Run a simple program in stm32

[tasosxak]

Hi,
Any idea how to run a simple program for stm32 using this wrapper?

#![no_std]

extern crate freertos_rs;

use freertos_rs::*;
use prelude::v1::*;

#[no_mangle]
pub extern fn main_entry() {
  
}

error[E0603]: module `prelude` is private
 --> src/main.rs:6:18
  |
6 | use prelude::v1::*;