how to check whether a dma channel is free to execute new DMA request? I thought about using ACTIVE and DONE bits of CSR register, but it seems they are not suitable for that.
Checking DONE == 1 works only when there was previous DMA transaction (it doesn't work if the DMA channel hasn't been used yet).
And ACTIVE is set to 0 on minor loop completition. I want something that tells me all major loops (whole tranaction) has been completed.
Thanks for help.