/* Copyright (c) 2012 Arduino. All right reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "Reset.h" #ifdef __cplusplus extern "C" { #endif __attribute__ ((long_call, section (".ramfunc"))) void banzai() { // Disable all interrupts __disable_irq(); // Set bootflag to run SAM-BA bootloader at restart const int EEFC_FCMD_CGPB = 0x0C; const int EEFC_KEY = 0x5A; while (EFC0->EEFC_FSR & EEFC_FSR_FRDY == 0); EFC0->EEFC_FCR = EEFC_FCR_FCMD(EEFC_FCMD_CGPB) | EEFC_FCR_FARG(1) | EEFC_FCR_FKEY(EEFC_KEY); while (EFC0->EEFC_FSR & EEFC_FSR_FRDY == 0); // From here flash memory is no more available. // Memory swap needs some time to stabilize for (uint32_t i=0; i<1000000; i++) // force compiler to not optimize this __asm__ __volatile__(""); // BANZAIIIIIII!!! const int RSTC_KEY = 0xA5; RSTC->RSTC_CR = RSTC_CR_KEY(RSTC_KEY) | RSTC_CR_PROCRST | RSTC_CR_PERRST; while (true); } static int ticks = -1; void initiateReset(int _ticks) { ticks = _ticks; } void cancelReset() { ticks = -1; } void tickReset() { if (ticks == -1) return; ticks--; if (ticks == 0) banzai(); } #ifdef __cplusplus } #endif