Function rtt_target::set_print_channel_cs

pub unsafe fn set_print_channel_cs(
    channel: UpChannel, 
    cs: *const CriticalSectionFunc
)

Sets the channel to use for rprint and rprintln and the critical section function used to synchronize printing. You should only use this function if the set_print_channel function isn't available on your platform.

Example

Because the function takes a pointer to a function pointer as an argument, the syntax to call it is slightly convoluted. In this example, interrupt::free is a function that establishes a critical section and calls the supplied function.

use rtt_target::{rtt_init_detault, rprintln};
use platform_specific::interrupt;

fn main() -> ! {
    let channels = rtt_init_detault!();

    unsafe {
        rtt_target::set_print_channel_cs(
            channels.up.0,
            &((|arg, f| interrupt::free(|_| f(arg))) as rtt_target::CriticalSectionFunc) as *const _,
        )
    }

    loop {
        rprintln!("Hello, world!");
    }
}

Safety

This function is unsafe because the user must guarantee that the cs function pointer passed in adheres to the CriticalSectionFunc specification.