25 Feb
2011
25 Feb
'11
4:32 p.m.
I think you need to implement the PRCM compliant interrupt config to check for McBSP underflow/overflow.
I have implemented the interrupt handle for IRQ 17 for receive error and underflow/overflow. However, the devices are running for 2 days without channel swapped. I will keep them running.
Finally, after 4 days, we caught the problem again. When channel is swapped, the IRQ is trigger with receive underrun (IRQ_STATUS_REG = 0x171e). And, from the status register, the transmit is overflow as well. However, I didn't fill zero to one of the transmit channel, and couldn't tell if the playback is swap as well. Any idea why underun happens, or any suggestion to fix it?
Thanks, Ying