96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* Copyright (C) 2014 Infineon Technologies AG. All rights reserved.
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*
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* Infineon Technologies AG (Infineon) is supplying this software for use with
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* Infineon's microcontrollers.
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* This file can be freely distributed within development tools that are
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* supporting such microcontrollers.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* INFINEON SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
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* OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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*/
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/**
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* @file
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* @date 01 Aug, 2014
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* @version 0.1.0
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*
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* @brief XMC1000 Bootkit Watchdog demo example
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*
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* Watchdog example in which the watchdog needs to be feed every second
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* The example feeds the watchdog 25 times (see blinking LED), after that the device goes into reset
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* since no more feeding occurs simulating a fault (see LED stays on).
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*
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* History <br>
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*
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* Version 0.1.0 Initial <br>
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*
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*/
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#include <xmc_wdt.h>
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#include <xmc_scu.h>
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#include <xmc_gpio.h>
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#define TICKS_PER_SECOND 1000
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#define TICKS_WAIT 1000
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#define MAX_NUM_FEEDS 25
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#define LED P0_6
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XMC_WDT_CONFIG_t wdt_config =
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{
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.window_lower_bound = 30000,
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.window_upper_bound = 35000,
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.service_pulse_width = 255
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};
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void SysTick_Handler(void)
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{
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static uint32_t ticks = 0;
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static uint32_t feeds = 0;
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ticks++;
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if (ticks == TICKS_WAIT && feeds < MAX_NUM_FEEDS)
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{
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XMC_GPIO_ToggleOutput(LED);
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XMC_WDT_Service();
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ticks = 0;
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feeds++;
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}
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}
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int main(void)
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{
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XMC_GPIO_SetMode(LED, XMC_GPIO_MODE_OUTPUT_PUSH_PULL);
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if ((XMC_SCU_RESET_GetDeviceResetReason() & XMC_SCU_RESET_REASON_WATCHDOG) != 0)
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{
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XMC_GPIO_SetOutputHigh(LED);
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while(1)
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{
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/* Infinite loop */
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}
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}
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/* Clear system reset status */
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/* Note: API will be added in the next release */
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SCU_RESET->RSTCLR |= SCU_RESET_RSTCLR_RSCLR_Msk;
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XMC_WDT_Init(&wdt_config);
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XMC_WDT_Start();
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/* Feed the watchdog periodically every 1s */
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SysTick_Config(SystemCoreClock / TICKS_PER_SECOND);
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while(1)
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{
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/* Infinite loop */
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}
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}
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