Yahoo Groups archive
Thread
2013-11-06 by Chuck Hackett
I am attempting to use the avrlib eeprom routines on an ATMega1284p I am using the WinAVR-20100110 tool chain When I link I get => undefined reference to `__eerd_block_m1284p' Do I need to specify an additional library to link to? Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck
2013-11-06 by tom@outsidetrains.com
You're using studio? I think all you need to do is #include <avr/eeprom.h>
2013-11-06 by dkinzer@gmail.com
#include <stdint.h>
#include <avr/eeprom.h>
uint8_t buf[20];
int
main(void)
{
eeprom_read_block(buf, (const uint8_t *)0, sizeof(buf));
}
2013-11-06 by Chuck Hackett
Hi,
I compiler your example and I got: undefined reference to `__eerd_block_m128'
-------------- Clean: Debug in EEPROMtest (compiler: GNU AVR GCC Compiler)---------------
Cleaned "EEPROMtest - Debug"
-------------- Build: Debug in EEPROMtest (compiler: GNU AVR GCC Compiler)---------------
avr-gcc.exe -mmcu=atmega128 -Wall -DF_CPU=16000000UL -g -std=c99 -IC:\WinAVR-20100110\avr\include -c main.c -o obj\Debug\main.o
avr-g++.exe -LC:\WinAVR-20071221\avr\lib -LC:\WinAVR-20100110\avr\lib -o bin\Debug\EEPROMtest.elf obj\Debug\main.o -mmcu=atmega128 -Wl,-Map=bin\Debug\EEPROMtest.map,--cref
obj\Debug\main.o: In function `main':
C:\Temp\EEPROM test\EEPROMtest/main.c:9: undefined reference to `__eerd_block_m128'
Process terminated with status 1 (0 minutes, 1 seconds)
1 errors, 0 warnings (0 minutes, 1 seconds)
I am using the Code::Blocks IDE. I noticed that it has included "-LC:\WinAVR-20071221\avr\lib" in the linker command even though this folder does not exist (C:\WinAVR-20100110\avr\lib does exist). I have searched within Code::Blocks to figure out why this is there but to no avail. Since the folder does not exist I assume that it is not the cause of the problem.
I have included the map at the bottom of this email. Maybe you could compare this to your map (although you did not mention what processor you targeted your compile to).
Thanks in advance for any help you might be able to lend ...
Cheers,
Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck
> -----Original Message-----
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com]
> On Behalf Of dkinzer@gmail.com
> Sent: Wednesday, November 06, 2013 2:44 PM
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] RE: Using ATMega1284p EEPROM
>
>
>
> Can you post example code that produces the error? The following code
> compiles and links fine for me using WinAVR20100110.
>
> #include <stdint.h>
> #include <avr/eeprom.h>
>
> uint8_t buf[20];
>
> int
> main(void)
> {
> eeprom_read_block(buf, (const uint8_t *)0, sizeof(buf));
> }
>
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c:/winavr-20100110/bin/../lib/gcc/avr/4.3.3/../../../../avr/lib/avr51/crtm128.o2013-11-06 by Chuck Hackett
dkinzer@gmail.com: I managed to get rid of the extra library search (deep down in a Code::Blocks xml default config file) but I still get the same error ... Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck
2013-11-06 by Chuck Hackett
I also seem to remember (while google searching this problem) someone saying that there was a later version of WinAVR-20100110 even though it has the same folder name. The date on my C:\WinAVR-20100110\lib\gcc\avr\4.3.3\avr51\libgcc.a file is 1/6/2010. Should I re-download WinAVR-20100110? Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck
2013-11-06 by dkinzer@gmail.com
See if the libc.a in the avr51 directory contains __eerd_block_m1284p:
avr-nm avrlibc.a | fgrep __eerd_block_m1284p
If not, that's your problem.
Don Kinzer
2013-11-06 by Chuck Hackett
Don, I have confirmed that __eerd_block_m1284p is contained in c:\WinAVR-20101001\avr\lib\avr51\libc.a Since the linker command included “-LC:\WinAVR-20100110\avr\lib” I am at a loss … Now what ? Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 <http://www.whitetrout.net/Chuck> http://www.whitetrout.net/Chuck
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of dkinzer@gmail.com Sent: Wednesday, November 06, 2013 4:02 PM To: AVR-Chat@yahoogroups.com Subject: RE: RE: [AVR-Chat] RE: Using ATMega1284p EEPROM See if the libc.a in the avr51 directory contains __eerd_block_m1284p: avr-nm avrlibc.a | fgrep __eerd_block_m1284p If not, that's your problem. Don Kinzer ---In AVR-Chat@yahoogroups.com, <egroupscdh@...> wrote: I also seem to remember (while google searching this problem) someone saying that there was a later version of WinAVR-20100110 even though it has the same folder name. The date on my C:\WinAVR-20100110\lib\gcc\avr\4.3.3\avr51\libgcc.a file is 1/6/2010. Should I re-download WinAVR-20100110? Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck
2013-11-07 by Chuck Hackett
I found the problem by comparing AVR Studio build steps to the build steps used by Code::Blocks. Turns out that the ““-LC:\WinAVR-20100110\avr\lib” is excess and somehow interferes with gcc’s processor independent link sequence. I removed it and all is well. Problem solved … Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Chuck Hackett Sent: Wednesday, November 06, 2013 5:31 PM To: AVR-Chat@yahoogroups.com Subject: RE: RE: [AVR-Chat] RE: Using ATMega1284p EEPROM Don, I have confirmed that __eerd_block_m1284p is contained in c:\WinAVR-20101001\avr\lib\avr51\libc.a Since the linker command included “-LC:\WinAVR-20100110\avr\lib” I am at a loss … Now what ? Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 <http://www.whitetrout.net/Chuck> http://www.whitetrout.net/Chuck From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of dkinzer@gmail.com Sent: Wednesday, November 06, 2013 4:02 PM To: AVR-Chat@yahoogroups.com Subject: RE: RE: [AVR-Chat] RE: Using ATMega1284p EEPROM See if the libc.a in the avr51 directory contains __eerd_block_m1284p: avr-nm avrlibc.a | fgrep __eerd_block_m1284p If not, that's your problem. Don Kinzer ---In AVR-Chat@yahoogroups.com, <egroupscdh@...> wrote: I also seem to remember (while google searching this problem) someone saying that there was a later version of WinAVR-20100110 even though it has the same folder name. The date on my C:\WinAVR-20100110\lib\gcc\avr\4.3.3\avr51\libgcc.a file is 1/6/2010. Should I re-download WinAVR-20100110? Cheers, Chuck Hackett "Good judgment comes from experience, experience comes from bad judgment" 7.5" gauge Union Pacific Northern (4-8-4) 844 http://www.whitetrout.net/Chuck