68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/* ----------------------------------------------------------------------------
|
|
* key functions : device specific : code
|
|
* ----------------------------------------------------------------------------
|
|
* Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
|
|
* Released under The MIT License (MIT) (see "license.md")
|
|
* Project located at <https://github.com/benblazak/ergodox-firmware>
|
|
* ------------------------------------------------------------------------- */
|
|
|
|
|
|
#include <avr/interrupt.h>
|
|
#include <util/delay.h>
|
|
#include "../public.h"
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// descriptions
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*
|
|
* [name]
|
|
* Jump to Bootloader
|
|
*
|
|
* [description]
|
|
* For reflashing the controller
|
|
*/
|
|
void kbfun_jump_to_bootloader(void);
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
#if MAKEFILE_BOARD == teensy-2-0
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// from PJRC (slightly modified)
|
|
// <http://www.pjrc.com/teensy/jump_to_bootloader.html>
|
|
void kbfun_jump_to_bootloader(void) {
|
|
// --- for all Teensy boards ---
|
|
|
|
cli();
|
|
|
|
// disable watchdog, if enabled
|
|
// disable all peripherals
|
|
UDCON = 1;
|
|
USBCON = (1<<FRZCLK); // disable USB
|
|
UCSR1B = 0;
|
|
_delay_ms(5);
|
|
|
|
// --- Teensy 2.0 specific ---
|
|
|
|
EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
|
|
DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
|
|
PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
|
|
asm volatile("jmp 0x7E00");
|
|
}
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
#else
|
|
// ----------------------------------------------------------------------------
|
|
|
|
void kbfun_jump_to_bootloader(void) {}
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
#endif
|
|
// ----------------------------------------------------------------------------
|
|
|