Cast errors with 0.4.0

[garrensmith]

Hi, I'm very new to doing embedded dev with Rust.
I'm trying to use https://github.com/42-technology-ltd/nrf9160-demo
but I keep getting cast errors like this:

let result = unsafe { sys::nrf_write(self.fd, ptr as *const _, length) };
    |                                                                        ^^^^^^ expected `u32`, found `usize`

Is there a way to fix this or can I help fix it?

[jonathanpallant]

Which version of nrfxlib are you using with the demo crate? It should probably be updated to use the latest one.

[garrensmith]

I've tried the master branch for the nrf9160-demo and that doesn't build. I played around with updating dependencies which caused the above issue. I think switched to the use_latest_nrfxlib branch. That failed to get nrfxlib. I changed updated the nrfxlib to:

nrfxlib = {git = "https://github.com/42-technology-ltd/nrfxlib"}

That builds up to a point and then I get:

warning: Linking globals named 'DEVICE_PERIPHERALS': symbol multiply defined!

error: failed to load bc of "nrf9160_pac-149a0337cd75d160.nrf9160_pac.780wv3by-cgu.0.rcgu.o": 

error: aborting due to previous error; 1 warning emitted

error: could not compile `nrf9160-demo`.

Any ideas on how to fix that?

[jonathanpallant]

Please see 42-technology-ltd/nrf9160-demo#1 for a working example using nrfxlib v0.5.0 (which uses nrfxlib-sys v1.2.0)