mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-05-16 21:23:33 +02:00
Kevin Thomas
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/**
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* @file main.c
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* @brief Repeating timer alarm demonstration.
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* @author Kevin Thomas
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* @date 2026
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*
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* Configures TIMER0 alarm 0 to fire a callback every 1 second.
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* The callback prints "Timer heartbeat" over UART. The main
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* loop idles with WFI.
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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_timer.h"
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#include "rp2350_uart.h"
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/**
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* @brief Heartbeat callback invoked by TIMER0 alarm 0 IRQ.
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* @retval None
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*/
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static void heartbeat(void)
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{
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uart_puts("Timer heartbeat\r\n");
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}
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int main(void)
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{
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uart_puts("Timer alarm demo initialized\r\n");
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timer_alarm_start(1000, heartbeat);
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while (1)
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__asm__ volatile ("wfi");
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}
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