The Internet is full of examples of how to flash Atmel microcontrollers using Arduino, very easily converting the latter into an ISP programmer.
I need the opposite task - to get the firmware from the Atmel microcontroller, and specifically from the Atmega 8 16 AI.
What board is that? Aniway, if the copyprotect bit it set it won't work. But you could flash your own program.
This is an RDAC module, using a simple ADC for reading analog parameters from speed sensors, thermocouples or pressure sensors.
I hope there is no protection for copying the firmware, but I haven’t even gotten to this step yet...
No, you can try it with an Arduino.
However, as mentioned above, if your Atmega8 was a part of commercial device - you have a liitle chances to read the firmware.
I don’t want to seem rude, but I asked a question about the technical possibility of using an Arduino Leonardo as a device for reading firmware.
Whether it is possible or not to be closed on the target device is a mystery to me, as well as to you.
I don’t yet understand the algorithm for how to do this “in principle” - all the examples from the Internet boil down to flashing the device’s firmware, and not downloading the firmware from it.
That’s why the question was asked, because there are concerns that it is impossible to unload the firmware from the device using Arduino IDE.
Please tell me how to download the firmware from the device using Arduino IDE?
not with Arduino IDE, but with arduino board as programmer.
The tool that you need to extract the firmware is avrdude
See the link (it about the Mega, but the principles the same for every AVR chip)
Take the note, that the code you will extract from the chip has nothing similar to C++ sourcecode and hardly can be edited.
Sorry if what I say is obvious things for you.
It’s okay, we on the forum still respect each other, even though we are located at great distances.
Yes, I understand the mechanisms and that you cannot get the source code from the microcontroller, but only *hex.
I just need the firmware because I want to write my own but need to keep the original one.
In that case ArduinoISP may work, but you'd need to solder RESET (PC6) directly on the chip. In case you want hardware serial you'd have to cut the trace between PD0 and PD1 and solder a wire to PD0. And check if the uC is powerd by 5V or 3.3
pin 13 and SCK, pin 12 and MISO, pin 11 and MOSI, pin 10 and RCT.
I flashed the Arduino Leonardo board with the ArduinoISP sketch.
1.1 Uncomment #define SPI_CLOCK (128000/6)
Exported blink from Arduino IDE in *hex file
I’m trying to flash atmega328p, which is Nano, via ISP using avrdude:
avrdude -v -p atmega328p -c arduino -P com7 -U flash:w:blink.hex:i
I get this answer:
avrdude: Version 7.3
Copyright the AVRDUDE authors;
see https://github.com/avrdudes/avrdude/blob/main/AUTHORS
System wide configuration file is D:\Downloads\avrdude.conf
Using port : com7
Using programmer : arduino
AVR Part : ATmega328P
Programming modes : ISP, HVPP, debugWIRE, SPM
Programmer Type : Arduino
Description : Arduino for bootloader using STK500 v1 protocol
HW Version : 2
FW Version : 1.18
Topcard : Unknown
avrdude: AVR device initialized and ready to accept instructions
avrdude: device signature = 0xffffff (probably .xmega) (retrying)
avrdude: device signature = 0xffffff (probably .xmega) (retrying)
avrdude: device signature = 0xffffff (probably .xmega)
avrdude main() error: Yikes! Invalid device signature.
avrdude main() error: expected signature for ATmega328P is 1E 95 0F
Double check connections and try again, or use -F to override
this check.
avrdude done. Thank you.
If I add the -F flag:
The firmware will start, but nothing will load into the Nano.
Perhaps I need to connect the pins not to the usual Arduino Leonardo combs, but directly to the six-pin ISP connector?
...
I’m already thinking of giving up on this stupid idea and just buying a USBASP programmer 
0xffffff
You have proably swapped miso and mosi
To my regret, I tried to change it, but to no avail.
I'll try to solder the wires, now the connections are just "dupont wires".
Firmware via USB for Arduino Nano from Arduino IDE is unstable, yesterday it happened a couple of times, and today it’s error after error, like this post.
Perhaps the reason was the update of Avrdude to version 7.3.
Perhaps I removed the bootloader from the nano board when I loaded the firmware into it using the ISP programmer.
Moreover, the Arduino IDE is strangely structured; it has a folder on the system disk where standard files are stored, incl. and avrdude, and there is also a hidden directory for Arduino15, where basically all the files, frameworks, etc. are located.
It’s not clear to me from which directory Arduino IDE loads Avrdude for work, so I didn’t look into it too much, it works in the console version of Avrdude and it’s a success!
It turned out to connect and read the firmware from the Nano board, with Atmega328P on board, to the programmer based on the Arduino Leonardo debug board.
Because Since I was connecting two boards with dupont wires, I could choose to connect to the standard side pins on the Leonardo board, as well as to a separate ISP connector.
I chose the first, and initially this option did not work for me until I uncommented the definition in the code of the ArduinoISP sketch:
#define USE_OLD_STYLE_WIRING
I read the firmware using the console utility Avrdude, and compare the resulting *hex files.
avrdude -v -p atmega328p -c arduino -P com7 -U flash:r:blink2_1.hex:i
avrdude: Version 7.3
Copyright the AVRDUDE authors;
see https://github.com/avrdudes/avrdude/blob/main/AUTHORS
System wide configuration file is D:\Downloads\avrdude.conf
Using port : com7
Using programmer : arduino
AVR Part : ATmega328P
Programming modes : ISP, HVPP, debugWIRE, SPM
Programmer Type : Arduino
Description : Arduino for bootloader using STK500 v1 protocol
HW Version : 2
FW Version : 1.18
Topcard : Unknown
avrdude: AVR device initialized and ready to accept instructions
avrdude: device signature = 0x1e950f (probably m328p)
avrdude: processing -U flash:r:blink2_1.hex:i
avrdude: reading flash memory ...
Reading | ################################################## | 100% 75.27 s
avrdude: writing output file blink2_2_1.hex
avrdude done. Thank you.
For some reason, when reading a firmware dump using Avrdude, the file size is always 77 kB, while when I get the firmware using Arduino IDE
avrdude -v -p atmega328p -c arduino -P com7 -b19200 -U flash:w:blink2_1.hex:i
avrdude: Version 7.3
Copyright the AVRDUDE authors;
see https://github.com/avrdudes/avrdude/blob/main/AUTHORS
System wide configuration file is D:\Downloads\avrdude.conf
Using port : com7
Using programmer : arduino
Setting baud rate : 19200
AVR Part : ATmega328P
Programming modes : ISP, HVPP, debugWIRE, SPM
Programmer Type : Arduino
Description : Arduino for bootloader using STK500 v1 protocol
HW Version : 2
FW Version : 1.18
Topcard : Unknown
avrdude: AVR device initialized and ready to accept instructions
avrdude: device signature = 0x1e950f (probably m328p)
avrdude: Note: flash memory has been specified, an erase cycle will be performed.
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: processing -U flash:w:blink2_1.hex:i
avrdude: reading input file blink2_1.hex for flash
with 922 bytes in 1 section within [0, 0x399]
using 8 pages and 102 pad bytes
avrdude: writing 922 bytes flash ...
Writing | ################################################## | 100% 2.90 s
avrdude: 922 bytes of flash written
avrdude: verifying flash memory against blink2_1.hex
Reading | ################################################## | 100% 2.35 s
avrdude: 922 bytes of flash verified
avrdude done. Thank you.
Perhaps I’m not operating the Avrdude flags correctly, or is there another reason?
I also want to figure out the Avr-objdump utility, maybe I’ll be able to parse the firmware down to the assembler to understand what’s happening in the code.
.........................................................................................................................................
I played a little with code, compilation, firmware, firmware reading and decompilation.
The following code:
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(200); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(200); // wait for a second
}
Compiles into this firmware.
blink2_1.zip (1,1 КБ)
Hex here:
:100000000C945C000C946E000C946E000C946E00CA
:100010000C946E000C946E000C946E000C946E00A8
:100020000C946E000C946E000C946E000C946E0098
:100030000C946E000C946E000C946E000C946E0088
:100040000C9412010C946E000C946E000C946E00D3
:100050000C946E000C946E000C946E000C946E0068
:100060000C946E000C946E00000000002400270029
:100070002A0000000000250028002B0004040404CE
:100080000404040402020202020203030303030342
:10009000010204081020408001020408102001021F
:1000A00004081020000000080002010000030407FB
:1000B000000000000000000011241FBECFEFD8E0B8
:1000C000DEBFCDBF21E0A0E0B1E001C01D92A930AC
:1000D000B207E1F70E945C010C94CB010C94000084
:1000E000E1EBF0E02491EDE9F0E09491E9E8F0E053
:1000F000E491EE23C9F0222339F0233001F1A8F472
:10010000213019F1223029F1F0E0EE0FFF1FEE58F7
:10011000FF4FA591B4912FB7F894EC91811126C0AF
:1001200090959E239C932FBF08952730A9F02830E7
:10013000C9F0243049F7209180002F7D03C0209121
:1001400080002F7720938000DFCF24B52F7724BD48
:10015000DBCF24B52F7DFBCF2091B0002F772093EC
:10016000B000D2CF2091B0002F7DF9CF9E2BDACFF7
:100170003FB7F8948091050190910601A091070185
:10018000B091080126B5A89B05C02F3F19F0019634
:10019000A11DB11D3FBFBA2FA92F982F8827BC01E1
:1001A000CD01620F711D811D911D42E0660F771F09
:1001B000881F991F4A95D1F708958F929F92AF9209
:1001C000BF92CF92DF92EF92FF920E94B8004B0154
:1001D0005C0188ECC82ED12CE12CF12C0E94B800D7
:1001E000681979098A099B09683E73408105910560
:1001F000A8F321E0C21AD108E108F10888EE880EC0
:1002000083E0981EA11CB11CC114D104E104F104C7
:1002100029F7FF90EF90DF90CF90BF90AF909F9025
:100220008F9008951F920F920FB60F9211242F9363
:100230003F938F939F93AF93BF93809101019091D0
:100240000201A0910301B09104013091000123E06B
:10025000230F2D3758F50196A11DB11D20930001E4
:100260008093010190930201A0930301B0930401D4
:100270008091050190910601A0910701B0910801BC
:100280000196A11DB11D8093050190930601A093D5
:100290000701B0930801BF91AF919F918F913F915A
:1002A0002F910F900FBE0F901F90189526E8230FE7
:1002B0000296A11DB11DD2CF789484B5826084BD11
:1002C00084B5816084BD85B5826085BD85B581605A
:1002D00085BD80916E00816080936E0010928100D8
:1002E0008091810082608093810080918100816093
:1002F0008093810080918000816080938000809154
:10030000B10084608093B1008091B00081608093DF
:10031000B00080917A00846080937A0080917A00A6
:10032000826080937A0080917A00816080937A0065
:1003300080917A00806880937A001092C100EDE984
:10034000F0E02491E9E8F0E08491882399F090E0CE
:10035000880F991FFC01E859FF4FA591B491FC014A
:10036000EE58FF4F859194918FB7F894EC91E22B62
:10037000EC938FBFC0E0D0E081E00E9470000E944B
:10038000DD0080E00E9470000E94DD002097A1F354
:0A0390000E940000F1CFF894FFCFA7
:00000001FF
Disassembling here:
avr-objdump -j .sec1 -d -m avr blink2_1.hex
blink2_1.hex: file format ihex
Disassembly of section .sec1:
00000000 <.sec1>:
0: 0c 94 5c 00 jmp 0xb8 ; 0xb8
4: 0c 94 6e 00 jmp 0xdc ; 0xdc
8: 0c 94 6e 00 jmp 0xdc ; 0xdc
c: 0c 94 6e 00 jmp 0xdc ; 0xdc
10: 0c 94 6e 00 jmp 0xdc ; 0xdc
14: 0c 94 6e 00 jmp 0xdc ; 0xdc
18: 0c 94 6e 00 jmp 0xdc ; 0xdc
1c: 0c 94 6e 00 jmp 0xdc ; 0xdc
20: 0c 94 6e 00 jmp 0xdc ; 0xdc
24: 0c 94 6e 00 jmp 0xdc ; 0xdc
28: 0c 94 6e 00 jmp 0xdc ; 0xdc
2c: 0c 94 6e 00 jmp 0xdc ; 0xdc
30: 0c 94 6e 00 jmp 0xdc ; 0xdc
34: 0c 94 6e 00 jmp 0xdc ; 0xdc
38: 0c 94 6e 00 jmp 0xdc ; 0xdc
3c: 0c 94 6e 00 jmp 0xdc ; 0xdc
40: 0c 94 12 01 jmp 0x224 ; 0x224
44: 0c 94 6e 00 jmp 0xdc ; 0xdc
48: 0c 94 6e 00 jmp 0xdc ; 0xdc
4c: 0c 94 6e 00 jmp 0xdc ; 0xdc
50: 0c 94 6e 00 jmp 0xdc ; 0xdc
54: 0c 94 6e 00 jmp 0xdc ; 0xdc
58: 0c 94 6e 00 jmp 0xdc ; 0xdc
5c: 0c 94 6e 00 jmp 0xdc ; 0xdc
60: 0c 94 6e 00 jmp 0xdc ; 0xdc
64: 0c 94 6e 00 jmp 0xdc ; 0xdc
68: 00 00 nop
6a: 00 00 nop
6c: 24 00 .word 0x0024 ; ????
6e: 27 00 .word 0x0027 ; ????
70: 2a 00 .word 0x002a ; ????
72: 00 00 nop
74: 00 00 nop
76: 25 00 .word 0x0025 ; ????
78: 28 00 .word 0x0028 ; ????
7a: 2b 00 .word 0x002b ; ????
7c: 04 04 cpc r0, r4
7e: 04 04 cpc r0, r4
80: 04 04 cpc r0, r4
82: 04 04 cpc r0, r4
84: 02 02 muls r16, r18
86: 02 02 muls r16, r18
88: 02 02 muls r16, r18
8a: 03 03 mulsu r16, r19
8c: 03 03 mulsu r16, r19
8e: 03 03 mulsu r16, r19
90: 01 02 muls r16, r17
92: 04 08 sbc r0, r4
94: 10 20 and r1, r0
96: 40 80 ld r4, Z
98: 01 02 muls r16, r17
9a: 04 08 sbc r0, r4
9c: 10 20 and r1, r0
9e: 01 02 muls r16, r17
a0: 04 08 sbc r0, r4
a2: 10 20 and r1, r0
a4: 00 00 nop
a6: 00 08 sbc r0, r0
a8: 00 02 muls r16, r16
aa: 01 00 .word 0x0001 ; ????
ac: 00 03 mulsu r16, r16
ae: 04 07 cpc r16, r20
...
b8: 11 24 eor r1, r1
ba: 1f be out 0x3f, r1 ; 63
bc: cf ef ldi r28, 0xFF ; 255
be: d8 e0 ldi r29, 0x08 ; 8
c0: de bf out 0x3e, r29 ; 62
c2: cd bf out 0x3d, r28 ; 61
c4: 21 e0 ldi r18, 0x01 ; 1
c6: a0 e0 ldi r26, 0x00 ; 0
c8: b1 e0 ldi r27, 0x01 ; 1
ca: 01 c0 rjmp .+2 ; 0xce
cc: 1d 92 st X+, r1
ce: a9 30 cpi r26, 0x09 ; 9
d0: b2 07 cpc r27, r18
d2: e1 f7 brne .-8 ; 0xcc
d4: 0e 94 5c 01 call 0x2b8 ; 0x2b8
d8: 0c 94 cb 01 jmp 0x396 ; 0x396
dc: 0c 94 00 00 jmp 0 ; 0x0
e0: e1 eb ldi r30, 0xB1 ; 177
e2: f0 e0 ldi r31, 0x00 ; 0
e4: 24 91 lpm r18, Z
e6: ed e9 ldi r30, 0x9D ; 157
e8: f0 e0 ldi r31, 0x00 ; 0
ea: 94 91 lpm r25, Z
ec: e9 e8 ldi r30, 0x89 ; 137
ee: f0 e0 ldi r31, 0x00 ; 0
f0: e4 91 lpm r30, Z
f2: ee 23 and r30, r30
f4: c9 f0 breq .+50 ; 0x128
f6: 22 23 and r18, r18
f8: 39 f0 breq .+14 ; 0x108
fa: 23 30 cpi r18, 0x03 ; 3
fc: 01 f1 breq .+64 ; 0x13e
fe: a8 f4 brcc .+42 ; 0x12a
100: 21 30 cpi r18, 0x01 ; 1
102: 19 f1 breq .+70 ; 0x14a
104: 22 30 cpi r18, 0x02 ; 2
106: 29 f1 breq .+74 ; 0x152
108: f0 e0 ldi r31, 0x00 ; 0
10a: ee 0f add r30, r30
10c: ff 1f adc r31, r31
10e: ee 58 subi r30, 0x8E ; 142
110: ff 4f sbci r31, 0xFF ; 255
112: a5 91 lpm r26, Z+
114: b4 91 lpm r27, Z
116: 2f b7 in r18, 0x3f ; 63
118: f8 94 cli
11a: ec 91 ld r30, X
11c: 81 11 cpse r24, r1
11e: 26 c0 rjmp .+76 ; 0x16c
120: 90 95 com r25
122: 9e 23 and r25, r30
124: 9c 93 st X, r25
126: 2f bf out 0x3f, r18 ; 63
128: 08 95 ret
12a: 27 30 cpi r18, 0x07 ; 7
12c: a9 f0 breq .+42 ; 0x158
12e: 28 30 cpi r18, 0x08 ; 8
130: c9 f0 breq .+50 ; 0x164
132: 24 30 cpi r18, 0x04 ; 4
134: 49 f7 brne .-46 ; 0x108
136: 20 91 80 00 lds r18, 0x0080 ; 0x800080
13a: 2f 7d andi r18, 0xDF ; 223
13c: 03 c0 rjmp .+6 ; 0x144
13e: 20 91 80 00 lds r18, 0x0080 ; 0x800080
142: 2f 77 andi r18, 0x7F ; 127
144: 20 93 80 00 sts 0x0080, r18 ; 0x800080
148: df cf rjmp .-66 ; 0x108
14a: 24 b5 in r18, 0x24 ; 36
14c: 2f 77 andi r18, 0x7F ; 127
14e: 24 bd out 0x24, r18 ; 36
150: db cf rjmp .-74 ; 0x108
152: 24 b5 in r18, 0x24 ; 36
154: 2f 7d andi r18, 0xDF ; 223
156: fb cf rjmp .-10 ; 0x14e
158: 20 91 b0 00 lds r18, 0x00B0 ; 0x8000b0
15c: 2f 77 andi r18, 0x7F ; 127
15e: 20 93 b0 00 sts 0x00B0, r18 ; 0x8000b0
162: d2 cf rjmp .-92 ; 0x108
164: 20 91 b0 00 lds r18, 0x00B0 ; 0x8000b0
168: 2f 7d andi r18, 0xDF ; 223
16a: f9 cf rjmp .-14 ; 0x15e
16c: 9e 2b or r25, r30
16e: da cf rjmp .-76 ; 0x124
170: 3f b7 in r19, 0x3f ; 63
172: f8 94 cli
174: 80 91 05 01 lds r24, 0x0105 ; 0x800105
178: 90 91 06 01 lds r25, 0x0106 ; 0x800106
17c: a0 91 07 01 lds r26, 0x0107 ; 0x800107
180: b0 91 08 01 lds r27, 0x0108 ; 0x800108
184: 26 b5 in r18, 0x26 ; 38
186: a8 9b sbis 0x15, 0 ; 21
188: 05 c0 rjmp .+10 ; 0x194
18a: 2f 3f cpi r18, 0xFF ; 255
18c: 19 f0 breq .+6 ; 0x194
18e: 01 96 adiw r24, 0x01 ; 1
190: a1 1d adc r26, r1
192: b1 1d adc r27, r1
194: 3f bf out 0x3f, r19 ; 63
196: ba 2f mov r27, r26
198: a9 2f mov r26, r25
19a: 98 2f mov r25, r24
19c: 88 27 eor r24, r24
19e: bc 01 movw r22, r24
1a0: cd 01 movw r24, r26
1a2: 62 0f add r22, r18
1a4: 71 1d adc r23, r1
1a6: 81 1d adc r24, r1
1a8: 91 1d adc r25, r1
1aa: 42 e0 ldi r20, 0x02 ; 2
1ac: 66 0f add r22, r22
1ae: 77 1f adc r23, r23
1b0: 88 1f adc r24, r24
1b2: 99 1f adc r25, r25
1b4: 4a 95 dec r20
1b6: d1 f7 brne .-12 ; 0x1ac
1b8: 08 95 ret
1ba: 8f 92 push r8
1bc: 9f 92 push r9
1be: af 92 push r10
1c0: bf 92 push r11
1c2: cf 92 push r12
1c4: df 92 push r13
1c6: ef 92 push r14
1c8: ff 92 push r15
1ca: 0e 94 b8 00 call 0x170 ; 0x170
1ce: 4b 01 movw r8, r22
1d0: 5c 01 movw r10, r24
1d2: 88 ec ldi r24, 0xC8 ; 200
1d4: c8 2e mov r12, r24
1d6: d1 2c mov r13, r1
1d8: e1 2c mov r14, r1
1da: f1 2c mov r15, r1
1dc: 0e 94 b8 00 call 0x170 ; 0x170
1e0: 68 19 sub r22, r8
1e2: 79 09 sbc r23, r9
1e4: 8a 09 sbc r24, r10
1e6: 9b 09 sbc r25, r11
1e8: 68 3e cpi r22, 0xE8 ; 232
1ea: 73 40 sbci r23, 0x03 ; 3
1ec: 81 05 cpc r24, r1
1ee: 91 05 cpc r25, r1
1f0: a8 f3 brcs .-22 ; 0x1dc
1f2: 21 e0 ldi r18, 0x01 ; 1
1f4: c2 1a sub r12, r18
1f6: d1 08 sbc r13, r1
1f8: e1 08 sbc r14, r1
1fa: f1 08 sbc r15, r1
1fc: 88 ee ldi r24, 0xE8 ; 232
1fe: 88 0e add r8, r24
200: 83 e0 ldi r24, 0x03 ; 3
202: 98 1e adc r9, r24
204: a1 1c adc r10, r1
206: b1 1c adc r11, r1
208: c1 14 cp r12, r1
20a: d1 04 cpc r13, r1
20c: e1 04 cpc r14, r1
20e: f1 04 cpc r15, r1
210: 29 f7 brne .-54 ; 0x1dc
212: ff 90 pop r15
214: ef 90 pop r14
216: df 90 pop r13
218: cf 90 pop r12
21a: bf 90 pop r11
21c: af 90 pop r10
21e: 9f 90 pop r9
220: 8f 90 pop r8
222: 08 95 ret
224: 1f 92 push r1
226: 0f 92 push r0
228: 0f b6 in r0, 0x3f ; 63
22a: 0f 92 push r0
22c: 11 24 eor r1, r1
22e: 2f 93 push r18
230: 3f 93 push r19
232: 8f 93 push r24
234: 9f 93 push r25
236: af 93 push r26
238: bf 93 push r27
23a: 80 91 01 01 lds r24, 0x0101 ; 0x800101
23e: 90 91 02 01 lds r25, 0x0102 ; 0x800102
242: a0 91 03 01 lds r26, 0x0103 ; 0x800103
246: b0 91 04 01 lds r27, 0x0104 ; 0x800104
24a: 30 91 00 01 lds r19, 0x0100 ; 0x800100
24e: 23 e0 ldi r18, 0x03 ; 3
250: 23 0f add r18, r19
252: 2d 37 cpi r18, 0x7D ; 125
254: 58 f5 brcc .+86 ; 0x2ac
256: 01 96 adiw r24, 0x01 ; 1
258: a1 1d adc r26, r1
25a: b1 1d adc r27, r1
25c: 20 93 00 01 sts 0x0100, r18 ; 0x800100
260: 80 93 01 01 sts 0x0101, r24 ; 0x800101
264: 90 93 02 01 sts 0x0102, r25 ; 0x800102
268: a0 93 03 01 sts 0x0103, r26 ; 0x800103
26c: b0 93 04 01 sts 0x0104, r27 ; 0x800104
270: 80 91 05 01 lds r24, 0x0105 ; 0x800105
274: 90 91 06 01 lds r25, 0x0106 ; 0x800106
278: a0 91 07 01 lds r26, 0x0107 ; 0x800107
27c: b0 91 08 01 lds r27, 0x0108 ; 0x800108
280: 01 96 adiw r24, 0x01 ; 1
282: a1 1d adc r26, r1
284: b1 1d adc r27, r1
286: 80 93 05 01 sts 0x0105, r24 ; 0x800105
28a: 90 93 06 01 sts 0x0106, r25 ; 0x800106
28e: a0 93 07 01 sts 0x0107, r26 ; 0x800107
292: b0 93 08 01 sts 0x0108, r27 ; 0x800108
296: bf 91 pop r27
298: af 91 pop r26
29a: 9f 91 pop r25
29c: 8f 91 pop r24
29e: 3f 91 pop r19
2a0: 2f 91 pop r18
2a2: 0f 90 pop r0
2a4: 0f be out 0x3f, r0 ; 63
2a6: 0f 90 pop r0
2a8: 1f 90 pop r1
2aa: 18 95 reti
2ac: 26 e8 ldi r18, 0x86 ; 134
2ae: 23 0f add r18, r19
2b0: 02 96 adiw r24, 0x02 ; 2
2b2: a1 1d adc r26, r1
2b4: b1 1d adc r27, r1
2b6: d2 cf rjmp .-92 ; 0x25c
2b8: 78 94 sei
2ba: 84 b5 in r24, 0x24 ; 36
2bc: 82 60 ori r24, 0x02 ; 2
2be: 84 bd out 0x24, r24 ; 36
2c0: 84 b5 in r24, 0x24 ; 36
2c2: 81 60 ori r24, 0x01 ; 1
2c4: 84 bd out 0x24, r24 ; 36
2c6: 85 b5 in r24, 0x25 ; 37
2c8: 82 60 ori r24, 0x02 ; 2
2ca: 85 bd out 0x25, r24 ; 37
2cc: 85 b5 in r24, 0x25 ; 37
2ce: 81 60 ori r24, 0x01 ; 1
2d0: 85 bd out 0x25, r24 ; 37
2d2: 80 91 6e 00 lds r24, 0x006E ; 0x80006e
2d6: 81 60 ori r24, 0x01 ; 1
2d8: 80 93 6e 00 sts 0x006E, r24 ; 0x80006e
2dc: 10 92 81 00 sts 0x0081, r1 ; 0x800081
2e0: 80 91 81 00 lds r24, 0x0081 ; 0x800081
2e4: 82 60 ori r24, 0x02 ; 2
2e6: 80 93 81 00 sts 0x0081, r24 ; 0x800081
2ea: 80 91 81 00 lds r24, 0x0081 ; 0x800081
2ee: 81 60 ori r24, 0x01 ; 1
2f0: 80 93 81 00 sts 0x0081, r24 ; 0x800081
2f4: 80 91 80 00 lds r24, 0x0080 ; 0x800080
2f8: 81 60 ori r24, 0x01 ; 1
2fa: 80 93 80 00 sts 0x0080, r24 ; 0x800080
2fe: 80 91 b1 00 lds r24, 0x00B1 ; 0x8000b1
302: 84 60 ori r24, 0x04 ; 4
304: 80 93 b1 00 sts 0x00B1, r24 ; 0x8000b1
308: 80 91 b0 00 lds r24, 0x00B0 ; 0x8000b0
30c: 81 60 ori r24, 0x01 ; 1
30e: 80 93 b0 00 sts 0x00B0, r24 ; 0x8000b0
312: 80 91 7a 00 lds r24, 0x007A ; 0x80007a
316: 84 60 ori r24, 0x04 ; 4
318: 80 93 7a 00 sts 0x007A, r24 ; 0x80007a
31c: 80 91 7a 00 lds r24, 0x007A ; 0x80007a
320: 82 60 ori r24, 0x02 ; 2
322: 80 93 7a 00 sts 0x007A, r24 ; 0x80007a
326: 80 91 7a 00 lds r24, 0x007A ; 0x80007a
32a: 81 60 ori r24, 0x01 ; 1
32c: 80 93 7a 00 sts 0x007A, r24 ; 0x80007a
330: 80 91 7a 00 lds r24, 0x007A ; 0x80007a
334: 80 68 ori r24, 0x80 ; 128
336: 80 93 7a 00 sts 0x007A, r24 ; 0x80007a
33a: 10 92 c1 00 sts 0x00C1, r1 ; 0x8000c1
33e: ed e9 ldi r30, 0x9D ; 157
340: f0 e0 ldi r31, 0x00 ; 0
342: 24 91 lpm r18, Z
344: e9 e8 ldi r30, 0x89 ; 137
346: f0 e0 ldi r31, 0x00 ; 0
348: 84 91 lpm r24, Z
34a: 88 23 and r24, r24
34c: 99 f0 breq .+38 ; 0x374
34e: 90 e0 ldi r25, 0x00 ; 0
350: 88 0f add r24, r24
352: 99 1f adc r25, r25
354: fc 01 movw r30, r24
356: e8 59 subi r30, 0x98 ; 152
358: ff 4f sbci r31, 0xFF ; 255
35a: a5 91 lpm r26, Z+
35c: b4 91 lpm r27, Z
35e: fc 01 movw r30, r24
360: ee 58 subi r30, 0x8E ; 142
362: ff 4f sbci r31, 0xFF ; 255
364: 85 91 lpm r24, Z+
366: 94 91 lpm r25, Z
368: 8f b7 in r24, 0x3f ; 63
36a: f8 94 cli
36c: ec 91 ld r30, X
36e: e2 2b or r30, r18
370: ec 93 st X, r30
372: 8f bf out 0x3f, r24 ; 63
374: c0 e0 ldi r28, 0x00 ; 0
376: d0 e0 ldi r29, 0x00 ; 0
378: 81 e0 ldi r24, 0x01 ; 1
37a: 0e 94 70 00 call 0xe0 ; 0xe0
37e: 0e 94 dd 00 call 0x1ba ; 0x1ba
382: 80 e0 ldi r24, 0x00 ; 0
384: 0e 94 70 00 call 0xe0 ; 0xe0
388: 0e 94 dd 00 call 0x1ba ; 0x1ba
38c: 20 97 sbiw r28, 0x00 ; 0
38e: a1 f3 breq .-24 ; 0x378
390: 0e 94 00 00 call 0 ; 0x0
394: f1 cf rjmp .-30 ; 0x378
396: f8 94 cli
398: ff cf rjmp .-2 ; 0x398
I only found the numbers 200 in line 1d2, I think this is the duration of the pauses between commands for LED.
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