suspect-devices/circuitpython/stmhal/dma.h, branch esp-extra-scripts CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=esp-extra-scripts 2016-06-29T13:28:49+00:00 stmhal: Correct DMA to allow SD card on L4 MCUs. 2016-06-29T13:28:49+00:00 dpslwk dps.lwk@gmail.com 2016-06-29T11:26:21+00:00 urn:sha1:b03df60f32c977a8a272cdeeaf1812f79918e69c stmhal: L4: Adapt DMA to be able to support STM32L4 MCU series. 2016-05-05T13:51:20+00:00 Tobias Badertscher python@baerospace.ch 2016-03-22T10:28:35+00:00 urn:sha1:e64032d6fdeb079de2ace20b64899d1ceb6754f1 The main thing is to change the DMA code in a way that the structure DMA_Stream_TypeDef (which is similar to DMA_Channel_TypeDef on stm32l4) is no longer used outside of dma.c, as this structure only exists for the F4 series. Therefore I introduced a new structure (dma_descr_t) which handles all DMA specific stuff for configuration. Further the periphery (spi, i2c, sdcard, dac) does not need to know the internals of the dma. stmhal: Extend SPI support to fully support all SPI devices on STM32F429. 2015-12-16T00:38:36+00:00 Tobias Badertscher python@baerospace.ch 2015-12-08T14:41:47+00:00 urn:sha1:c5d8ffef581fe83ccec276d0bfa8fcc15e9f9524 This includes SPI4, SPI5 and SPI6. stmhal: Put all DMA channel & stream definitions in dma.h 2015-12-02T22:55:57+00:00 Dave Hylands dhylands@gmail.com 2015-12-01T08:42:47+00:00 urn:sha1:0077958ad0d278c87620ee8ead9a9aea80f1663d stmhal: On SysTick IRQ, only process one DMA channel at a time. 2015-11-24T15:44:16+00:00 Damien George damien.p.george@gmail.com 2015-11-24T15:40:59+00:00 urn:sha1:22bd23114af166980bad6ff00caaf97fdb1f2cf4 This can be generalised if/when more processing is needed by SysTick. Thanks to @chuckbook for the idea. stmhal: Turn off DMA clocks when idle for 100 msec 2015-11-24T09:37:25+00:00 Dave Hylands dhylands@gmail.com 2015-11-16T01:02:43+00:00 urn:sha1:b677f03407c1b35fcfc4d6948a34a4281033865a Turning on each DMA block increases the current consumption by about 8 mA. This code adds an idle timer for each DMA block and turns off the clocks when no streams are in use for 128 msec. Having a small timeout allows for improved performance when back-to-back transfers are being performed. The 128 msec is basically a guess. stmhal/dma.c: Modify dma_init() to accept init struct as an argument 2015-06-24T16:48:52+00:00 blmorris bryan.morrissey@gmail.com 2015-06-22T13:24:59+00:00 urn:sha1:c5175526dda06d278dd569dd7bfce0c65cbbe5fc This removes hard-coded DMA init params from dma_init(), instead defining these parameters in a DMA_InitTypeDef struct that gets passed as an argument to dma_init() This makes dma_init more generic so it can be used for I2S and SD Card, which require different initialization parameters. stmhal: Factor out DMA initialisation code from spi.c. 2015-06-10T13:01:44+00:00 Damien George damien.p.george@gmail.com 2015-06-10T12:06:48+00:00 urn:sha1:3d30d605f5286774edb7669f3958628e5c656048 This is so that the DMA can be shared by multiple peripherals.