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Diffstat (limited to 'software/avr.lib/util.c')
-rw-r--r-- | software/avr.lib/util.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/software/avr.lib/util.c b/software/avr.lib/util.c new file mode 100644 index 0000000..d927f8e --- /dev/null +++ b/software/avr.lib/util.c @@ -0,0 +1,93 @@ +/* + * spreadspace avr utils + * + * + * Copyright (C) 2012 Christian Pointner <equinox@spreadspace.org> + * + * This file is part of spreadspace avr utils. + * + * spreadspace avr utils 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 + * any later version. + * + * spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <avr/interrupt.h> +#include <avr/io.h> +#include <util/delay.h> + +#include "util.h" + +#if defined(CLKPR) +#define CPU_PRESCALE(n) do { CLKPR = 0x80; CLKPR = (n); } while(0) +#else +#define CPU_PRESCALE(n) +#endif + +void cpu_init(void) +{ + CPU_PRESCALE(0); +} + +#if defined(__BOARD_teensy1__) + #define BOOTLOADER_VEC 0x3E00 +#elif defined(__BOARD_teensy2__) + #define BOOTLOADER_VEC 0x7E00 +#elif defined(__BOARD_teensy1pp__) + #define BOOTLOADER_VEC 0xFC00 +#elif defined(__BOARD_teensy2pp__) + #define BOOTLOADER_VEC 0x1FC00 +#elif defined(__BOARD_hhd70dongle__) + #define BOOTLOADER_VEC 0x3800 +#endif + +typedef void (*f_ptr_type)(void); +f_ptr_type start_bootloader = (f_ptr_type)BOOTLOADER_VEC; + +void reset2bootloader(void) +{ +#if defined(__BOARD_teensy1__) || defined(__BOARD_teensy1pp__) || defined(__BOARD_teensy2__) || defined(__BOARD_teensy2pp__) || defined(__BOARD_hhd70dongle__) + cli(); + // disable watchdog, if enabled + // disable all peripherals + UDCON = 1; + USBCON = (1<<FRZCLK); // disable USB + UCSR1B = 0; + _delay_ms(5); + #if defined(__BOARD_teensy1__) + EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; + TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0; + DDRB = 0; DDRC = 0; DDRD = 0; + PORTB = 0; PORTC = 0; PORTD = 0; + #elif defined(__BOARD_teensy2__) + 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; + #elif defined(__BOARD_teensy1pp__) + EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0; + TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0; + DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; + PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0; + #elif defined(__BOARD_teensy2pp__) + EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0; + TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0; + DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; + PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0; + #elif defined(__BOARD_hhd70dongle__) + 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; + #endif + start_bootloader(); +#endif +} |