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):

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>

 

No files currently attached

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -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 -email is unavailable-

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