT1_TCR1 |=IRFS|RFSR|IRCLK;
*pSPORT1_TCR2 = 31;
*pSPORT1_TCLKDIV = 7;
*pSPORT1_TFSDIV = 9;
}
EX_INTERRUPT_HANDLER(SPORT1TX_ISR)
{
if( *pSPORT1_STAT & TXHRE )
{
*pSPORT1_TX =0x7865;
}
}
main()
{
Init_BF538();
Init_SPORT1();
*pSPORT1_TCR1 = (*pSPORT1_TCR1|TSPEN);
while(1);
}

TLP291

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