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// this code from: |
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// http://www.pjrc.com/teensy/jump_to_bootloader.html |
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#include <avr/io.h> |
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#include <avr/interrupt.h> |
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#include <util/delay.h> |
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void jump_bootloader() { |
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cli(); |
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// disable watchdog, if enabled |
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// disable all peripherals |
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UDCON = 1; |
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USBCON = (1<<FRZCLK); // disable USB |
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UCSR1B = 0; |
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_delay_ms(5); |
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#if defined(__AVR_AT90USB162__) // Teensy 1.0 |
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DDRB = 0; DDRC = 0; DDRD = 0; |
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TIMSK0 = 0; TIMSK1 = 0; |
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asm volatile("jmp 0x1F00"); |
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#elif defined(__AVR_ATmega32U4__) // Teensy 2.0 |
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DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; |
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TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; |
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ADCSRA = 0; |
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asm volatile("jmp 0x3F00"); |
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#elif defined(__AVR_AT90USB646__) // Teensy++ 1.0 |
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DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; |
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TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; |
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ADCSRA = 0; |
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asm volatile("jmp 0x7E00"); |
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#elif defined(__AVR_AT90USB1286__) // Teensy++ 2.0 |
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DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; |
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TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; |
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ADCSRA = 0; |
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asm volatile("jmp 0xFE00"); |
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#endif |
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} |