The workflow only shows "Runs action-rs/cargo@v1" which does not tell us
much about what's actually being done.
The list and clean up done after each build varies by only the debug/release
part of the path that is repeated several times (2).
This commit gives each step a more meaningful name and simplify the list &
cleanup step with a generic one liner that can be copy/pasted without
modification.
Without this change, building the vector_table example fails when
building from the rp2040-hal directory:
```
rp2040-hal$ cargo build --release --example vector_table
Compiling rp2040-hal v0.5.0 (rp2040-hal)
error[E0432]: unresolved import `pac::interrupt`
--> rp2040-hal/examples/vector_table.rs:30:5
|
30 | use pac::interrupt;
| ^^^^^---------
| | |
| | help: a similar name exists in the module (notice the capitalization): `Interrupt`
| no `interrupt` in the root
error: cannot determine resolution for the attribute macro `interrupt`
--> rp2040-hal/examples/vector_table.rs:148:3
|
148 | #[interrupt]
| ^^^^^^^^^
|
= note: import resolution is stuck, try simplifying macro imports
```
* Add struct VectorTable to represent an interrupt vector table
* Add member function to VectorTable to initialise based on the current Interrupt Vector Table from VTOR
* Add member function to VectorTable to register an extern "C" function to call on interrupt
* Add example using VectorTable to demonstrate initialisation and interrupt function registration
usb_device ignores PollResult::Suspend when already suspended,
and PollResult::Resume when not suspended.
This may lead to repeatedly triggered interrupts if for some reason
the Suspend flag gets set while the device is already suspended.
I observed such a situation when a reset was triggered while the device
was suspended.
To make sure that this can't cause interrupt storms, clear the flags
before returning from poll()
- 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.
Uses build.rs in board directories to set the linker options locally.
The file .cargo/config can't be used for that, as in a workspace the
local .cargo/config is ignored if the build is triggered from the
workspace root.
The ep0-out buffer must not be marked as available unless required.
Otherwise, the controller will acknowledge the data-out packet but
won't reflect that in its status registers.
This patch forces the controller to nack the data-out phase until we have
processed the setup packet.
As per 4.1.2.5.1, the access to the DPSRAM should "be considered asynchronous
and not atomic".
It is recommended to write to buffer control register in two steps.
A first one to configure all bits but Available.
Wait clk_sys/clk_usb (typically 125MHz/48MHz).
Then set the available bit (if required).
The only thing accessed by those methods is `&mut self`, which is
guaranteed to be a unique reference. So an interrupt can not
interfere with the correctness of the operation.
Current version of probe-run is 0.3.3, which uses defmt 0.3.2.
With a firmware using defmt 0.2, this causes the following error
message:
```
Error: defmt wire format version mismatch: firmware is using 0.2, `probe-run` supports 3
suggestion: `cargo install` a different version of `probe-run` that supports defmt 0.2
```
Therefore, upgrade defmt dependency, and also fix the linker script
in .cargo/config.
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 `&`.
