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126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin, Hinnerk van Bruinehsen
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* 2017 RWTH Aachen, Josua Arndt
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* 2018 Matthew Blue
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* 2021-2023 Gerson Fernando Budke
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* 2023 Hugues Larrive
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_atmega_common
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* @{
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*
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* @file
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* @brief Implementation of the CPU initialization
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*
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* @author Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
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* @author Steffen Robertz <steffen.robertz@rwth-aachen.de>
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* @author Josua Arndt <jarndt@ias.rwth-aachen.de>
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* @author Matthew Blue <matthew.blue.neuro@gmail.com>
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* @author Francisco Acosta <francisco.acosta@inria.fr>
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* @author Gerson Fernando Budke <nandojve@gmail.com>
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* @author Hugues Larrive <hugues.larrive@pm.me>
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*
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* @}
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*/
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#include "board.h"
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#include "cpu.h"
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#include "irq_arch.h"
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#include "panic.h"
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#include "sys/bus.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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#ifndef CPU_ATMEGA_CLK_SCALE_INIT
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#define CPU_ATMEGA_CLK_SCALE_INIT CPU_ATMEGA_CLK_SCALE_DIV1
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#endif
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extern uint8_t mcusr_mirror;
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extern uint8_t soft_rst;
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void avr8_reset_cause(void)
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{
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if (mcusr_mirror & (1 << PORF)) {
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DEBUG("Power-on reset.\n");
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}
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if (mcusr_mirror & (1 << EXTRF)) {
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DEBUG("External reset!\n");
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}
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if (mcusr_mirror & (1 << BORF)) {
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DEBUG("Brownout reset!\n");
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}
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if (mcusr_mirror & (1 << WDRF)) {
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if (soft_rst & 0xAA) {
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DEBUG("Software reset!\n");
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} else {
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DEBUG("Watchdog reset!\n");
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}
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}
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#if defined(JTRF)
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if (mcusr_mirror & (1 << JTRF)) {
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DEBUG("JTAG reset!\n");
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}
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#endif
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}
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void __attribute__((weak)) avr8_clk_init(void)
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{
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#if defined(CLKPR)
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atmega_set_prescaler(CPU_ATMEGA_CLK_SCALE_INIT);
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#endif
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}
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/* This is a vector which is aliased to __vector_default,
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* the vector executed when an ISR fires with no accompanying
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* ISR handler. This may be used along with the ISR() macro to
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* create a catch-all for undefined but used ISRs for debugging
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* purposes.
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* SCIRQS – Symbol Counter Interrupt Status Register
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* BATMON – Battery Monitor Control and Status Register
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* IRQ_STATUS /1 – Transceiver Interrupt Status Register
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* EIFR – External Interrupt Flag Register
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* PCIFR – Pin Change Interrupt Flag Register
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*/
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ISR(BADISR_vect, ISR_NAKED)
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{
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avr8_reset_cause();
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#if defined(TRX_CTRL_0) /* megaRF */
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printf("IRQ_STATUS %#02x\n", (unsigned int)IRQ_STATUS);
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#if defined(IRQ_STATUS1)
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printf("IRQ_STATUS1 %#02x\n", (unsigned int)IRQ_STATUS1);
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#endif
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printf("SCIRQS %#02x\nBATMON %#02x\n", (unsigned int)SCIRQS, (unsigned int)BATMON);
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printf("EIFR %#02x\nPCIFR %#02x\n", (unsigned int)EIFR, (unsigned int)PCIFR);
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#endif
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#ifdef LED_PANIC
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/* Use LED light to signal ERROR. */
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LED_PANIC;
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#endif
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core_panic(PANIC_GENERAL_ERROR, "BADISR");
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}
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#if defined(BAT_LOW_vect)
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static inline void bat_low_handler(void)
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{
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DEBUG("BAT_LOW\n");
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#if MODULE_SYS_BUS_POWER
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msg_bus_t *bus = sys_bus_get(SYS_BUS_POWER);
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msg_bus_post(bus, SYS_BUS_POWER_EVENT_LOW_VOLTAGE, NULL);
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#endif
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}
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AVR8_ISR(BAT_LOW_vect, bat_low_handler);
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#endif
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