Commit graph

16 commits

Author SHA1 Message Date
A. Gavin 993487443a
examples: clarify usage of boot2 section (#443) 2022-09-02 06:38:58 +01:00
Wilfried Chauveau 93ec18be07 migrate rp2040-hal from embedded_time to fugit 2022-08-24 22:46:34 +01:00
Wilfried Chauveau 42e929d7e1
Use rp2040-hal in all example (possibly through their bsp) (#423)
* Use rp2040-hal in all example (possibly through their bsp)

Some of the examples were using the cortex_m_rt::entry method which
misses the device specific spinlock re-initialisation.

This commits makes the usage more consistent by using rp2040_hal exported
macro as the only `entry` method used across examples.
2022-08-21 19:01:45 +01:00
Jan Niehusmann d4743061fa Use generic boot loader for rp2040-hal examples
Those examples should be independent of a specific board.
The generic boot loader increases their compatibility.
2022-08-11 11:56:41 +00:00
Jan Niehusmann 44019781e2 Use wfi in otherwise empty infinite loops in examples
- Clippy warns about empty loops, https://github.com/rust-lang/rust-clippy/issues/6161
- wfi allows to CPU to save some power

WFI was avoided in examples for fear of ill interactions with debuggers.
However the rp2040 debug port does continue to work, as long as the
relevant clocks are not disabled in SLEEP_EN0/SLEEP_EN1. (By default,
all clocks stay enabled in sleep mode.)

This patch replaces several different workarounds with just calling wfi.
2022-08-01 14:54:03 +00:00
Jan Niehusmann 595e0a9974 i2c is driven from system_clock, noch peripheral_clock. Update example accordingly. 2022-07-22 20:34:56 +00:00
Jan Niehusmann f8984a9eac Implement conversion from Clock to Hertz using reference
Implementing `impl From<SystemClock> for Hertz` is a footgun, as
SystemClock is not Copy, so the automatic conversion consumes the
owned clock.

This is visible in the example i2c.rs:

```
    let mut i2c = hal::I2C::i2c1(
        pac.I2C1,
        sda_pin,
        scl_pin, // Try `not_an_scl_pin` here
        400.kHz(),
        &mut pac.RESETS,
        clocks.peripheral_clock,
    );
```

If the user wants to use both `i2c0` and `i2c1` at the same time,
copying from this example won't work:

```
error[E0382]: use of moved value: `clocks.peripheral_clock`
   --> rp2040-hal/examples/i2c.rs:106:9
    |
97  |         clocks.peripheral_clock,
    |         ----------------------- value moved here
...
106 |         clocks.peripheral_clock,
    |         ^^^^^^^^^^^^^^^^^^^^^^^ value used here after move
    |
    = note: move occurs because `clocks.peripheral_clock` has type
`PeripheralClock`, which does not implement the `Copy` trait
```

As getting the frequency from a clock doesn't really need ownership,
changing it to `impl From<&SystemClock> for Hertz` is both more
logical and provides better usability.

This is, however, a breaking change: Code relying on this trait
implementation needs to be changed by adding a `&`.
2022-07-22 20:17:26 +00:00
mqy 623457a498 fixed typos 2022-04-30 12:51:45 +10:00
9names dc8ceffd09 Move uses of sio::Sio to Sio 2021-12-04 16:20:27 +11:00
9names 55a8b4acf9 Re-export mod structs 2021-12-04 00:04:45 +11:00
Jonathan Pallant (42 Technology) 8e66ddcfb1 Switch to new rp2040-boot2 crate. 2021-10-18 10:53:17 +01:00
Jonathan Pallant (42 Technology) d251627e47 Make trait comments more consistent. 2021-09-27 19:01:46 +01:00
Jonathan Pallant (42 Technology) 225eabb449 Use peripheral clock to describe the clock signal given to peripherals. 2021-09-27 18:42:36 +01:00
Jonathan Pallant (42 Technology) b7acc7c373 Polish I2C example. 2021-09-27 17:30:29 +01:00
Hmvp 4970075974 Also clippy check examples 2021-07-26 20:37:08 +10:00
Jonathan Nilsson 077cba68f5
I2C (#56)
* I2C implementation based on C SDK

* Basic I2C Example
2021-07-25 02:16:07 +10:00