stm32f3discovery/
virtual_uart_rx_test.rs

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// Licensed under the Apache License, Version 2.0 or the MIT License.
// SPDX-License-Identifier: Apache-2.0 OR MIT
// Copyright Tock Contributors 2022.

//! Test reception on the virtualized UART by creating two readers that
//! read in parallel. To add this test, include the line
//! ```
//!    virtual_uart_rx_test::run_virtual_uart_receive(mux_uart);
//! ```
//! to the nucleo_446re boot sequence, where `mux_uart` is a
//! `capsules_core::virtualizers::virtual_uart::MuxUart`. There is a 3-byte and a 7-byte read
//! running in parallel. Test that they are both working by typing and seeing
//! that they both get all characters. If you repeatedly type 'a', for example
//! (0x61), you should see something like:
//! ```
//! Starting receive of length 3
//! Virtual uart read complete: CommandComplete:
//! 61
//! 61
//! 61
//! 61
//! 61
//! 61
//! 61
//! Starting receive of length 7
//! Virtual uart read complete: CommandComplete:
//! 61
//! 61
//! 61
//! Starting receive of length 3
//! Virtual uart read complete: CommandComplete:
//! 61
//! 61
//! 61
//! Starting receive of length 3
//! Virtual uart read complete: CommandComplete:
//! 61
//! 61
//! 61
//! 61
//! 61
//! 61
//! 61
//! Starting receive of length 7
//! Virtual uart read complete: CommandComplete:
//! 61
//! 61
//! 61
//! ```

use core::ptr::addr_of_mut;

use capsules_core::test::virtual_uart::TestVirtualUartReceive;
use capsules_core::virtualizers::virtual_uart::{MuxUart, UartDevice};
use kernel::debug;
use kernel::hil::uart::Receive;
use kernel::static_init;

pub unsafe fn run_virtual_uart_receive(mux: &'static MuxUart<'static>) {
    debug!("Starting virtual reads.");
    let small = static_init_test_receive_small(mux);
    let large = static_init_test_receive_large(mux);
    small.run();
    large.run();
}

unsafe fn static_init_test_receive_small(
    mux: &'static MuxUart<'static>,
) -> &'static TestVirtualUartReceive {
    static mut SMALL: [u8; 3] = [0; 3];
    let device = static_init!(UartDevice<'static>, UartDevice::new(mux, true));
    device.setup();
    let test = static_init!(
        TestVirtualUartReceive,
        TestVirtualUartReceive::new(device, &mut *addr_of_mut!(SMALL))
    );
    device.set_receive_client(test);
    test
}

unsafe fn static_init_test_receive_large(
    mux: &'static MuxUart<'static>,
) -> &'static TestVirtualUartReceive {
    static mut BUFFER: [u8; 7] = [0; 7];
    let device = static_init!(UartDevice<'static>, UartDevice::new(mux, true));
    device.setup();
    let test = static_init!(
        TestVirtualUartReceive,
        TestVirtualUartReceive::new(device, &mut *addr_of_mut!(BUFFER))
    );
    device.set_receive_client(test);
    test
}