iNavFlight
for burst mode dmar, define as DMA_REQUEST_TIMx_UP
This small change seems to solve the issue on DMA / DSHOT not working on one pin on the H743:
https://github.com/iNavFlight/inav/issues/10835
As tested with this target: https://github.com/iNavFlight/inav/pull/10843
However, I would like to request review by someone who understands the DMA better, probably @shirase or @bkleiner ?
Add USE_DSHOT_DMAR in target. Nothing else. DEF_TIM_DMA__BTCH_TIM4_CH4 - this channel does not exist physically.
Add USE_DSHOT_DMAR in target. Nothing else. DEF_TIM_DMA__BTCH_TIM4_CH4 - this channel does not exist physically.
Agreed, using the UP request to substitute is not a good workaround here.
Thanks for the responses!
Add USE_DSHOT_DMAR in target. Nothing else.
That's the first thing I tried. Unfortunately that didn't work
When that did not work, I went on the adventure trying to figure out how this stuff works. I found that this change made it "work", but I don't have the background knowledge to know the best/right way to fix it.
dma burst mode use first initialized dma channel for all timer channels. It can not work if first initialized channel is empty. Using DMA_REQUEST_TIM4_UP for dma burst is not break anything. This PR can be merged.