This flag for example permits the following clock tree
configuration on stm32f103r8
let mut config = Config::default();
config.rcc.hse = Some(Hertz(16_000_000));
config.rcc.sys_ck = Some(Hertz(72_000_000));
config.rcc.pclk1 = Some(Hertz(36_000_000));
config.rcc.pclk2 = Some(Hertz(72_000_000));
config.rcc.pllxtpre = true;
Init fails if pllxtpre is false.
1376: rtc: cleanup and consolidate r=Dirbaio a=xoviat
This removes an extra file that I left in, adds an example, and consolidates the files into one 'v2' file.
Co-authored-by: xoviat <xoviat@users.noreply.github.com>
1405: add IPCC peripheral for stm32wb r=xoviat a=OueslatiGhaith
Hello again,
This pull request is related to #1397 and #1401, inspired by #24, and was tested on an stm32wb55rg.
This pull request aims to add the IPCC peripheral for stm32wb microcontrollers.
I am debating whether this should be included in the public API, since the IPCC peripheral would be typically managed by the TL Mailbox, not by the app directly.
Co-authored-by: OueslatiGhaith <ghaith.oueslati@enis.tn>
1412: stm32/uart: abort on error r=Dirbaio a=xoviat
This PR aborts the DMA transfer in the event of a UART error. Otherwise, the transfer will never complete, and an error will not be returned.
Co-authored-by: xoviat <xoviat@users.noreply.github.com>
1370: stm32/i2c: fix races when using dma. r=Dirbaio a=xoviat
This change addresses two races:
1. It removes the `chunks_transferred` state variable that is modified inside the interrupt. Analysis of the code reveals that the only time the waker can be woken is when `chunks_transferred` is incremented. Therefore, waking is enough to signal the `poll_fn` that the `chunks_transferred` has incremented. Moving to `remaining_len` clarifies the code, since there is no need to track how many chunks are remaining.
2. It moves the start of the transfer until after the waker is registered, which could theoretically occur if the clock speed is very low, but probably never would even if this wasn't fixed.
There is another race that I noticed: between writes the waker may not yet be registered. In that case, the code would simply be stuck and the `poll_fn` would never be woken. There is no way to resolve this without broadening the scope of the analysis, and this will likely never occur.
Co-authored-by: xoviat <xoviat@users.noreply.github.com>
