mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-07-10 06:18:40 +02:00
Kevin Thomas
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/**
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* @file main.c
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* @brief Watchdog feed demonstration.
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* @author Kevin Thomas
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* @date 2026
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*
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* Enables the watchdog with a 3-second timeout and feeds it
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* every 1 second. Reports whether the system booted from a
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* watchdog reset or a normal power-on.
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*
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* Wiring:
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* GPIO0 -> UART TX (USB-to-UART adapter RX)
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* GPIO1 -> UART RX (USB-to-UART adapter TX)
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* No external components required
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*
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* MIT License
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*
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* Copyright (c) 2026 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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#include "rp2350_watchdog.h"
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#include "rp2350_uart.h"
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#include "rp2350_delay.h"
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/**
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* @brief Print the reset reason over UART.
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* @retval None
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*/
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static void print_reset_reason(void)
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{
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if (watchdog_caused_reboot())
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uart_puts("System rebooted by watchdog timeout\r\n");
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else
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uart_puts("Normal power-on reset\r\n");
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}
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/**
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* @brief Feed the watchdog, report over UART, and delay 1 second.
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* @retval None
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*/
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static void feed_and_report(void)
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{
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watchdog_feed();
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uart_puts("Watchdog fed\r\n");
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delay_ms(1000);
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}
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int main(void)
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{
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print_reset_reason();
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watchdog_enable(3000);
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uart_puts("Watchdog enabled (3s timeout). Feeding every 1s...\r\n");
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while (1)
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feed_and_report();
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}
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