/** * Copyright (c) 2020 Raspberry Pi (Trading) Ltd. * * SPDX-License-Identifier: BSD-3-Clause */ #include <stdio.h> #include "pico/stdlib.h" #include "pico/multicore.h" /// \tag::multicore_dispatch[] #define FLAG_VALUE 123 void core1_entry() { while (1) { // Function pointer is passed to us via the FIFO // We have one incoming int32_t as a parameter, and will provide an // int32_t return value by simply pushing it back on the FIFO // which also indicates the result is ready. int32_t (*func)() = (int32_t(*)()) multicore_fifo_pop_blocking(); int32_t p = multicore_fifo_pop_blocking(); int32_t result = (*func)(p); multicore_fifo_push_blocking(result); } } int32_t factorial(int32_t n) { int32_t f = 1; for (int i = 2; i <= n; i++) { f *= i; } return f; } int32_t fibonacci(int32_t n) { if (n == 0) return 0; if (n == 1) return 1; int n1 = 0, n2 = 1, n3 = 0; for (int i = 2; i <= n; i++) { n3 = n1 + n2; n1 = n2; n2 = n3; } return n3; } #define TEST_NUM 10 int main() { int res; stdio_init_all(); printf("Hello, multicore_runner!\n"); // This example dispatches arbitrary functions to run on the second core // To do this we run a dispatcher on the second core that accepts a function // pointer and runs it multicore_launch_core1(core1_entry); multicore_fifo_push_blocking((uintptr_t) &factorial); multicore_fifo_push_blocking(TEST_NUM); // We could now do a load of stuff on core 0 and get our result later res = multicore_fifo_pop_blocking(); printf("Factorial %d is %d\n", TEST_NUM, res); // Now try a different function multicore_fifo_push_blocking((uintptr_t) &fibonacci); multicore_fifo_push_blocking(TEST_NUM); res = multicore_fifo_pop_blocking(); printf("Fibonacci %d is %d\n", TEST_NUM, res); return 0; } /// \end::multicore_dispatch[]

This firmware image was imported from the pico-examples repository. 


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