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// #################################################################################################
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// # < neo430_wdt.c - Watchdog helper functions > #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # #
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// # Copyright (c) 2020, Stephan Nolting. All rights reserved. #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # conditions and the following disclaimer. #
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// # #
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// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
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// # conditions and the following disclaimer in the documentation and/or other materials #
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// # provided with the distribution. #
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// # #
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// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
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// # endorse or promote products derived from this software without specific prior written #
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// # permission. #
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// # #
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// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
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// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
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// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
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// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
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// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
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// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
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// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
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// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
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// # OF THE POSSIBILITY OF SUCH DAMAGE. #
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// # ********************************************************************************************* #
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// # The NEO430 Processor - https://github.com/stnolting/neo430 #
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// #################################################################################################
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#include "neo430.h"
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#include "neo430_wdt.h"
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/* ------------------------------------------------------------
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* INFO Enable watchdog
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* PARAM Prescaler selection (0..7)
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* ------------------------------------------------------------ */
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void neo430_wdt_enable(uint8_t prsc) {
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WDT_CT = (WDT_CT_PASSWORD<<8) | (1<<WDT_CT_EN) | (prsc & 0x07);
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}
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/* ------------------------------------------------------------
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* INFO Disable watchdog
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* ------------------------------------------------------------ */
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void neo430_wdt_disable(void) {
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WDT_CT = (WDT_CT_PASSWORD<<8) | (0<<WDT_CT_EN);
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}
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/* ------------------------------------------------------------
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* INFO Reset watchdog
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* ------------------------------------------------------------ */
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void neo430_wdt_reset(void) {
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WDT_CT = WDT_CT | (WDT_CT_PASSWORD<<8);
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}
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/* ------------------------------------------------------------
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* INFO Perform a hardware reset by activating the WDT and
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* performing an invalid access (wrong password)
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* ------------------------------------------------------------ */
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void neo430_wdt_force_hw_reset(void) {
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WDT_CT = (WDT_CT_PASSWORD<<8) | (1<<WDT_CT_EN);
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WDT_CT = 0; // invalid access -> triggers reset
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}
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