add watchdog timer example

This commit is contained in:
Mariano Alvira 2011-03-22 14:51:08 -04:00
parent a8b75286d6
commit 81a0a0356d
3 changed files with 83 additions and 1 deletions

View File

@ -220,6 +220,11 @@ struct CRM_struct {
static volatile struct CRM_struct * const CRM = (void *) (CRM_BASE);
/* COP watchdog timer helpers */
/* set the cop timout in milliseconds */
#define cop_timeout_ms(x) (CRM->COP_CNTLbits.COP_TIMEOUT = x/87)
#define cop_service() (CRM->COP_SERVICE = 0xc0de5afe)
/* Old register definitions, for compatibility */
#ifndef REG_NO_COMPAT

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@ -13,7 +13,8 @@ TARGETS := blink-red blink-green blink-blue blink-white blink-allio \
printf \
asm \
adc \
pwm
pwm \
wdt
# these targets are built with space reserved for variables needed by ROM services
# this space is initialized with a rom call to rom_data_init

76
tests/wdt.c Normal file
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@ -0,0 +1,76 @@
/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of libmc1322x: see http://mc1322x.devl.org
* for details.
*
*
*/
#include <mc1322x.h>
#include <board.h>
#include <stdio.h>
#include "config.h"
#define DELAY 400000
#define LED GPIO_LED_RED
void main(void) {
volatile uint32_t i;
uart1_init(INC,MOD,SAMP);
printf("reset\n\r");
/* set the watchdog timer timeout to 1 sec */
cop_timeout_ms(1000);
/* enable the watchdog timer */
CRM->COP_CNTLbits.COP_EN = 1;
GPIO->PAD_DIR.LED = 1;
while(1) {
/* uncomment cop_service for normal operation */
//cop_service();
GPIO->DATA.LED = 1;
for(i=0; i<DELAY; i++) { continue; }
GPIO->DATA.LED = 0;
for(i=0; i<DELAY; i++) { continue; }
};
}