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hello_resus
for Raspberry Pi Pico™ 2 W, submitted by flashmypico

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/** * Copyright (c) 2021 Raspberry Pi (Trading) Ltd. * * SPDX-License-Identifier: BSD-3-Clause */ #include <stdio.h> #include "pico/stdlib.h" #include "hardware/clocks.h" #include "hardware/pll.h" volatile bool seen_resus; void resus_callback(void) { // Reconfigure PLL sys back to the default state of 1500 / 6 / 2 = 125MHz pll_init(pll_sys, 1, 1500 * MHZ, 6, 2); // CLK SYS = PLL SYS (125MHz) / 1 = 125MHz clock_configure(clk_sys, CLOCKS_CLK_SYS_CTRL_SRC_VALUE_CLKSRC_CLK_SYS_AUX, CLOCKS_CLK_SYS_CTRL_AUXSRC_VALUE_CLKSRC_PLL_SYS, 125 * MHZ, 125 * MHZ); // Reconfigure uart as clocks have changed stdio_init_all(); printf("Resus event fired\n"); // Wait for uart output to finish uart_default_tx_wait_blocking(); seen_resus = true; } int main() { stdio_init_all(); printf("Hello resus\n"); seen_resus = false; clocks_enable_resus(&resus_callback); // Break PLL sys pll_deinit(pll_sys); while(!seen_resus); return 0; }

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

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Homepage: https://github.com/raspberrypi/pico-examples

Repository: https://github.com/raspberrypi/pico-examples/tree/master/clocks/hello_resus

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