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/* gc_n64_usb : Gamecube or N64 controller to USB adapter firmware
Copyright (C) 2007-2021 Raphael Assenat <raph@raphnet.net>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <util/delay.h>
#include "usb.h"
void enterBootLoader(void)
{
cli();
usb_shutdown();
_delay_ms(10);
#if defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega32U4__)
// ATmega32u2 : 0x3800
asm volatile(
"cli \n"
"ldi r30, 0x00 \n" // ZL
"ldi r31, 0x38 \n" // ZH
"ijmp");
#elif defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
// AT90USB1287/1286 : 0xF000 (word address)
asm volatile(
"cli \n"
"ldi r30, 0x00 \n" // ZL
"ldi r31, 0xF0 \n" // ZH
"ijmp");
#else
#error Bootloader address unknown for this CPU
#endif
}
void resetFirmware(void)
{
usb_shutdown();
// jump to the application reset vector
asm volatile(
"cli \n"
"ldi r30, 0x00 \n" // ZL
"ldi r31, 0x00 \n" // ZH
"ijmp");
}