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libwebsockets/lib/drivers/spi/bitbang
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Andy Green e3743d47b4 lws_spi: Add esp32 DMA support 
This provides an alternative esp32-specific SPI driver with ops that can be
swapped in place of the gpio bitbang one.

The pinmux info and lws gpio driver and other data in the spi bitbang
struct are used as-is by the DMA one.

New ops are provided which are able to allocate and free DMA-able memory so
the device drivers can prepare directly usable buffers.  Bounce through to
DMA-able buffers is also transparently supported.
2022-03-25 08:18:30 +00:00
..
lws-bb-spi.c lws_spi: Add esp32 DMA support 2022-03-25 08:18:30 +00:00