Timer DMA burst

[shirase]

Some FC, like SPEEDYBEEF405V3 do not have enouth DMA channels for timers. And some motors not works on DSHOT.
This PR fix it, by using dma burst mode. It need only one DMA channel for four timer channels.

[DzikuVx]

Wow! Amazing! Let me test in a next few day! Thank you very much @shirase

[shirase]

It must work on all F4 targets.
Activated by: #define USE_DSHOT_DMAR

[mmosca]

This will certainly decrease the number of users asking about this in the future :)

[Jetrell]

It must work on all F4 targets. Activated by: #define USE_DSHOT_DMAR

Very nice. I assume this should be a good fix for the Matek F405miniTE as well ?

[rmaia3d]

It must work on all F4 targets. Activated by: #define USE_DSHOT_DMAR

Very nice. I assume this should be a good fix for the Matek F405miniTE as well ?

I was going to ask the very same thing! :)

[shirase]

Very nice. I assume this should be a good fix for the Matek F405miniTE as well ?

I do not have that board. Can someone test it?

[shirase]

Added HAL library implementation. Now it can be used for all targets. Need to be tested.

[DzikuVx]

Tested with SPDBF405V3 and regular MatekF722 and everything seems to work fine.. If something is broken, we will find out what is it later :)

[DzikuVx]

Thank you very much much @shirase

[MATEKSYS]

Thanks for adding DMAR support. Tested with MatekF405TE target, S3 on TIM1_CH3N still doesn't work.
seems CH'N" support is a legacy bug . With betaflight fw, TIM1_CH3N works fine with normal DMA2_ST6, also works normal with DMA burst.

Betaflight, dshot_burst = OFF

DMA1 Stream 0: FREE
DMA1 Stream 1: FREE
DMA1 Stream 2: FREE
DMA1 Stream 3: SPI_MISO 2
DMA1 Stream 4: SPI_MOSI 2
DMA1 Stream 5: FREE
DMA1 Stream 6: FREE
DMA1 Stream 7: FREE
DMA2 Stream 0: SPI_MISO 1
DMA2 Stream 1: MOTOR 4
DMA2 Stream 2: MOTOR 2
DMA2 Stream 3: SPI_MOSI 1
DMA2 Stream 4: ADC 1
DMA2 Stream 5: FREE
DMA2 Stream 6: MOTOR 3
DMA2 Stream 7: MOTOR 1

Betaflight, dshot_burst = ON

DMA1 Stream 0: FREE
DMA1 Stream 1: FREE
DMA1 Stream 2: FREE
DMA1 Stream 3: SPI_MISO 2
DMA1 Stream 4: SPI_MOSI 2
DMA1 Stream 5: FREE
DMA1 Stream 6: FREE
DMA1 Stream 7: FREE
DMA2 Stream 0: SPI_MISO 1
DMA2 Stream 1: TIMUP 8
DMA2 Stream 2: FREE
DMA2 Stream 3: SPI_MOSI 1
DMA2 Stream 4: ADC 1
DMA2 Stream 5: TIMUP 1
DMA2 Stream 6: FREE
DMA2 Stream 7: FREE

[rmaia3d]

As mentioned in #9276, this PR apparently broke DShot beeper on all targets. Reverting it, makes DShot beeper work again even in targets that don't use the DMA burst mode.

[shirase]

It works fine on DSHOT600. DSHOT300 - beeper not work. I will make fix.

[sensei-hacker]

Are there disadvantages to using this?
Is it okay to use it fairly liberally as needed, or are there drawbacks?

[shirase]

It can be used everywhere. But need tests for different boards. Do not enable if you do not have board for testing.