multicore.c

/**
 * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <stdio.h>
#include "pico/stdlib.h"
#include "pico/multicore.h"

#define FLAG_VALUE 123

void core1_entry() {

    multicore_fifo_push_blocking(FLAG_VALUE);

    uint32_t g = multicore_fifo_pop_blocking();

    if (g != FLAG_VALUE)
        printf("Hmm, that's not right on core 1!\n");
    else
        printf("Its all gone well on core 1!");

    while (1)
        tight_loop_contents();
}

int main() {
    stdio_init_all();
    printf("Hello, multicore!\n");

    /// \tag::setup_multicore[]

    multicore_launch_core1(core1_entry);

    // Wait for it to start up

    uint32_t g = multicore_fifo_pop_blocking();

    if (g != FLAG_VALUE)
        printf("Hmm, that's not right on core 0!\n");
    else {
        multicore_fifo_push_blocking(FLAG_VALUE);
        printf("It's all gone well on core 0!");
    }

    /// \end::setup_multicore[]
}