求助，关于24189中的SPORT配置为I2S时对chained DMA的使用疑问

在ADI提供例程中却没有将地址分离开来就赋值入寄存器了，具体见下面例程
   

	rcv1a_tcb[4]  = *pCPSP1A = ((int) rcv1a_tcb  + 7)   0x7FFFF | (1<<19);
	rcv1b_tcb[4]  = *pCPSP1B = ((int) rcv1b_tcb  + 7)   0x7FFFF | (1<<19);
	rcv3a_tcb[4]  = *pCPSP3A = ((int) rcv3a_tcb  + 7)   0x7FFFF | (1<<19);
	rcv3b_tcb[4]  = *pCPSP3B = ((int) rcv3b_tcb  + 7)   0x7FFFF | (1<<19);
	xmit0a_tcb[4] = *pCPSP0A = ((int) xmit0a_tcb + 7)   0x7FFFF | (1<<19);
	xmit0b_tcb[4] = *pCPSP0B = ((int) xmit0b_tcb + 7)   0x7FFFF | (1<<19);
	xmit2a_tcb[4] = *pCPSP2A = ((int) xmit2a_tcb + 7)   0x7FFFF | (1<<19);
	xmit2b_tcb[4] = *pCPSP2B = ((int) xmit2b_tcb + 7)   0x7FFFF | (1<<19);

对于这个问题感到很困惑，文档中写的跟例程中不一样，所以不知道各位有没有配置chained DMA的经验讨论一下。其实例程也不稳定，有时会出不来声音，或者是声音失真，出现噪音等问题。