mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
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Kevin Thomas
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/**
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* @file 0x0c_multicore.c
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* @brief Multicore FIFO messaging demo using multicore.c/multicore.h
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* @author Kevin Thomas
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* @date 2025
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*
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* MIT License
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*
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* Copyright (c) 2025 Kevin Thomas
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* -----------------------------------------------------------------------------
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*
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* Demonstrates dual-core operation using the multicore driver
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* (multicore.h / multicore.c). Core 0 sends an incrementing counter to
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* core 1 via the FIFO; core 1 returns the value plus one. Both values
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* are printed over UART every second.
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*
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* Wiring:
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* No external wiring required (dual-core communication is on-chip)
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "multicore.h"
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/**
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* @brief Core 1 entry point: receive a value and return it incremented
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*
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* Blocks on the FIFO, adds one to each received value, and pushes
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* the result back to core 0.
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*/
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static void _core1_main(void) {
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while (true) {
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uint32_t value = multicore_driver_pop();
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multicore_driver_push(value + 1u);
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}
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}
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/**
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* @brief Send the counter to core 1 and print the round-trip result
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*
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* @param counter Pointer to the running counter (post-incremented)
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*/
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static void _send_and_print(uint32_t *counter) {
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multicore_driver_push(*counter);
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uint32_t response = multicore_driver_pop();
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printf("core0 sent: %lu, core1 returned: %lu\r\n",
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(unsigned long)*counter, (unsigned long)response);
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(*counter)++;
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sleep_ms(1000);
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}
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/**
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* @brief Application entry point for the multicore FIFO demo
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*
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* Launches core 1 and continuously sends an incrementing counter
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* through the inter-core FIFO, printing both sent and returned
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* values over UART every second.
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*
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* @return int Does not return
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*/
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int main(void) {
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stdio_init_all();
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multicore_driver_launch(_core1_main);
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uint32_t counter = 0;
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while (true)
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_send_and_print(&counter);
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}
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