Ported the DMA peripheral from pebble/qemu

beckus / qemu_stm32

QEMU with an STM32 microcontroller implementation

http://beckus.github.io/qemu_stm32/

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Ported the DMA peripheral from pebble/qemu #23

Closed baselsayeh closed 5 years ago

baselsayeh commented 5 years ago

Currently,

Only uart tx and rx dma inturupt is implemented
Starting a dma from or to peripherals does not work but works in circular mode (uart with dma inturrupts works)
Half-transfer and error-transfer inturrupt is not implemented
Dma transfers pauses the emulation while dma transfers occures (needs multi-threaded timers and inturrupts)

beckus commented 5 years ago

Sorry for the delay. Thank you for submitting this - it's nice to see the list of supported peripherals grow.

beckus commented 5 years ago

I added another commit 9852410 to fix some minor compile warnings I was receiving with the new DMA code. I have my compiler set to treat warnings as errors (which I think is the default for QEMU if I recall correctly), and would prefer not to disable warnings (even though one of the changes was a bit ugly). These changes shouldn't have any effect, though I don't have a way to test right now.