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optiboot_atmega168.elf: file format elf32-avr
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 000001f4 00003e00 00003e00 00000054 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .version 00000002 00003ffe 00003ffe 00000248 2**0
CONTENTS, READONLY
2 .debug_aranges 00000028 00000000 00000000 0000024a 2**0
CONTENTS, READONLY, DEBUGGING
3 .debug_pubnames 0000005f 00000000 00000000 00000272 2**0
CONTENTS, READONLY, DEBUGGING
4 .debug_info 000002a8 00000000 00000000 000002d1 2**0
CONTENTS, READONLY, DEBUGGING
5 .debug_abbrev 00000178 00000000 00000000 00000579 2**0
CONTENTS, READONLY, DEBUGGING
6 .debug_line 00000488 00000000 00000000 000006f1 2**0
CONTENTS, READONLY, DEBUGGING
7 .debug_frame 00000080 00000000 00000000 00000b7c 2**2
CONTENTS, READONLY, DEBUGGING
8 .debug_str 0000014f 00000000 00000000 00000bfc 2**0
CONTENTS, READONLY, DEBUGGING
9 .debug_loc 000002d8 00000000 00000000 00000d4b 2**0
CONTENTS, READONLY, DEBUGGING
10 .debug_ranges 00000078 00000000 00000000 00001023 2**0
CONTENTS, READONLY, DEBUGGING
Disassembly of section .text:
00003e00 <main>:
#define rstVect (*(uint16_t*)(RAMSTART+SPM_PAGESIZE*2+4))
#define wdtVect (*(uint16_t*)(RAMSTART+SPM_PAGESIZE*2+6))
#endif
/* main program starts here */
int main(void) {
3e00: 11 24 eor r1, r1
#ifdef __AVR_ATmega8__
SP=RAMEND; // This is done by hardware reset
#endif
// Adaboot no-wait mod
ch = MCUSR;
3e02: 84 b7 in r24, 0x34 ; 52
MCUSR = 0;
3e04: 14 be out 0x34, r1 ; 52
if (!(ch & _BV(EXTRF))) appStart();
3e06: 81 ff sbrs r24, 1
3e08: f0 d0 rcall .+480 ; 0x3fea <appStart>
#if LED_START_FLASHES > 0
// Set up Timer 1 for timeout counter
TCCR1B = _BV(CS12) | _BV(CS10); // div 1024
3e0a: 85 e0 ldi r24, 0x05 ; 5
3e0c: 80 93 81 00 sts 0x0081, r24
UCSRA = _BV(U2X); //Double speed mode USART
UCSRB = _BV(RXEN) | _BV(TXEN); // enable Rx & Tx
UCSRC = _BV(URSEL) | _BV(UCSZ1) | _BV(UCSZ0); // config USART; 8N1
UBRRL = (uint8_t)( (F_CPU + BAUD_RATE * 4L) / (BAUD_RATE * 8L) - 1 );
#else
UCSR0A = _BV(U2X0); //Double speed mode USART0
3e10: 82 e0 ldi r24, 0x02 ; 2
3e12: 80 93 c0 00 sts 0x00C0, r24
UCSR0B = _BV(RXEN0) | _BV(TXEN0);
3e16: 88 e1 ldi r24, 0x18 ; 24
3e18: 80 93 c1 00 sts 0x00C1, r24
UCSR0C = _BV(UCSZ00) | _BV(UCSZ01);
3e1c: 86 e0 ldi r24, 0x06 ; 6
3e1e: 80 93 c2 00 sts 0x00C2, r24
UBRR0L = (uint8_t)( (F_CPU + BAUD_RATE * 4L) / (BAUD_RATE * 8L) - 1 );
3e22: 80 e1 ldi r24, 0x10 ; 16
3e24: 80 93 c4 00 sts 0x00C4, r24
#endif
#endif
// Set up watchdog to trigger after 500ms
watchdogConfig(WATCHDOG_1S);
3e28: 8e e0 ldi r24, 0x0E ; 14
3e2a: c9 d0 rcall .+402 ; 0x3fbe <watchdogConfig>
/* Set LED pin as output */
LED_DDR |= _BV(LED);
3e2c: 25 9a sbi 0x04, 5 ; 4
3e2e: 86 e0 ldi r24, 0x06 ; 6
}
#if LED_START_FLASHES > 0
void flash_led(uint8_t count) {
do {
TCNT1 = -(F_CPU/(1024*16));
3e30: 20 e3 ldi r18, 0x30 ; 48
3e32: 3c ef ldi r19, 0xFC ; 252
TIFR1 = _BV(TOV1);
3e34: 91 e0 ldi r25, 0x01 ; 1
}
#if LED_START_FLASHES > 0
void flash_led(uint8_t count) {
do {
TCNT1 = -(F_CPU/(1024*16));
3e36: 30 93 85 00 sts 0x0085, r19
3e3a: 20 93 84 00 sts 0x0084, r18
TIFR1 = _BV(TOV1);
3e3e: 96 bb out 0x16, r25 ; 22
while(!(TIFR1 & _BV(TOV1)));
3e40: b0 9b sbis 0x16, 0 ; 22
3e42: fe cf rjmp .-4 ; 0x3e40 <main+0x40>
#ifdef __AVR_ATmega8__
LED_PORT ^= _BV(LED);
#else
LED_PIN |= _BV(LED);
3e44: 1d 9a sbi 0x03, 5 ; 3
}
#endif
// Watchdog functions. These are only safe with interrupts turned off.
void watchdogReset() {
__asm__ __volatile__ (
3e46: a8 95 wdr
LED_PORT ^= _BV(LED);
#else
LED_PIN |= _BV(LED);
#endif
watchdogReset();
} while (--count);
3e48: 81 50 subi r24, 0x01 ; 1
3e4a: a9 f7 brne .-22 ; 0x3e36 <main+0x36>
3e4c: cc 24 eor r12, r12
3e4e: dd 24 eor r13, r13
ch = SPM_PAGESIZE / 2;
do {
uint16_t a;
a = *bufPtr++;
a |= (*bufPtr++) << 8;
__boot_page_fill_short((uint16_t)(void*)addrPtr,a);
3e50: 88 24 eor r8, r8
3e52: 83 94 inc r8
addrPtr += 2;
} while (--ch);
// Write from programming buffer
__boot_page_write_short((uint16_t)(void*)address);
3e54: b5 e0 ldi r27, 0x05 ; 5
3e56: ab 2e mov r10, r27
boot_spm_busy_wait();
#if defined(RWWSRE)
// Reenable read access to flash
boot_rww_enable();
3e58: a1 e1 ldi r26, 0x11 ; 17
3e5a: 9a 2e mov r9, r26
do *bufPtr++ = getch();
while (--length);
// If we are in NRWW section, page erase has to be delayed until now.
// Todo: Take RAMPZ into account
if (address >= NRWWSTART) __boot_page_erase_short((uint16_t)(void*)address);
3e5c: f3 e0 ldi r31, 0x03 ; 3
3e5e: bf 2e mov r11, r31
#endif
/* Forever loop */
for (;;) {
/* get character from UART */
ch = getch();
3e60: a2 d0 rcall .+324 ; 0x3fa6 <getch>
if(ch == STK_GET_PARAMETER) {
3e62: 81 34 cpi r24, 0x41 ; 65
3e64: 61 f4 brne .+24 ; 0x3e7e <main+0x7e>
unsigned char which = getch();
3e66: 9f d0 rcall .+318 ; 0x3fa6 <getch>
3e68: 08 2f mov r16, r24
verifySpace();
3e6a: af d0 rcall .+350 ; 0x3fca <verifySpace>
if (which == 0x82) {
3e6c: 02 38 cpi r16, 0x82 ; 130
3e6e: 11 f0 breq .+4 ; 0x3e74 <main+0x74>
/*
* Send optiboot version as "minor SW version"
*/
putch(OPTIBOOT_MINVER);
} else if (which == 0x81) {
3e70: 01 38 cpi r16, 0x81 ; 129
3e72: 11 f4 brne .+4 ; 0x3e78 <main+0x78>
putch(OPTIBOOT_MAJVER);
3e74: 84 e0 ldi r24, 0x04 ; 4
3e76: 01 c0 rjmp .+2 ; 0x3e7a <main+0x7a>
} else {
/*
* GET PARAMETER returns a generic 0x03 reply for
* other parameters - enough to keep Avrdude happy
*/
putch(0x03);
3e78: 83 e0 ldi r24, 0x03 ; 3
3e7a: 8d d0 rcall .+282 ; 0x3f96 <putch>
3e7c: 89 c0 rjmp .+274 ; 0x3f90 <main+0x190>
}
}
else if(ch == STK_SET_DEVICE) {
3e7e: 82 34 cpi r24, 0x42 ; 66
3e80: 11 f4 brne .+4 ; 0x3e86 <main+0x86>
// SET DEVICE is ignored
getNch(20);
3e82: 84 e1 ldi r24, 0x14 ; 20
3e84: 03 c0 rjmp .+6 ; 0x3e8c <main+0x8c>
}
else if(ch == STK_SET_DEVICE_EXT) {
3e86: 85 34 cpi r24, 0x45 ; 69
3e88: 19 f4 brne .+6 ; 0x3e90 <main+0x90>
// SET DEVICE EXT is ignored
getNch(5);
3e8a: 85 e0 ldi r24, 0x05 ; 5
3e8c: a6 d0 rcall .+332 ; 0x3fda <getNch>
3e8e: 80 c0 rjmp .+256 ; 0x3f90 <main+0x190>
}
else if(ch == STK_LOAD_ADDRESS) {
3e90: 85 35 cpi r24, 0x55 ; 85
3e92: 79 f4 brne .+30 ; 0x3eb2 <main+0xb2>
// LOAD ADDRESS
uint16_t newAddress;
newAddress = getch();
3e94: 88 d0 rcall .+272 ; 0x3fa6 <getch>
newAddress = (newAddress & 0xff) | (getch() << 8);
3e96: e8 2e mov r14, r24
3e98: ff 24 eor r15, r15
3e9a: 85 d0 rcall .+266 ; 0x3fa6 <getch>
3e9c: 08 2f mov r16, r24
3e9e: 10 e0 ldi r17, 0x00 ; 0
3ea0: 10 2f mov r17, r16
3ea2: 00 27 eor r16, r16
3ea4: 0e 29 or r16, r14
3ea6: 1f 29 or r17, r15
#ifdef RAMPZ
// Transfer top bit to RAMPZ
RAMPZ = (newAddress & 0x8000) ? 1 : 0;
#endif
newAddress += newAddress; // Convert from word address to byte address
3ea8: 00 0f add r16, r16
3eaa: 11 1f adc r17, r17
address = newAddress;
verifySpace();
3eac: 8e d0 rcall .+284 ; 0x3fca <verifySpace>
3eae: 68 01 movw r12, r16
3eb0: 6f c0 rjmp .+222 ; 0x3f90 <main+0x190>
}
else if(ch == STK_UNIVERSAL) {
3eb2: 86 35 cpi r24, 0x56 ; 86
3eb4: 21 f4 brne .+8 ; 0x3ebe <main+0xbe>
// UNIVERSAL command is ignored
getNch(4);
3eb6: 84 e0 ldi r24, 0x04 ; 4
3eb8: 90 d0 rcall .+288 ; 0x3fda <getNch>
putch(0x00);
3eba: 80 e0 ldi r24, 0x00 ; 0
3ebc: de cf rjmp .-68 ; 0x3e7a <main+0x7a>
}
/* Write memory, length is big endian and is in bytes */
else if(ch == STK_PROG_PAGE) {
3ebe: 84 36 cpi r24, 0x64 ; 100
3ec0: 09 f0 breq .+2 ; 0x3ec4 <main+0xc4>
3ec2: 40 c0 rjmp .+128 ; 0x3f44 <main+0x144>
// PROGRAM PAGE - we support flash programming only, not EEPROM
uint8_t *bufPtr;
uint16_t addrPtr;
getch(); /* getlen() */
3ec4: 70 d0 rcall .+224 ; 0x3fa6 <getch>
length = getch();
3ec6: 6f d0 rcall .+222 ; 0x3fa6 <getch>
3ec8: 08 2f mov r16, r24
getch();
3eca: 6d d0 rcall .+218 ; 0x3fa6 <getch>
// If we are in RWW section, immediately start page erase
if (address < NRWWSTART) __boot_page_erase_short((uint16_t)(void*)address);
3ecc: 80 e0 ldi r24, 0x00 ; 0
3ece: c8 16 cp r12, r24
3ed0: 88 e3 ldi r24, 0x38 ; 56
3ed2: d8 06 cpc r13, r24
3ed4: 18 f4 brcc .+6 ; 0x3edc <main+0xdc>
3ed6: f6 01 movw r30, r12
3ed8: b7 be out 0x37, r11 ; 55
3eda: e8 95 spm
3edc: c0 e0 ldi r28, 0x00 ; 0
3ede: d1 e0 ldi r29, 0x01 ; 1
// While that is going on, read in page contents
bufPtr = buff;
do *bufPtr++ = getch();
3ee0: 62 d0 rcall .+196 ; 0x3fa6 <getch>
3ee2: 89 93 st Y+, r24
while (--length);
3ee4: 0c 17 cp r16, r28
3ee6: e1 f7 brne .-8 ; 0x3ee0 <main+0xe0>
// If we are in NRWW section, page erase has to be delayed until now.
// Todo: Take RAMPZ into account
if (address >= NRWWSTART) __boot_page_erase_short((uint16_t)(void*)address);
3ee8: f0 e0 ldi r31, 0x00 ; 0
3eea: cf 16 cp r12, r31
3eec: f8 e3 ldi r31, 0x38 ; 56
3eee: df 06 cpc r13, r31
3ef0: 18 f0 brcs .+6 ; 0x3ef8 <main+0xf8>
3ef2: f6 01 movw r30, r12
3ef4: b7 be out 0x37, r11 ; 55
3ef6: e8 95 spm
// Read command terminator, start reply
verifySpace();
3ef8: 68 d0 rcall .+208 ; 0x3fca <verifySpace>
// If only a partial page is to be programmed, the erase might not be complete.
// So check that here
boot_spm_busy_wait();
3efa: 07 b6 in r0, 0x37 ; 55
3efc: 00 fc sbrc r0, 0
3efe: fd cf rjmp .-6 ; 0x3efa <main+0xfa>
3f00: a6 01 movw r20, r12
3f02: a0 e0 ldi r26, 0x00 ; 0
3f04: b1 e0 ldi r27, 0x01 ; 1
bufPtr = buff;
addrPtr = (uint16_t)(void*)address;
ch = SPM_PAGESIZE / 2;
do {
uint16_t a;
a = *bufPtr++;
3f06: 2c 91 ld r18, X
3f08: 30 e0 ldi r19, 0x00 ; 0
a |= (*bufPtr++) << 8;
3f0a: 11 96 adiw r26, 0x01 ; 1
3f0c: 8c 91 ld r24, X
3f0e: 11 97 sbiw r26, 0x01 ; 1
3f10: 90 e0 ldi r25, 0x00 ; 0
3f12: 98 2f mov r25, r24
3f14: 88 27 eor r24, r24
3f16: 82 2b or r24, r18
3f18: 93 2b or r25, r19
#define rstVect (*(uint16_t*)(RAMSTART+SPM_PAGESIZE*2+4))
#define wdtVect (*(uint16_t*)(RAMSTART+SPM_PAGESIZE*2+6))
#endif
/* main program starts here */
int main(void) {
3f1a: 12 96 adiw r26, 0x02 ; 2
ch = SPM_PAGESIZE / 2;
do {
uint16_t a;
a = *bufPtr++;
a |= (*bufPtr++) << 8;
__boot_page_fill_short((uint16_t)(void*)addrPtr,a);
3f1c: fa 01 movw r30, r20
3f1e: 0c 01 movw r0, r24
3f20: 87 be out 0x37, r8 ; 55
3f22: e8 95 spm
3f24: 11 24 eor r1, r1
addrPtr += 2;
3f26: 4e 5f subi r20, 0xFE ; 254
3f28: 5f 4f sbci r21, 0xFF ; 255
} while (--ch);
3f2a: f1 e0 ldi r31, 0x01 ; 1
3f2c: a0 38 cpi r26, 0x80 ; 128
3f2e: bf 07 cpc r27, r31
3f30: 51 f7 brne .-44 ; 0x3f06 <main+0x106>
// Write from programming buffer
__boot_page_write_short((uint16_t)(void*)address);
3f32: f6 01 movw r30, r12
3f34: a7 be out 0x37, r10 ; 55
3f36: e8 95 spm
boot_spm_busy_wait();
3f38: 07 b6 in r0, 0x37 ; 55
3f3a: 00 fc sbrc r0, 0
3f3c: fd cf rjmp .-6 ; 0x3f38 <main+0x138>
#if defined(RWWSRE)
// Reenable read access to flash
boot_rww_enable();
3f3e: 97 be out 0x37, r9 ; 55
3f40: e8 95 spm
3f42: 26 c0 rjmp .+76 ; 0x3f90 <main+0x190>
#endif
}
/* Read memory block mode, length is big endian. */
else if(ch == STK_READ_PAGE) {
3f44: 84 37 cpi r24, 0x74 ; 116
3f46: b1 f4 brne .+44 ; 0x3f74 <main+0x174>
// READ PAGE - we only read flash
getch(); /* getlen() */
3f48: 2e d0 rcall .+92 ; 0x3fa6 <getch>
length = getch();
3f4a: 2d d0 rcall .+90 ; 0x3fa6 <getch>
3f4c: f8 2e mov r15, r24
getch();
3f4e: 2b d0 rcall .+86 ; 0x3fa6 <getch>
verifySpace();
3f50: 3c d0 rcall .+120 ; 0x3fca <verifySpace>
3f52: f6 01 movw r30, r12
3f54: ef 2c mov r14, r15
putch(result);
address++;
}
while (--length);
#else
do putch(pgm_read_byte_near(address++));
3f56: 8f 01 movw r16, r30
3f58: 0f 5f subi r16, 0xFF ; 255
3f5a: 1f 4f sbci r17, 0xFF ; 255
3f5c: 84 91 lpm r24, Z+
3f5e: 1b d0 rcall .+54 ; 0x3f96 <putch>
while (--length);
3f60: ea 94 dec r14
3f62: f8 01 movw r30, r16
3f64: c1 f7 brne .-16 ; 0x3f56 <main+0x156>
#define rstVect (*(uint16_t*)(RAMSTART+SPM_PAGESIZE*2+4))
#define wdtVect (*(uint16_t*)(RAMSTART+SPM_PAGESIZE*2+6))
#endif
/* main program starts here */
int main(void) {
3f66: 08 94 sec
3f68: c1 1c adc r12, r1
3f6a: d1 1c adc r13, r1
3f6c: fa 94 dec r15
3f6e: cf 0c add r12, r15
3f70: d1 1c adc r13, r1
3f72: 0e c0 rjmp .+28 ; 0x3f90 <main+0x190>
#endif
#endif
}
/* Get device signature bytes */
else if(ch == STK_READ_SIGN) {
3f74: 85 37 cpi r24, 0x75 ; 117
3f76: 39 f4 brne .+14 ; 0x3f86 <main+0x186>
// READ SIGN - return what Avrdude wants to hear
verifySpace();
3f78: 28 d0 rcall .+80 ; 0x3fca <verifySpace>
putch(SIGNATURE_0);
3f7a: 8e e1 ldi r24, 0x1E ; 30
3f7c: 0c d0 rcall .+24 ; 0x3f96 <putch>
putch(SIGNATURE_1);
3f7e: 84 e9 ldi r24, 0x94 ; 148
3f80: 0a d0 rcall .+20 ; 0x3f96 <putch>
putch(SIGNATURE_2);
3f82: 86 e0 ldi r24, 0x06 ; 6
3f84: 7a cf rjmp .-268 ; 0x3e7a <main+0x7a>
}
else if (ch == 'Q') {
3f86: 81 35 cpi r24, 0x51 ; 81
3f88: 11 f4 brne .+4 ; 0x3f8e <main+0x18e>
// Adaboot no-wait mod
watchdogConfig(WATCHDOG_16MS);
3f8a: 88 e0 ldi r24, 0x08 ; 8
3f8c: 18 d0 rcall .+48 ; 0x3fbe <watchdogConfig>
verifySpace();
}
else {
// This covers the response to commands like STK_ENTER_PROGMODE
verifySpace();
3f8e: 1d d0 rcall .+58 ; 0x3fca <verifySpace>
}
putch(STK_OK);
3f90: 80 e1 ldi r24, 0x10 ; 16
3f92: 01 d0 rcall .+2 ; 0x3f96 <putch>
3f94: 65 cf rjmp .-310 ; 0x3e60 <main+0x60>
00003f96 <putch>:
}
}
void putch(char ch) {
3f96: 98 2f mov r25, r24
#ifndef SOFT_UART
while (!(UCSR0A & _BV(UDRE0)));
3f98: 80 91 c0 00 lds r24, 0x00C0
3f9c: 85 ff sbrs r24, 5
3f9e: fc cf rjmp .-8 ; 0x3f98 <putch+0x2>
UDR0 = ch;
3fa0: 90 93 c6 00 sts 0x00C6, r25
[uartBit] "I" (UART_TX_BIT)
:
"r25"
);
#endif
}
3fa4: 08 95 ret
00003fa6 <getch>:
[uartBit] "I" (UART_RX_BIT)
:
"r25"
);
#else
while(!(UCSR0A & _BV(RXC0)))
3fa6: 80 91 c0 00 lds r24, 0x00C0
3faa: 87 ff sbrs r24, 7
3fac: fc cf rjmp .-8 ; 0x3fa6 <getch>
;
if (!(UCSR0A & _BV(FE0))) {
3fae: 80 91 c0 00 lds r24, 0x00C0
3fb2: 84 fd sbrc r24, 4
3fb4: 01 c0 rjmp .+2 ; 0x3fb8 <getch+0x12>
}
#endif
// Watchdog functions. These are only safe with interrupts turned off.
void watchdogReset() {
__asm__ __volatile__ (
3fb6: a8 95 wdr
* don't care that an invalid char is returned...)
*/
watchdogReset();
}
ch = UDR0;
3fb8: 80 91 c6 00 lds r24, 0x00C6
LED_PIN |= _BV(LED);
#endif
#endif
return ch;
}
3fbc: 08 95 ret
00003fbe <watchdogConfig>:
"wdr\n"
);
}
void watchdogConfig(uint8_t x) {
WDTCSR = _BV(WDCE) | _BV(WDE);
3fbe: e0 e6 ldi r30, 0x60 ; 96
3fc0: f0 e0 ldi r31, 0x00 ; 0
3fc2: 98 e1 ldi r25, 0x18 ; 24
3fc4: 90 83 st Z, r25
WDTCSR = x;
3fc6: 80 83 st Z, r24
}
3fc8: 08 95 ret
00003fca <verifySpace>:
do getch(); while (--count);
verifySpace();
}
void verifySpace() {
if (getch() != CRC_EOP) {
3fca: ed df rcall .-38 ; 0x3fa6 <getch>
3fcc: 80 32 cpi r24, 0x20 ; 32
3fce: 19 f0 breq .+6 ; 0x3fd6 <verifySpace+0xc>
watchdogConfig(WATCHDOG_16MS); // shorten WD timeout
3fd0: 88 e0 ldi r24, 0x08 ; 8
3fd2: f5 df rcall .-22 ; 0x3fbe <watchdogConfig>
3fd4: ff cf rjmp .-2 ; 0x3fd4 <verifySpace+0xa>
while (1) // and busy-loop so that WD causes
; // a reset and app start.
}
putch(STK_INSYNC);
3fd6: 84 e1 ldi r24, 0x14 ; 20
}
3fd8: de cf rjmp .-68 ; 0x3f96 <putch>
00003fda <getNch>:
::[count] "M" (UART_B_VALUE)
);
}
#endif
void getNch(uint8_t count) {
3fda: 1f 93 push r17
3fdc: 18 2f mov r17, r24
do getch(); while (--count);
3fde: e3 df rcall .-58 ; 0x3fa6 <getch>
3fe0: 11 50 subi r17, 0x01 ; 1
3fe2: e9 f7 brne .-6 ; 0x3fde <getNch+0x4>
verifySpace();
3fe4: f2 df rcall .-28 ; 0x3fca <verifySpace>
}
3fe6: 1f 91 pop r17
3fe8: 08 95 ret
00003fea <appStart>:
WDTCSR = _BV(WDCE) | _BV(WDE);
WDTCSR = x;
}
void appStart() {
watchdogConfig(WATCHDOG_OFF);
3fea: 80 e0 ldi r24, 0x00 ; 0
3fec: e8 df rcall .-48 ; 0x3fbe <watchdogConfig>
__asm__ __volatile__ (
3fee: ee 27 eor r30, r30
3ff0: ff 27 eor r31, r31
3ff2: 09 94 ijmp
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