1199: STM32 SPI: Set clk-pin pull-up/-down to match spi clock polarity r=Dirbaio a=jr-oss
Fixes#1094
There are some proposed solutions in #1094
> Keep the DMA transaction open across calls to read/write
This may be problematic if the user changes bus settings between calls, and also the reference manual says the chip should not be placed into low power mode while SPI is enabled
As already described, this is problematic and against reference manual recommendation
> Set the CLK (and maybe MOSI) pins as pull-down on setup (or pull-up, depending on config - and this would need to be updated if the user modified the config)
This is less good than driving the pin to the correct value, but may be better than nothing
That is also my preferred solution. See below citation from reference manual.
> Document this and require users fix it themselves (add a pull-up/down resistor - or configure the pins as pull-up/pull-down before passing them into SPI setup)
Setting internal pull-up/-down won't work, because `sck.set_as_af()` will change the gpio pull mode to none: https://github.com/embassy-rs/embassy/blob/master/embassy-stm32/src/gpio.rs#L552-L555
> Dig around in the reference manual and determine if there is a better way to start/stop a DMA transaction while keeping active control of the clock the whole time
I haven't found a better way
------
From ST reference manual RM0394 (L4)
(Same note in RM0399 (H7) / RM0038 (L1) / RM0316 /F3)):
40.4.6
Communication formats
...
The idle state of SCK must correspond to the polarity selected in the SPIx_CR1 register (by
pulling up SCK if CPOL=1 or pulling down SCK if CPOL=0).
Co-authored-by: Ralf <jr-oss@gmx.net>
RM0394:
40.4.6
Communication formats
...
The idle state of SCK must correspond to the polarity selected in the SPIx_CR1 register (by
pulling up SCK if CPOL=1 or pulling down SCK if CPOL=0).
- Rename feature to `embedded-sdmmc`.
- Move embedded-sdmmc fork repo to the embassy-rs org.
- Remove unused features in the fork
- Fix impl in embassy-stm32
- Add to CI so it doesn't break again.
1159: stm32 usb otg bug fixes r=Dirbaio a=chemicstry
This fixes a couple of usb otg bugs that surfaced with `usb_ethernet` example from nrf:
- Properly implemented `Endpoint::wait_enabled()`
- Return `EndpointError::Disabled` when neccessary in `Endpoint::write()`
Co-authored-by: chemicstry <chemicstry@gmail.com>
The eth code is always built and available, but has no own API (other
than the embassy-net Device impl) to rx/tx packets. We could add this
API in the future, so the feature only means "embassy-net support".
1082: stm32: Add basic support for DMA priority settings r=lulf a=matoushybl
This adds very basic support for specifying priority for DMA interrupts. Unfortunately, the patch now doesn't allow for specifying different priorities for DMA1/DMA2, or BDMA1/BDMA2, which I didn't know how to support.
1083: stm32: Fix H7 unaligned erase r=lulf a=matoushybl
This PR simplifies erasing sectors on the H7, which was buggy.
Co-authored-by: Matous Hybl <hyblmatous@gmail.com>
1088: stm32: Enable fifo for buffered uart r=lulf a=matoushybl
This PR enables fifo for buffered uart where it is available. This should hopfully get rid of some overrun errors. I tried it in my application where it worked, but more intensive testing is probably required.
Co-authored-by: Matous Hybl <hyblmatous@gmail.com>
