Uploading troubles to 1284p

"@crossroads which bootloader are u currently using?"

This one, which I think is what sets up with the maniacbug cores.

optiboot_atmega1284p.hex (1.47 KB)

Thanx :slight_smile:
Tried it out... Still getting not in sync errors... :frowning:

It didn't arrive, lol.

Well, you didn't say whose weekend, still have a small chance at getting it before My weekend - course, its going on 4:30pm, not much time left for UPS to make afternoon dropoffs ...

Chip arrived, got minimal board going. Details here:

Programming the bootloader:

Installing a sketch using the bootloader:

Good work nick... :slight_smile: Seems you to have got it working properly.. :slight_smile: Any troubles uploading til now?
I seem to have done all of these stuff mentioned earlier but still my problem still remains... :frowning: Anyways let me try doing it ditto as u mentioned in your tutorial...
@ nick
Tried uploading larger sketches? and Is the bootloader uploaded by your https://github.com/nickgammon/arduino_sketches/tree/master/Atmega_Board_Programmer same as the one provided by maniacbug?

Sorry Wrong link edited... :slight_smile:

Wow, that chip looks big in the first pic! Result of the camera angle I guess.

@nick
Freaking Hell!!! Ur bootloader hex file worked XD
did 10 uploads no troubles watsover.... :smiley: U are real life saver... :smiley: U solved the thing which was driving me nuts...
Did u change the bootloader?

One more thing... :slight_smile:

Now we'll install the bootloader upload sketch onto the Uno and run it (set the serial monitor to 115200 baud).

http://gammon.com.au/Arduino/Atmega_Board_Detector.zip

Plz edit the given link with the bootloader one in your tutorial page... :slight_smile:

000:
@ nick
Tried uploading larger sketches?

Not yet.

and Is the bootloader uploaded by your arduino_sketches/Atmega_Board_Programmer at master ยท nickgammon/arduino_sketches ยท GitHub same as the one provided by maniacbug?

It is the file optiboot_atmega1284p.hex from maniacbug's GitHub page. Slightly modified to change some of the consecutive 0xFF bytes to be 0x00 because of the problem with uploading a lot of consecutive 0xFFs to the Uno using the standard Optiboot (known bug there).

000:
Plz edit the given link with the bootloader one in your tutorial page... :slight_smile:

Fixed thx.

Freaking Hell!!! Ur bootloader hex file worked

Strange. I expected more teething problems. :wink:

Well, glad it worked.

000:
Did u change the bootloader?

Not apart from the change made so it would actually upload to the programming Uno.

@Nick Was comparing the chip fuse with maniacbugs (which I did earlier) and yours

Maniacbug

Atmega fuse calculator.
Written by Nick Gammon.
Entered programming mode OK.
Signature = 0x1E 0x97 0x05 
Processor = ATmega1284P
Flash memory size = 262144
LFuse = 0xFF 
HFuse = 0xDE 
EFuse = 0xFD 
Lock byte = 0xCF 
OCD Enable.............................. [ ]
JTAG Enable............................. [ ]
Enable Serial (ICSP) Programming........ [X]
Watchdog Timer Always On................ [ ]
Preserve EEPROM through chip erase...... [ ]
Boot into bootloader.................... [X]
Divide clock by 8....................... [ ]
Clock output............................ [ ]
Bootloader size: 1024 bytes.
Start-up time: SUT0: [X] ย SUT1: [X] (see datasheet)
Clock source: low-power crystal.
Brownout detection at: 2.7V.

Nicks Bootloader

Atmega fuse calculator.
Written by Nick Gammon.
Entered programming mode OK.
Signature = 0x1E 0x97 0x05 
Processor = ATmega1284P
Flash memory size = 131072
LFuse = 0xFF 
HFuse = 0xDE 
EFuse = 0xFD 
Lock byte = 0xEF 
OCD Enable.............................. [ ]
JTAG Enable............................. [ ]
Enable Serial (ICSP) Programming........ [X]
Watchdog Timer Always On................ [ ]
Preserve EEPROM through chip erase...... [ ]
Boot into bootloader.................... [X]
Divide clock by 8....................... [ ]
Clock output............................ [ ]
Bootloader size: 1024 bytes.
Start-up time: SUT0: [X] ย SUT1: [X] (see datasheet)
Clock source: low-power crystal.
Brownout detection at: 2.7V.

Lock byte and Flash memory sizes are different..

Board detector output files Comparison

With Maniac bugs bootloader

Atmega chip detector.
Entered programming mode OK.
Signature = 1E 97 05 
Processor = ATmega1284P
Flash memory size = 262144
LFuse = FF 
HFuse = DE 
EFuse = FD 
Lock byte = CF 
Bootloader in use: Yes
EEPROM preserved through erase: No
Watchdog timer always on: No
Bootloader is 1024 bytes starting at 3FC00

Bootloader:

3FC00: 0F 92 CD B7 DE B7 11 24 84 B7 14 BE 81 FF F1 D0 
3FC10: 85 E0 80 93 81 00 82 E0 80 93 C0 00 88 E1 80 93 
3FC20: C1 00 86 E0 80 93 C2 00 80 E1 80 93 C4 00 8E E0 
3FC30: CA D0 20 9A 26 E0 80 E3 9C EF 31 E0 90 93 85 00 
3FC40: 80 93 84 00 36 BB B0 9B FE CF 18 9A A8 95 21 50 
3FC50: A9 F7 00 E0 10 E0 EE 24 E3 94 E1 E1 DE 2E F3 E0 
3FC60: FF 2E A5 D0 81 34 71 F4 A2 D0 89 83 B2 D0 89 81 
3FC70: 82 38 09 F4 8B C0 81 38 11 F4 84 E0 01 C0 83 E0 
3FC80: 8F D0 8B C0 82 34 11 F4 84 E1 03 C0 85 34 19 F4 
3FC90: 85 E0 A7 D0 82 C0 85 35 91 F4 89 D0 A8 2E BB 24 
3FCA0: 86 D0 08 2F 10 E0 10 2F 00 27 0A 29 1B 29 81 2F 
3FCB0: 88 1F 88 27 88 1F 8B BF 00 0F 11 1F 6D C0 86 35 
3FCC0: 21 F4 84 E0 8E D0 80 E0 DB CF 84 36 09 F0 40 C0 
3FCD0: 6E D0 6D D0 C8 2E 6B D0 80 EE 00 30 18 07 18 F4 
3FCE0: F8 01 F7 BE E8 95 A1 2C 51 E0 B5 2E 60 D0 F5 01 
3FCF0: 81 93 5F 01 CE 16 D1 F7 F0 EE 00 30 1F 07 18 F0 
3FD00: F8 01 F7 BE E8 95 65 D0 07 B6 00 FC FD CF F8 01 
3FD10: A0 E0 B1 E0 2C 91 30 E0 11 96 8C 91 11 97 90 E0 
3FD20: 98 2F 88 27 82 2B 93 2B 12 96 0C 01 E7 BE E8 95 
3FD30: 11 24 32 96 82 E0 A0 30 B8 07 61 F7 85 E0 F8 01 
3FD40: 87 BF E8 95 07 B6 00 FC FD CF D7 BE E8 95 25 C0 
3FD50: 84 37 A9 F4 2C D0 2B D0 B8 2E 29 D0 3A D0 CB 2C 
3FD60: 48 01 F4 01 86 91 1C D0 08 94 81 1C 91 1C CA 94 
3FD70: C1 F7 0F 5F 1F 4F BA 94 0B 0D 11 1D 0E C0 85 37 
3FD80: 39 F4 27 D0 8E E1 0C D0 87 E9 0A D0 85 E0 78 CF 
3FD90: 81 35 11 F4 88 E0 17 D0 1C D0 80 E1 01 D0 61 CF 
3FDA0: 90 91 C0 00 95 FF FC CF 80 93 C6 00 08 95 80 91 
3FDB0: C0 00 87 FF FC CF 80 91 C0 00 84 FD 01 C0 A8 95 
3FDC0: 80 91 C6 00 08 95 E0 E6 F0 E0 98 E1 90 83 80 83 
3FDD0: 08 95 ED DF 80 32 19 F0 88 E0 F5 DF FF CF 84 E1 
3FDE0: DF CF CF 93 C8 2F E3 DF C1 50 E9 F7 F2 DF CF 91 
3FDF0: 08 95 80 E0 E8 DF EE 27 FF 27 09 94 FF FF FF FF 
3FE00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FE90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FEA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FEB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FEC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FED0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FEE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FEF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FF90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FFA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FFB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FFC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FFD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FFE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
3FFF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 

MD5 sum of bootloader = 71 DD C2 84 64 C4 73 27 D2 33 01 1E FA E1 24 4B 

First 256 bytes of program memory:

0: 0C 94 87 00 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 
10: 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 
20: 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 
30: 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 
40: 0C 94 B2 00 0C 94 B2 00 0C 94 7B 12 0C 94 B2 00 
50: 0C 94 66 14 0C 94 FC 14 0C 94 B2 00 0C 94 B2 00 
60: 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 
70: 0C 94 9F 14 0C 94 49 15 0C 94 B2 00 0C 94 B2 00 
80: 0C 94 B2 00 0C 94 B2 00 0C 94 B2 00 00 00 21 00 
90: 24 00 27 00 2A 00 00 00 22 00 25 00 28 00 2B 00 
A0: 00 00 20 00 23 00 26 00 29 00 02 02 02 02 02 02 
B0: 02 02 04 04 04 04 04 04 04 04 03 03 03 03 03 03 
C0: 03 03 01 01 01 01 01 01 01 01 01 02 04 08 10 20 
D0: 40 80 01 02 04 08 10 20 40 80 01 02 04 08 10 20 
E0: 40 80 01 02 04 08 10 20 40 80 00 00 00 01 02 00 
F0: 08 09 00 00 00 00 04 03 07 06 00 00 00 00 00 00

continued onto next post (Char limit) :slight_smile:

And Nicks bootloader (Working..)

Atmega chip detector.
Entered programming mode OK.
Signature = 1E 97 05 
Processor = ATmega1284P
Flash memory size = 131072
LFuse = FF 
HFuse = DE 
EFuse = FD 
Lock byte = EF 
Bootloader in use: Yes
EEPROM preserved through erase: No
Watchdog timer always on: No
Bootloader is 1024 bytes starting at 1FC00

Bootloader:

1FC00: 0F 92 CD B7 DE B7 11 24 84 B7 14 BE 81 FF F1 D0 
1FC10: 85 E0 80 93 81 00 82 E0 80 93 C0 00 88 E1 80 93 
1FC20: C1 00 86 E0 80 93 C2 00 80 E1 80 93 C4 00 8E E0 
1FC30: CA D0 20 9A 26 E0 80 E3 9C EF 31 E0 90 93 85 00 
1FC40: 80 93 84 00 36 BB B0 9B FE CF 18 9A A8 95 21 50 
1FC50: A9 F7 00 E0 10 E0 EE 24 E3 94 E1 E1 DE 2E F3 E0 
1FC60: FF 2E A5 D0 81 34 71 F4 A2 D0 89 83 B2 D0 89 81 
1FC70: 82 38 09 F4 8B C0 81 38 11 F4 84 E0 01 C0 83 E0 
1FC80: 8F D0 8B C0 82 34 11 F4 84 E1 03 C0 85 34 19 F4 
1FC90: 85 E0 A7 D0 82 C0 85 35 91 F4 89 D0 A8 2E BB 24 
1FCA0: 86 D0 08 2F 10 E0 10 2F 00 27 0A 29 1B 29 81 2F 
1FCB0: 88 1F 88 27 88 1F 8B BF 00 0F 11 1F 6D C0 86 35 
1FCC0: 21 F4 84 E0 8E D0 80 E0 DB CF 84 36 09 F0 40 C0 
1FCD0: 6E D0 6D D0 C8 2E 6B D0 80 EE 00 30 18 07 18 F4 
1FCE0: F8 01 F7 BE E8 95 A1 2C 51 E0 B5 2E 60 D0 F5 01 
1FCF0: 81 93 5F 01 CE 16 D1 F7 F0 EE 00 30 1F 07 18 F0 
1FD00: F8 01 F7 BE E8 95 65 D0 07 B6 00 FC FD CF F8 01 
1FD10: A0 E0 B1 E0 2C 91 30 E0 11 96 8C 91 11 97 90 E0 
1FD20: 98 2F 88 27 82 2B 93 2B 12 96 0C 01 E7 BE E8 95 
1FD30: 11 24 32 96 82 E0 A0 30 B8 07 61 F7 85 E0 F8 01 
1FD40: 87 BF E8 95 07 B6 00 FC FD CF D7 BE E8 95 25 C0 
1FD50: 84 37 A9 F4 2C D0 2B D0 B8 2E 29 D0 3A D0 CB 2C 
1FD60: 48 01 F4 01 86 91 1C D0 08 94 81 1C 91 1C CA 94 
1FD70: C1 F7 0F 5F 1F 4F BA 94 0B 0D 11 1D 0E C0 85 37 
1FD80: 39 F4 27 D0 8E E1 0C D0 87 E9 0A D0 85 E0 78 CF 
1FD90: 81 35 11 F4 88 E0 17 D0 1C D0 80 E1 01 D0 61 CF 
1FDA0: 90 91 C0 00 95 FF FC CF 80 93 C6 00 08 95 80 91 
1FDB0: C0 00 87 FF FC CF 80 91 C0 00 84 FD 01 C0 A8 95 
1FDC0: 80 91 C6 00 08 95 E0 E6 F0 E0 98 E1 90 83 80 83 
1FDD0: 08 95 ED DF 80 32 19 F0 88 E0 F5 DF FF CF 84 E1 
1FDE0: DF CF CF 93 C8 2F E3 DF C1 50 E9 F7 F2 DF CF 91 
1FDF0: 08 95 80 E0 E8 DF EE 27 FF 27 09 94 FF FF FF FF 
1FE00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE20: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE60: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FE90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FEA0: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FEB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FEC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FED0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FEE0: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FEF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF20: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF30: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF60: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FF90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FFA0: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FFB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FFC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FFD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FFE0: 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
1FFF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 

MD5 sum of bootloader = 77 2F 81 F1 7F 1E 46 93 97 B4 54 23 4C 44 72 68 

First 256 bytes of program memory:

0: 0C 94 85 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
10: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
20: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
30: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
40: 0C 94 A5 00 0C 94 A5 00 0C 94 C1 00 0C 94 A5 00 
50: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
60: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
70: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 
80: 0C 94 A5 00 0C 94 A5 00 0C 94 A5 00 00 00 21 00 
90: 24 00 27 00 2A 00 00 00 22 00 25 00 28 00 2B 00 
A0: 00 00 20 00 23 00 26 00 29 00 02 02 02 02 02 02 
B0: 02 02 04 04 04 04 04 04 04 04 03 03 03 03 03 03 
C0: 03 03 01 01 01 01 01 01 01 01 01 02 04 08 10 20 
D0: 40 80 01 02 04 08 10 20 40 80 01 02 04 08 10 20 
E0: 40 80 01 02 04 08 10 20 40 80 00 00 00 01 02 00 
F0: 08 09 00 00 00 00 04 03 07 06 00 00 00 00 00 00

It is the file optiboot_atmega1284p.hex from maniacbug's GitHub page. Slightly modified to change some of the consecutive 0xFF bytes to be 0x00 because of the problem with uploading a lot of consecutive 0xFFs to the Uno using the standard Optiboot (known bug there).

Maybe this was the problem?? or Fuse settings difference was also there in Lock byte and Flash memory sizes :slight_smile:

000:
Lock byte and Flash memory sizes are different..

I had a bug in my sketches (now corrected) where it thought the 1284 had 256 Kb of memory. Of course, it has 128 Kb of memory. So that is just a bug on my part.

The lock bits aren't that important (well, they are important) but the difference shouldn't affect uploading. I just turned on the bit which lets the sketch read the memory of the bootloader.

Come to think of it, I found a rogue line in maniacbug's bootloader, which I deleted:

:020000000504F5ย  <----- delete this line
:020000021000EC
:10FC00000F92CDB7DEB7112484B714BE81FFF1D0B7
:10FC100085E08093810082E08093C00088E180933A
:10FC2000C10086E08093C20080E18093C4008EE032
:10FC3000CAD0209A26E080E39CEF31E090938500C3
:10FC40008093840036BBB09BFECF189AA8952150B4
:10FC5000A9F700E010E0EE24E394E1E1DE2EF3E00A
:10FC6000FF2EA5D0813471F4A2D08983B2D08981CE
:10FC7000823809F48BC0813811F484E001C083E03C
:10FC80008FD08BC0823411F484E103C0853419F421
:10FC900085E0A7D082C0853591F489D0A82EBB24F9
:10FCA00086D0082F10E0102F00270A291B29812F4A
:10FCB000881F8827881F8BBF000F111F6DC08635D6
:10FCC00021F484E08ED080E0DBCF843609F040C0A0
:10FCD0006ED06DD0C82E6BD080EE0030180718F4AF
:10FCE000F801F7BEE895A12C51E0B52E60D0F501E2
:10FCF00081935F01CE16D1F7F0EE00301F0718F0A8
:10FD0000F801F7BEE89565D007B600FCFDCFF80115
:10FD1000A0E0B1E02C9130E011968C91119790E029
:10FD2000982F8827822B932B12960C01E7BEE8951B
:10FD30001124329682E0A030B80761F785E0F8011F
:10FD400087BFE89507B600FCFDCFD7BEE89525C074
:10FD50008437A9F42CD02BD0B82E29D03AD0CB2C74
:10FD60004801F40186911CD00894811C911CCA940E
:10FD7000C1F70F5F1F4FBA940B0D111D0EC08537D1
:10FD800039F427D08EE10CD087E90AD085E078CF0E
:10FD9000813511F488E017D01CD080E101D061CF0B
:10FDA0009091C00095FFFCCF8093C600089580918C
:10FDB000C00087FFFCCF8091C00084FD01C0A895E2
:10FDC0008091C6000895E0E6F0E098E1908380839A
:10FDD0000895EDDF803219F088E0F5DFFFCF84E190
:10FDE000DFCFCF93C82FE3DFC150E9F7F2DFCF9128
:0CFDF000089580E0E8DFEE27FF2709946B
:040000031000FC00ED
:00000001FF

I couldn't see the point of that, so that was the only real change I made.

Oh yes, and the changes to the 0xFF I mentioned, are really an artifact of my conversion process. They weren't in the original bootloader file anyway.

@ Nick that could have been the problem I guess... Anyways mine is working nicely now... :smiley: Thanks a lot again...
@ All I would suggest Nick hex file for bootloaders on ATmega1284p :slight_smile:

Oh... God!!! Why me??? =( The issue is back... :frowning:

avrdude: stk500_getsync(): not in sync: resp=0x00

and I am back to square one... :frowning:
It was fun while it worked... :frowning:

We seem to have more than one issue here. On the one hand, the bootloader uploader worked.

On the other, your particular installations seems a bit flaky.

To save me re-reading 4 or 5 pages, can you just remind me of your hardware setup? Or take a photo, preferably?

Idiot... I am an idiot... found the problem I forgot to change the boards to Atmega1284 in IDE last time I uploaded. thats why this time I got sync errors... I was toggling between Duemolanove and Atmega1284 so last time I forgot to change it back... SO new bootloader has actually solved the problem... :smiley: I am so relieved now!!! :smiley:
Thanx again for Nick and Crossroads for your helps... :slight_smile: