Subversion Repositories neo430

// #################################################################################################
// #  < neo430_wdt.c - Watchdog helper functions >                                                 #
// # ********************************************************************************************* #
// # BSD 3-Clause License                                                                          #
// #                                                                                               #
// # Copyright (c) 2020, Stephan Nolting. All rights reserved.                                     #
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// # permitted provided that the following conditions are met:                                     #
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// #    permission.                                                                                #
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// # ********************************************************************************************* #
// # The NEO430 Processor - https://github.com/stnolting/neo430                                    #
// #################################################################################################
 
#include "neo430.h"
#include "neo430_wdt.h"
 
 
/* ------------------------------------------------------------
 * INFO Enable watchdog
 * PARAM Prescaler selection (0..7)
 * ------------------------------------------------------------ */
void neo430_wdt_enable(uint8_t prsc) {
 
  WDT_CT = (WDT_CT_PASSWORD<<8) | (1<<WDT_CT_EN) | (prsc & 0x07);
}
 
 
/* ------------------------------------------------------------
 * INFO Disable watchdog
 * ------------------------------------------------------------ */
void neo430_wdt_disable(void) {
 
  WDT_CT = (WDT_CT_PASSWORD<<8) | (0<<WDT_CT_EN);
}
 
 
/* ------------------------------------------------------------
 * INFO Reset watchdog
 * ------------------------------------------------------------ */
void neo430_wdt_reset(void) {
 
  WDT_CT = WDT_CT | (WDT_CT_PASSWORD<<8);
}
 
 
/* ------------------------------------------------------------
 * INFO Perform a hardware reset by activating the WDT and
 * performing an invalid access (wrong password)
 * ------------------------------------------------------------ */
void neo430_wdt_force_hw_reset(void) {
 
  WDT_CT = (WDT_CT_PASSWORD<<8) | (1<<WDT_CT_EN);
  WDT_CT = 0; // invalid access -> triggers reset
}