No TIM2 on STM32L052

[shufps]

Hi,

I tried to setup PWM for TIM2, Channel 1 and the compiler complains that it doesn't know TIM2.

Error:

error[E0609]: no field `TIM2` on type `Peripherals`
   --> src/bin/blinky.rs:155:36
    |
155 |     let mut pwm = SimplePwm::new(p.TIM2, Some(ch1), None, None, None, khz(10), Default::default());
    |                                    ^^^^ help: a field with a similar name exists: `TIM21`

and it doesn't seem to exist?

But TIM2 appears several times in the _generated.rs.

Has someone an idea what I'm doing wrong? 🥺

[shufps]

Hmm, TIM2 appears in peripherals_definition but not in peripherals_struct 🤔

[shufps]

and it also seems to appear in the included metadata.rs:

    Peripheral {
        name: "TIM2",
        address: 1073741824,
        registers: Some(PeripheralRegisters {
            kind: "timer",
            version: "v1",
            block: "TIM_GP16",
            ir: &timer::REGISTERS,
        }),

[timokroeger]

Do you use the time-driver-any feature of embassy-stm32? If I remember correctly it picks TIM2 as backing timer making it unavailable to use in the application code.
You can either disable the time feature altogether or make it use a different timer with one of those cargo features

[shufps]

Yes, time-driver-any is the default in all examples.

Okay, I see! I'll switch it to hmm ...tim6 then because it's unused.

Thx a lot!

[shufps]

Oh, there is no time-driver-tim6 feature 😭

This will require a hardware change because I need it 🥺

Why doesn't it use the systick timer like on STM32 HAL?

Blocking such "important" timers is not a good way to implement this, imho, especially when there is an extra timer that is exactly for something like this.
@timokroeger

Probably I need to setup another timer that generates 1kHz interrupts and to manage the systick myself 🙈

[timokroeger]

Oh, there is no time-driver-tim6 feature

It looks like TIM6 has no compare channel which is required to use it as timer driver

Why doesn't it use the systick timer like on STM32 HAL?

#786

[shufps]

@timokroeger tim22 is working fine - and probably tim21 will work too.

Will do a PR for extending the feature-set and build.rs script 😊

I can live with some less important timer like tim22 👍