Open jeffery88 opened 11 months ago
HiFiPhile
commented
11 months ago Hi,
We had some discussion regarding DMA support in the past. The difficulty is to have a portable abstraction layer to make DMA compatible with most MCUs, also DWC2 is used by many Cortex-M & RiSC-V MCU families.
It's welcomed if you want to make a PR.
cleverca22
commented
11 months ago one area ive seen makes the fifo/dma stuff a bit more obvious, in dwc host mode
the high-speed ping protocol is manual when in non-dma mode so you dont write to the fifo, you just enable sending pings and when the ping gets an ACK, then you write to the fifo, and send the actual OUT
but in dma mode, you configure the DMA addr and enable pinging it will ping, but not do dma once it gets an ACK from the device, it will fill its own FIFO with DMA, and then perform the OUT
so at the end, its still driven by all of the FIFO's, but its just using DMA to fill them at the right time
Related area
DMA
Hardware specification
synopsys dwc2
Is your feature request related to a problem?
How can tinyusb support dma features when its operation seems to be all fifo based? It is recommended to add the implementation of dma to improve the transfer rate of usb
Describe the solution you'd like
It's difficult when I want to use the dma function with the tinyusb.I hope tinyusb can support dma feature.And I would be happy to port synopsys's dma to tinyusb.
I have checked existing issues, dicussion and documentation