bugAVR Downloader/UploaDEr - Bugs: bug #53008, avrdude fails to read more than...

 
 

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bug #53008: avrdude fails to read more than 440 bytes of EEPROM

Submitted by:  The Lightning Stalker <lightningstalker>
Submitted on:  Mon 29 Jan 2018 11:33:56 PM UTC  
 
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  Need Info Privacy:  Public
Assigned to:  None Originator Name:  The Lightning Stalker
Open/Closed:  Open Release:  6.3
Programmer hardware:  USBtinyISP Device type:  m8

Thu 01 Feb 2018 02:15:52 AM UTC, comment #4: 

Well I'm not sure why but rebooting seems to have fixed it. idk computers are strange

The Lightning Stalker <lightningstalker>
Tue 30 Jan 2018 07:37:59 PM UTC, comment #3: 

Well, I got occasional retries on reading the EEPROM (heavily
depending on the clock value), sometimes the firmware appears
to fail, but if it passes, I get full 512 bytes of EEPROM from
an ATmega16 (don't have an ATmega8 handy):

./avrdude -C avrdude.conf -p m16  -c usbtiny -U ee:r:foo.hex:i

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x1e9403 (probably m16)
avrdude: reading eeprom memory:

Reading | #                                                  | 2% 0.40savrdude: 1 retries during read
Reading | #####                                              | 9% 1.81s
avrdude: error: usbtiny_receive: Unknown error (expected 128, got -1)
Reading | #####                                              | 10% 2.58savrdude: 10 retries during SPI command
Reading | ##########################                         | 52% 4.19savrdude: 3 retries during SPI command
Reading | ################################################## | 100% 5.85s

avrdude: writing output file "foo.hex"

avrdude: safemode: Fuses OK (E:FF, H:99, L:E4)

avrdude done.  Thank you.

The target is sitting in an STK500.  If I use the STK500
itself to read the EEPROM, everything is fine (and fast).

I also tried with the junk fill option of malloc enabled
(this is FreeBSD), to imcrease the probability of hitting
a segfault, but it passes just the same as above.

Can you analyze the segfault with a debugger, to see where
it crashes for you?

Joerg Wunsch <joerg_wunsch>
Project Administrator
Tue 30 Jan 2018 01:37:17 AM UTC, comment #2: 

I thought it was reading large amounts of memory but turns out reading EEPROM is just slower than flash. The name of this bug should really be "avrdude cannot read more than 440 bytes of EEPROM".

The Lightning Stalker <lightningstalker>
Tue 30 Jan 2018 01:34:40 AM UTC, comment #1: 

By changing line 6448 in avrdude.conf I can read up to 440 bytes of EEPROM. Attempting to read 441 or greater results in the segfault. Luckily I only need the first 89B but anyone who needs >440B is SOL.

The Lightning Stalker <lightningstalker>
Mon 29 Jan 2018 11:33:56 PM UTC, original submission:  

avrdude is unable to read the EEPROM from this device. Oddly enough writing and verifying seem to work. It seems more likely to be a problem with avrdude than USBtinyISP because otherwise how would it be able to verify?

Regardless of ihex or any other format it will read several kB of data then segfault at 85%.

$ avrdude -v -pm8 -cusbtiny -Ueeprom:r:eep:i

avrdude: Version 6.3
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "/etc/avrdude.conf"
         User configuration file is "/home/robert/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : usb
         Using Programmer              : usbtiny
         Setting bit clk period        : 1.0
avrdude: usbdev_open(): Found USBtinyISP, bus:device: 002:032
         AVR Part                      : ATmega8
         Chip Erase delay              : 10000 us
         PAGEL                         : PD7
         BS2                           : PC2
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                  Block Poll               Page                       Polled
           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom         4    20   128    0 no        512    4      0  9000  9000 0xff 0xff
           flash         33    10    64    0 yes      8192   64    128  4500  4500 0xff 0x00
           lfuse          0     0     0    0 no          1    0      0  2000  2000 0x00 0x00
           hfuse          0     0     0    0 no          1    0      0  2000  2000 0x00 0x00
           lock           0     0     0    0 no          1    0      0  2000  2000 0x00 0x00
           calibration    0     0     0    0 no          4    0      0     0     0 0x00 0x00
           signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

         Programmer Type : USBtiny
         Description     : USBtiny simple USB programmer, http://www.ladyada.net/make/usbtinyisp/
avrdude: programmer operation not supported

avrdude: Setting SCK period to 1 usec
avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e9307 (probably m8)
avrdude: safemode: hfuse reads as CC
avrdude: reading eeprom memory:

Reading | ###########################################        | 85% 5.23sSegmentation fault

The Lightning Stalker <lightningstalker>

 

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  • -email is unavailable- added by joerg_wunsch (Updated the item)
  • -email is unavailable- added by lightningstalker (Submitted the item)
  • -email is unavailable- added by lightningstalker
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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-01-30 joerg_wunsch StatusNone => Need Info
    2018-01-30 joerg_wunsch Summaryavrdude attempts to read large amounts of nonexistent EEPROM => avrdude fails to read more than 440 bytes of EEPROM
    2018-01-29 lightningstalker Carbon-Copy- => Added lgtngstk@gmail.com

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