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[/] [neo430/] [trunk/] [neo430/] [sw/] [lib/] [neo430/] [source/] [neo430_wdt.c] - Blame information for rev 198

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1 198 zero_gravi
// #################################################################################################
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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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