Tool/software: Starterware
Hi expert,
I see the e2e topic about how to resume the AM335x CPSW after the DMA RX host error as follows:
I want to get a confirmation that if there is just one way that give a warm reset to the system to resume the AM335x CPSW ?
Hello Jian Zhou,
You can't resume DMA operations after CPDMA host error. Host error interrupt is mostly for software debug purpose to rectify cause of error.
Software should always make sure to have enough buffer descriptors submitted to DMA and not to submit buffer descriptors to DMA when ownership bit is still with software.
In case where not enough b.d's are available, software should close link (set next b.d address to 0x0 and clear ownership bits for b.ds). It should never submit bd with ownership bit set to sw.
