TMS320C6678: edma 轮询

您好，在参考pdk_c667x_2_0_16\packages\ti\csl\example\edma下的edm_tset例程，ping-pong传输问题中，对ipr的轮询，其中poll on ipr bit 是根据tcc决定的，这里的0x1和0x2具体是指什么呢？

/* Poll on IPR bit 0 */，
do {
CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
} while (!(regionIntr.intr & 0x1));

/* Clear the pending bit */
CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR,&regionIntr);

/* Trigger Channel */
CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);

/* Poll on IPR bit 2 */
do {
CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
} while (!(regionIntr.intr & 0x2));