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optiboot_atmega328.elf: file format elf32-avr
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 000001f4 00007e00 00007e00 00000054 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .version 00000002 00007ffe 00007ffe 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:
00007e00 <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) {
7e00: 11 24 eor r1, r1
#ifdef __AVR_ATmega8__
SP=RAMEND; // This is done by hardware reset
#endif
// Adaboot no-wait mod
ch = MCUSR;
7e02: 84 b7 in r24, 0x34 ; 52
MCUSR = 0;
7e04: 14 be out 0x34, r1 ; 52
if (!(ch & _BV(EXTRF))) appStart();
7e06: 81 ff sbrs r24, 1
7e08: f0 d0 rcall .+480 ; 0x7fea <appStart>
#if LED_START_FLASHES > 0
// Set up Timer 1 for timeout counter
TCCR1B = _BV(CS12) | _BV(CS10); // div 1024
7e0a: 85 e0 ldi r24, 0x05 ; 5
7e0c: 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
7e10: 82 e0 ldi r24, 0x02 ; 2
7e12: 80 93 c0 00 sts 0x00C0, r24
UCSR0B = _BV(RXEN0) | _BV(TXEN0);
7e16: 88 e1 ldi r24, 0x18 ; 24
7e18: 80 93 c1 00 sts 0x00C1, r24
UCSR0C = _BV(UCSZ00) | _BV(UCSZ01);
7e1c: 86 e0 ldi r24, 0x06 ; 6
7e1e: 80 93 c2 00 sts 0x00C2, r24
UBRR0L = (uint8_t)( (F_CPU + BAUD_RATE * 4L) / (BAUD_RATE * 8L) - 1 );
7e22: 80 e1 ldi r24, 0x10 ; 16
7e24: 80 93 c4 00 sts 0x00C4, r24
#endif
#endif
// Set up watchdog to trigger after 500ms
watchdogConfig(WATCHDOG_1S);
7e28: 8e e0 ldi r24, 0x0E ; 14
7e2a: c9 d0 rcall .+402 ; 0x7fbe <watchdogConfig>
/* Set LED pin as output */
LED_DDR |= _BV(LED);
7e2c: 25 9a sbi 0x04, 5 ; 4
7e2e: 86 e0 ldi r24, 0x06 ; 6
}
#if LED_START_FLASHES > 0
void flash_led(uint8_t count) {
do {
TCNT1 = -(F_CPU/(1024*16));
7e30: 20 e3 ldi r18, 0x30 ; 48
7e32: 3c ef ldi r19, 0xFC ; 252
TIFR1 = _BV(TOV1);
7e34: 91 e0 ldi r25, 0x01 ; 1
}
#if LED_START_FLASHES > 0
void flash_led(uint8_t count) {
do {
TCNT1 = -(F_CPU/(1024*16));
7e36: 30 93 85 00 sts 0x0085, r19
7e3a: 20 93 84 00 sts 0x0084, r18
TIFR1 = _BV(TOV1);
7e3e: 96 bb out 0x16, r25 ; 22
while(!(TIFR1 & _BV(TOV1)));
7e40: b0 9b sbis 0x16, 0 ; 22
7e42: fe cf rjmp .-4 ; 0x7e40 <main+0x40>
#ifdef __AVR_ATmega8__
LED_PORT ^= _BV(LED);
#else
LED_PIN |= _BV(LED);
7e44: 1d 9a sbi 0x03, 5 ; 3
}
#endif
// Watchdog functions. These are only safe with interrupts turned off.
void watchdogReset() {
__asm__ __volatile__ (
7e46: a8 95 wdr
LED_PORT ^= _BV(LED);
#else
LED_PIN |= _BV(LED);
#endif
watchdogReset();
} while (--count);
7e48: 81 50 subi r24, 0x01 ; 1
7e4a: a9 f7 brne .-22 ; 0x7e36 <main+0x36>
7e4c: cc 24 eor r12, r12
7e4e: 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);
7e50: 88 24 eor r8, r8
7e52: 83 94 inc r8
addrPtr += 2;
} while (--ch);
// Write from programming buffer
__boot_page_write_short((uint16_t)(void*)address);
7e54: b5 e0 ldi r27, 0x05 ; 5
7e56: ab 2e mov r10, r27
boot_spm_busy_wait();
#if defined(RWWSRE)
// Reenable read access to flash
boot_rww_enable();
7e58: a1 e1 ldi r26, 0x11 ; 17
7e5a: 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);
7e5c: f3 e0 ldi r31, 0x03 ; 3
7e5e: bf 2e mov r11, r31
#endif
/* Forever loop */
for (;;) {
/* get character from UART */
ch = getch();
7e60: a2 d0 rcall .+324 ; 0x7fa6 <getch>
if(ch == STK_GET_PARAMETER) {
7e62: 81 34 cpi r24, 0x41 ; 65
7e64: 61 f4 brne .+24 ; 0x7e7e <main+0x7e>
unsigned char which = getch();
7e66: 9f d0 rcall .+318 ; 0x7fa6 <getch>
7e68: 08 2f mov r16, r24
verifySpace();
7e6a: af d0 rcall .+350 ; 0x7fca <verifySpace>
if (which == 0x82) {
7e6c: 02 38 cpi r16, 0x82 ; 130
7e6e: 11 f0 breq .+4 ; 0x7e74 <main+0x74>
/*
* Send optiboot version as "minor SW version"
*/
putch(OPTIBOOT_MINVER);
} else if (which == 0x81) {
7e70: 01 38 cpi r16, 0x81 ; 129
7e72: 11 f4 brne .+4 ; 0x7e78 <main+0x78>
putch(OPTIBOOT_MAJVER);
7e74: 84 e0 ldi r24, 0x04 ; 4
7e76: 01 c0 rjmp .+2 ; 0x7e7a <main+0x7a>
} else {
/*
* GET PARAMETER returns a generic 0x03 reply for
* other parameters - enough to keep Avrdude happy
*/
putch(0x03);
7e78: 83 e0 ldi r24, 0x03 ; 3
7e7a: 8d d0 rcall .+282 ; 0x7f96 <putch>
7e7c: 89 c0 rjmp .+274 ; 0x7f90 <main+0x190>
}
}
else if(ch == STK_SET_DEVICE) {
7e7e: 82 34 cpi r24, 0x42 ; 66
7e80: 11 f4 brne .+4 ; 0x7e86 <main+0x86>
// SET DEVICE is ignored
getNch(20);
7e82: 84 e1 ldi r24, 0x14 ; 20
7e84: 03 c0 rjmp .+6 ; 0x7e8c <main+0x8c>
}
else if(ch == STK_SET_DEVICE_EXT) {
7e86: 85 34 cpi r24, 0x45 ; 69
7e88: 19 f4 brne .+6 ; 0x7e90 <main+0x90>
// SET DEVICE EXT is ignored
getNch(5);
7e8a: 85 e0 ldi r24, 0x05 ; 5
7e8c: a6 d0 rcall .+332 ; 0x7fda <getNch>
7e8e: 80 c0 rjmp .+256 ; 0x7f90 <main+0x190>
}
else if(ch == STK_LOAD_ADDRESS) {
7e90: 85 35 cpi r24, 0x55 ; 85
7e92: 79 f4 brne .+30 ; 0x7eb2 <main+0xb2>
// LOAD ADDRESS
uint16_t newAddress;
newAddress = getch();
7e94: 88 d0 rcall .+272 ; 0x7fa6 <getch>
newAddress = (newAddress & 0xff) | (getch() << 8);
7e96: e8 2e mov r14, r24
7e98: ff 24 eor r15, r15
7e9a: 85 d0 rcall .+266 ; 0x7fa6 <getch>
7e9c: 08 2f mov r16, r24
7e9e: 10 e0 ldi r17, 0x00 ; 0
7ea0: 10 2f mov r17, r16
7ea2: 00 27 eor r16, r16
7ea4: 0e 29 or r16, r14
7ea6: 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
7ea8: 00 0f add r16, r16
7eaa: 11 1f adc r17, r17
address = newAddress;
verifySpace();
7eac: 8e d0 rcall .+284 ; 0x7fca <verifySpace>
7eae: 68 01 movw r12, r16
7eb0: 6f c0 rjmp .+222 ; 0x7f90 <main+0x190>
}
else if(ch == STK_UNIVERSAL) {
7eb2: 86 35 cpi r24, 0x56 ; 86
7eb4: 21 f4 brne .+8 ; 0x7ebe <main+0xbe>
// UNIVERSAL command is ignored
getNch(4);
7eb6: 84 e0 ldi r24, 0x04 ; 4
7eb8: 90 d0 rcall .+288 ; 0x7fda <getNch>
putch(0x00);
7eba: 80 e0 ldi r24, 0x00 ; 0
7ebc: de cf rjmp .-68 ; 0x7e7a <main+0x7a>
}
/* Write memory, length is big endian and is in bytes */
else if(ch == STK_PROG_PAGE) {
7ebe: 84 36 cpi r24, 0x64 ; 100
7ec0: 09 f0 breq .+2 ; 0x7ec4 <main+0xc4>
7ec2: 40 c0 rjmp .+128 ; 0x7f44 <main+0x144>
// PROGRAM PAGE - we support flash programming only, not EEPROM
uint8_t *bufPtr;
uint16_t addrPtr;
getch(); /* getlen() */
7ec4: 70 d0 rcall .+224 ; 0x7fa6 <getch>
length = getch();
7ec6: 6f d0 rcall .+222 ; 0x7fa6 <getch>
7ec8: 08 2f mov r16, r24
getch();
7eca: 6d d0 rcall .+218 ; 0x7fa6 <getch>
// If we are in RWW section, immediately start page erase
if (address < NRWWSTART) __boot_page_erase_short((uint16_t)(void*)address);
7ecc: 80 e0 ldi r24, 0x00 ; 0
7ece: c8 16 cp r12, r24
7ed0: 80 e7 ldi r24, 0x70 ; 112
7ed2: d8 06 cpc r13, r24
7ed4: 18 f4 brcc .+6 ; 0x7edc <main+0xdc>
7ed6: f6 01 movw r30, r12
7ed8: b7 be out 0x37, r11 ; 55
7eda: e8 95 spm
7edc: c0 e0 ldi r28, 0x00 ; 0
7ede: d1 e0 ldi r29, 0x01 ; 1
// While that is going on, read in page contents
bufPtr = buff;
do *bufPtr++ = getch();
7ee0: 62 d0 rcall .+196 ; 0x7fa6 <getch>
7ee2: 89 93 st Y+, r24
while (--length);
7ee4: 0c 17 cp r16, r28
7ee6: e1 f7 brne .-8 ; 0x7ee0 <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);
7ee8: f0 e0 ldi r31, 0x00 ; 0
7eea: cf 16 cp r12, r31
7eec: f0 e7 ldi r31, 0x70 ; 112
7eee: df 06 cpc r13, r31
7ef0: 18 f0 brcs .+6 ; 0x7ef8 <main+0xf8>
7ef2: f6 01 movw r30, r12
7ef4: b7 be out 0x37, r11 ; 55
7ef6: e8 95 spm
// Read command terminator, start reply
verifySpace();
7ef8: 68 d0 rcall .+208 ; 0x7fca <verifySpace>
// If only a partial page is to be programmed, the erase might not be complete.
// So check that here
boot_spm_busy_wait();
7efa: 07 b6 in r0, 0x37 ; 55
7efc: 00 fc sbrc r0, 0
7efe: fd cf rjmp .-6 ; 0x7efa <main+0xfa>
7f00: a6 01 movw r20, r12
7f02: a0 e0 ldi r26, 0x00 ; 0
7f04: b1 e0 ldi r27, 0x01 ; 1
bufPtr = buff;
addrPtr = (uint16_t)(void*)address;
ch = SPM_PAGESIZE / 2;
do {
uint16_t a;
a = *bufPtr++;
7f06: 2c 91 ld r18, X
7f08: 30 e0 ldi r19, 0x00 ; 0
a |= (*bufPtr++) << 8;
7f0a: 11 96 adiw r26, 0x01 ; 1
7f0c: 8c 91 ld r24, X
7f0e: 11 97 sbiw r26, 0x01 ; 1
7f10: 90 e0 ldi r25, 0x00 ; 0
7f12: 98 2f mov r25, r24
7f14: 88 27 eor r24, r24
7f16: 82 2b or r24, r18
7f18: 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) {
7f1a: 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);
7f1c: fa 01 movw r30, r20
7f1e: 0c 01 movw r0, r24
7f20: 87 be out 0x37, r8 ; 55
7f22: e8 95 spm
7f24: 11 24 eor r1, r1
addrPtr += 2;
7f26: 4e 5f subi r20, 0xFE ; 254
7f28: 5f 4f sbci r21, 0xFF ; 255
} while (--ch);
7f2a: f1 e0 ldi r31, 0x01 ; 1
7f2c: a0 38 cpi r26, 0x80 ; 128
7f2e: bf 07 cpc r27, r31
7f30: 51 f7 brne .-44 ; 0x7f06 <main+0x106>
// Write from programming buffer
__boot_page_write_short((uint16_t)(void*)address);
7f32: f6 01 movw r30, r12
7f34: a7 be out 0x37, r10 ; 55
7f36: e8 95 spm
boot_spm_busy_wait();
7f38: 07 b6 in r0, 0x37 ; 55
7f3a: 00 fc sbrc r0, 0
7f3c: fd cf rjmp .-6 ; 0x7f38 <main+0x138>
#if defined(RWWSRE)
// Reenable read access to flash
boot_rww_enable();
7f3e: 97 be out 0x37, r9 ; 55
7f40: e8 95 spm
7f42: 26 c0 rjmp .+76 ; 0x7f90 <main+0x190>
#endif
}
/* Read memory block mode, length is big endian. */
else if(ch == STK_READ_PAGE) {
7f44: 84 37 cpi r24, 0x74 ; 116
7f46: b1 f4 brne .+44 ; 0x7f74 <main+0x174>
// READ PAGE - we only read flash
getch(); /* getlen() */
7f48: 2e d0 rcall .+92 ; 0x7fa6 <getch>
length = getch();
7f4a: 2d d0 rcall .+90 ; 0x7fa6 <getch>
7f4c: f8 2e mov r15, r24
getch();
7f4e: 2b d0 rcall .+86 ; 0x7fa6 <getch>
verifySpace();
7f50: 3c d0 rcall .+120 ; 0x7fca <verifySpace>
7f52: f6 01 movw r30, r12
7f54: ef 2c mov r14, r15
putch(result);
address++;
}
while (--length);
#else
do putch(pgm_read_byte_near(address++));
7f56: 8f 01 movw r16, r30
7f58: 0f 5f subi r16, 0xFF ; 255
7f5a: 1f 4f sbci r17, 0xFF ; 255
7f5c: 84 91 lpm r24, Z+
7f5e: 1b d0 rcall .+54 ; 0x7f96 <putch>
while (--length);
7f60: ea 94 dec r14
7f62: f8 01 movw r30, r16
7f64: c1 f7 brne .-16 ; 0x7f56 <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) {
7f66: 08 94 sec
7f68: c1 1c adc r12, r1
7f6a: d1 1c adc r13, r1
7f6c: fa 94 dec r15
7f6e: cf 0c add r12, r15
7f70: d1 1c adc r13, r1
7f72: 0e c0 rjmp .+28 ; 0x7f90 <main+0x190>
#endif
#endif
}
/* Get device signature bytes */
else if(ch == STK_READ_SIGN) {
7f74: 85 37 cpi r24, 0x75 ; 117
7f76: 39 f4 brne .+14 ; 0x7f86 <main+0x186>
// READ SIGN - return what Avrdude wants to hear
verifySpace();
7f78: 28 d0 rcall .+80 ; 0x7fca <verifySpace>
putch(SIGNATURE_0);
7f7a: 8e e1 ldi r24, 0x1E ; 30
7f7c: 0c d0 rcall .+24 ; 0x7f96 <putch>
putch(SIGNATURE_1);
7f7e: 85 e9 ldi r24, 0x95 ; 149
7f80: 0a d0 rcall .+20 ; 0x7f96 <putch>
putch(SIGNATURE_2);
7f82: 8f e0 ldi r24, 0x0F ; 15
7f84: 7a cf rjmp .-268 ; 0x7e7a <main+0x7a>
}
else if (ch == 'Q') {
7f86: 81 35 cpi r24, 0x51 ; 81
7f88: 11 f4 brne .+4 ; 0x7f8e <main+0x18e>
// Adaboot no-wait mod
watchdogConfig(WATCHDOG_16MS);
7f8a: 88 e0 ldi r24, 0x08 ; 8
7f8c: 18 d0 rcall .+48 ; 0x7fbe <watchdogConfig>
verifySpace();
}
else {
// This covers the response to commands like STK_ENTER_PROGMODE
verifySpace();
7f8e: 1d d0 rcall .+58 ; 0x7fca <verifySpace>
}
putch(STK_OK);
7f90: 80 e1 ldi r24, 0x10 ; 16
7f92: 01 d0 rcall .+2 ; 0x7f96 <putch>
7f94: 65 cf rjmp .-310 ; 0x7e60 <main+0x60>
00007f96 <putch>:
}
}
void putch(char ch) {
7f96: 98 2f mov r25, r24
#ifndef SOFT_UART
while (!(UCSR0A & _BV(UDRE0)));
7f98: 80 91 c0 00 lds r24, 0x00C0
7f9c: 85 ff sbrs r24, 5
7f9e: fc cf rjmp .-8 ; 0x7f98 <putch+0x2>
UDR0 = ch;
7fa0: 90 93 c6 00 sts 0x00C6, r25
[uartBit] "I" (UART_TX_BIT)
:
"r25"
);
#endif
}
7fa4: 08 95 ret
00007fa6 <getch>:
[uartBit] "I" (UART_RX_BIT)
:
"r25"
);
#else
while(!(UCSR0A & _BV(RXC0)))
7fa6: 80 91 c0 00 lds r24, 0x00C0
7faa: 87 ff sbrs r24, 7
7fac: fc cf rjmp .-8 ; 0x7fa6 <getch>
;
if (!(UCSR0A & _BV(FE0))) {
7fae: 80 91 c0 00 lds r24, 0x00C0
7fb2: 84 fd sbrc r24, 4
7fb4: 01 c0 rjmp .+2 ; 0x7fb8 <getch+0x12>
}
#endif
// Watchdog functions. These are only safe with interrupts turned off.
void watchdogReset() {
__asm__ __volatile__ (
7fb6: a8 95 wdr
* don't care that an invalid char is returned...)
*/
watchdogReset();
}
ch = UDR0;
7fb8: 80 91 c6 00 lds r24, 0x00C6
LED_PIN |= _BV(LED);
#endif
#endif
return ch;
}
7fbc: 08 95 ret
00007fbe <watchdogConfig>:
"wdr\n"
);
}
void watchdogConfig(uint8_t x) {
WDTCSR = _BV(WDCE) | _BV(WDE);
7fbe: e0 e6 ldi r30, 0x60 ; 96
7fc0: f0 e0 ldi r31, 0x00 ; 0
7fc2: 98 e1 ldi r25, 0x18 ; 24
7fc4: 90 83 st Z, r25
WDTCSR = x;
7fc6: 80 83 st Z, r24
}
7fc8: 08 95 ret
00007fca <verifySpace>:
do getch(); while (--count);
verifySpace();
}
void verifySpace() {
if (getch() != CRC_EOP) {
7fca: ed df rcall .-38 ; 0x7fa6 <getch>
7fcc: 80 32 cpi r24, 0x20 ; 32
7fce: 19 f0 breq .+6 ; 0x7fd6 <verifySpace+0xc>
watchdogConfig(WATCHDOG_16MS); // shorten WD timeout
7fd0: 88 e0 ldi r24, 0x08 ; 8
7fd2: f5 df rcall .-22 ; 0x7fbe <watchdogConfig>
7fd4: ff cf rjmp .-2 ; 0x7fd4 <verifySpace+0xa>
while (1) // and busy-loop so that WD causes
; // a reset and app start.
}
putch(STK_INSYNC);
7fd6: 84 e1 ldi r24, 0x14 ; 20
}
7fd8: de cf rjmp .-68 ; 0x7f96 <putch>
00007fda <getNch>:
::[count] "M" (UART_B_VALUE)
);
}
#endif
void getNch(uint8_t count) {
7fda: 1f 93 push r17
7fdc: 18 2f mov r17, r24
do getch(); while (--count);
7fde: e3 df rcall .-58 ; 0x7fa6 <getch>
7fe0: 11 50 subi r17, 0x01 ; 1
7fe2: e9 f7 brne .-6 ; 0x7fde <getNch+0x4>
verifySpace();
7fe4: f2 df rcall .-28 ; 0x7fca <verifySpace>
}
7fe6: 1f 91 pop r17
7fe8: 08 95 ret
00007fea <appStart>:
WDTCSR = _BV(WDCE) | _BV(WDE);
WDTCSR = x;
}
void appStart() {
watchdogConfig(WATCHDOG_OFF);
7fea: 80 e0 ldi r24, 0x00 ; 0
7fec: e8 df rcall .-48 ; 0x7fbe <watchdogConfig>
__asm__ __volatile__ (
7fee: ee 27 eor r30, r30
7ff0: ff 27 eor r31, r31
7ff2: 09 94 ijmp
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