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| 03:01.25 | Laurenceb | hi |
| 03:02.03 | Laurenceb | I'm trying to get codesourcery working |
| 03:03.11 | Laurenceb | e/bin/../lib/gcc/arm-none-eabi/4.3.2/../../../../arm-none-eabi/lib/libc.a(lib_a-abort.o): In function `abort': |
| 03:03.11 | Laurenceb | abort.c:(.text+0xc): undefined reference to `_exit' |
| 03:03.26 | Laurenceb | I'm trying to compile a hello world app |
| 03:14.08 | agaffney | Laurenceb: you're not linking to something you should be |
| 03:14.20 | agaffney | if I had to guess, I'd say libc |
| 03:14.46 | Laurenceb | hmm think I've got it |
| 03:15.02 | Laurenceb | <PROTECTED> |
| 03:15.13 | Laurenceb | but I dont understand fully |
| 03:15.15 | ds2 | try asking Code Sourcery since it is their product |
| 03:15.28 | agaffney | yes, that too :P |
| 03:15.33 | Laurenceb | generic-vfp-hosted.ld, what is that? |
| 03:16.14 | Laurenceb | and I now have an elf file, how do I get from that to something I can flash an arm7 with? |
| 03:16.15 | agaffney | what is -T? |
| 03:16.30 | agaffney | I don't see it in the gcc manpage |
| 03:16.58 | Laurenceb | it sets the linker script |
| 03:16.59 | ZeZu | i think its meant for ld rather than gcc |
| 03:17.18 | ZeZu | so maybe -Wl,-T or i forget ? |
| 03:17.58 | Laurenceb | whats the process in creating a hex? file |
| 03:18.06 | Laurenceb | i.e. in getting a flash image |
| 03:18.12 | agaffney | hmm, yes, -T specifies a linker script |
| 03:18.20 | agaffney | odd that -Wl, wasn't needed |
| 03:18.32 | agaffney | or does gcc just blindly pass any options it doesn't understand to ld? |
| 03:20.08 | ZeZu | pretty sure it doesn't |
| 03:23.19 | Laurenceb | so, if I'm going to get code running on my arm7, what are the next steps? |
| 03:23.42 | Laurenceb | <PROTECTED> |
| 03:29.20 | Laurenceb | or can you flash with an elf? |
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| 05:27.45 | ds2 | juggles a bunch of hot soldering arounds as if they were mere bowling pins |
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| 07:10.28 | Mirell | *blink...blink*.. |
| 07:10.32 | Mirell | I think my brain died. |
| 07:12.06 | Mirell | "Debian is tired of glibc, so they're switching to elibc, which is fork of glibc, because Ulrech Drepper is...not kindred to embedded patches, oh but to contribute to eglibc, you must assign copyright to the FSF...so...it's an FSF project, so then the FSF forked it's own project..." |
| 07:12.12 | Mirell | dies |
| 07:20.00 | ds2 | heheh |
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| 07:27.41 | ds2 | the real answer might be that Linux needs a decent libc not the bloated crap that is known as glibc |
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| 07:48.52 | mnemoc | is drepper "kindered" with anyone? |
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| 08:25.42 | methril|work | yo |
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| 14:17.22 | chouimat|work | morning |
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| 14:50.46 | Laurenceb | hi, I'm trying to run code on an lpc2148 |
| 14:51.06 | Laurenceb | I seem to have codesourcery producing elf files |
| 14:51.13 | Laurenceb | what do I need to do next? |
| 14:54.22 | Laurenceb | do I need a hex file? |
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| 14:59.50 | Madsy | Laurenceb: I assume your platform doesn't have an operative system since you ask that question. |
| 15:00.05 | Madsy | What kind of toolchain do you use? |
| 15:00.16 | Laurenceb | codesourcery |
| 15:00.36 | Madsy | Ah, ARM :-) |
| 15:00.36 | Laurenceb | yeah I'm just trying to stick a basic hello world app on |
| 15:00.47 | Laurenceb | sorry yeah I didnt say |
| 15:00.53 | Laurenceb | arm7 - lpc2148 |
| 15:01.15 | Madsy | If you don't even have a bootloader working which loads ELFs, you need to slice off the ELF header. |
| 15:01.27 | Madsy | See if your toolchain has a tool named objcopy or similar. |
| 15:01.34 | Laurenceb | ok |
| 15:01.43 | Laurenceb | yeah I dont understand what an elf is :P |
| 15:01.59 | Madsy | It is a binary exectuable format. |
| 15:02.12 | Laurenceb | yeah, so hex is similar but more basic? |
| 15:02.20 | Laurenceb | as its just raw data to run |
| 15:02.32 | Madsy | Windows has PE (Portable Executable). Linux and BSD uses ELF. Prior ELF, Linux used a.out |
| 15:02.45 | adyer | Laurenceb: no it has relocation info and a lot of other stuff |
| 15:02.52 | Madsy | Hex is just a number base, Base 16. It isn't a format at all. |
| 15:03.08 | Laurenceb | hex files have location in flash and checksum |
| 15:03.09 | wmat | Laurenceb: try this tutorial http://userpages.umbc.edu/~tmeyer2/HOWTO-LPC2148.html#ss3.1 |
| 15:03.23 | adyer | Laurenceb: try objdump -x on the elf file to see some of the header info |
| 15:03.32 | Laurenceb | right |
| 15:03.37 | Madsy | What you need is to extract the .text section (code) from the ELF binary. |
| 15:03.44 | Laurenceb | ok |
| 15:03.52 | Madsy | Hopefully CodeSourcery has a tool like that. |
| 15:04.03 | Laurenceb | I plan to us eopen ocd to flash the arm |
| 15:04.34 | Laurenceb | I've seen some tutorials where they passed an elf file to open ocd, is that possible? |
| 15:05.40 | Madsy | Not really. A headless file with code would work. |
| 15:05.56 | Madsy | Because then you could modify the PC register to "jump" to the first instruction. |
| 15:06.27 | adyer | Laurenceb: I suspect what they were doing was running GDB on a host, using it to load elf, and using openocd as the interface between GDB and the target. |
| 15:06.28 | Madsy | It could work with ELF as well, though with a lot of restrictions. |
| 15:07.00 | Laurenceb | adyer: yeah so they were |
| 15:07.21 | Laurenceb | so... where was the code executing? |
| 15:07.40 | Madsy | Anywhere but at a hardware register :-) |
| 15:07.52 | Laurenceb | on a simulator on the pc? |
| 15:08.58 | adyer | Laurenceb: a GDB that's built for 'cross' operation can load ELF and only load the sections you want into target memory over the remote link, or run a simulator. Depends on the GDB target command |
| 15:09.05 | Laurenceb | host= the micro or the pc ? |
| 15:09.20 | Laurenceb | ah ok I understand |
| 15:09.25 | adyer | host is the PC, LPC is the target |
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| 15:09.38 | Laurenceb | hmm so whats involved in actually running code from flash? |
| 15:09.54 | Laurenceb | I think I can get to the point of producing an elf... |
| 15:10.11 | Madsy | You need to write your code to flash. And it can not be an ELF. |
| 15:10.23 | Laurenceb | so elf -> hex - > flash |
| 15:10.43 | Madsy | Not hex. Plain ARM code. |
| 15:10.57 | Laurenceb | but a HEX file? |
| 15:11.11 | Madsy | What is a hex file? As I mentioned, hex is just base16 |
| 15:11.18 | Laurenceb | intel hex file |
| 15:11.20 | Madsy | It says nothing about the data representation. |
| 15:11.24 | adyer | Laurenceb: usually that intermediat is a binary format like raw data, s-records, or intel hex format. depends on the programming tool |
| 15:11.37 | Laurenceb | http://en.wikipedia.org/wiki/.hex |
| 15:11.42 | Madsy | Oh. |
| 15:12.20 | Madsy | Well if you want code which boots, you need raw binary data. Just code. |
| 15:12.25 | Laurenceb | so is there a way to then write flash with open ocd ? |
| 15:12.30 | Madsy | Yes. |
| 15:12.32 | Laurenceb | course |
| 15:12.37 | Laurenceb | right ok |
| 15:13.05 | Laurenceb | theres no risk of bricking the lpc? jtag is all implemeted in hardware right? |
| 15:13.44 | Madsy | Are you going to upload a bootstrap? |
| 15:14.00 | Madsy | And if so, does the device already have one? |
| 15:14.28 | Laurenceb | maybe |
| 15:14.38 | Laurenceb | I need to read the eval board manual |
| 15:14.51 | Laurenceb | but I probably wouldnt bother with a bootstrap |
| 15:15.05 | Laurenceb | bootstrap=bootloader right? |
| 15:15.14 | Madsy | Yes. |
| 15:15.19 | Laurenceb | got you |
| 15:15.32 | Madsy | Often divided in multiple stages. |
| 15:15.35 | Laurenceb | it so complicated :-/ |
| 15:16.01 | Madsy | What exactly is your platform? I just googled the name you mentioned, but I didn't figure out what it is. |
| 15:16.10 | Madsy | A cellphone? Or evaluation board? |
| 15:16.24 | Laurenceb | its an nxp arm7tdmi evaluation board from olimex |
| 15:16.40 | Laurenceb | lpc2148 in the microcontroller |
| 15:16.56 | Laurenceb | it has a jtag port I plan to use |
| 15:17.12 | adyer | Laurenceb: this link looks like it might be useful http://psas.pdx.edu/OlimexLPC2148Setup/ |
| 15:17.13 | Madsy | If it came with a working bootloader, I'd backup the flash before messing with it. |
| 15:17.24 | Laurenceb | yeah |
| 15:18.07 | Laurenceb | adyer: thanks for the link |
| 15:19.16 | adyer | Laurenceb: the .cfg and .script files at the end are probably the most useful parts |
| 15:19.31 | Laurenceb | right |
| 15:19.46 | Laurenceb | I havent got the hardware with me atm - I'll try this evening |
| 15:20.15 | Laurenceb | thanks for pointing me in the right direction... hopefully I'll get it eventualkly :D |
| 15:20.53 | adyer | I know openocd can be a bit of a moving target as far as script commands, so don't get discouraged if the syntax of the commands has changed a bit if you're not on the same svn release |
| 15:21.25 | Laurenceb | I'm sure I could get it running under xp... |
| 15:21.37 | Laurenceb | but one of my aims is to avoid xop completely |
| 15:21.51 | Laurenceb | and make it run under ubuntu |
| 15:22.02 | Laurenceb | <PROTECTED> |
| 15:43.47 | Laurenceb | http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/openocd_intro/index.html#lpc2000int |
| 15:44.15 | Laurenceb | mt_flash <elf-file/hex-file> |
| 15:44.30 | Laurenceb | they are flashing with an elf ?! |
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| 17:23.50 | flavioribeiro | anyone here are familiar with bluesmirf? |
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| 18:23.59 | Mirell | Other than Papa Smurf, nope. |
| 18:32.13 | file | moo. |
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| 20:03.16 | new_Dev | Hi all |
| 20:03.23 | new_Dev | Hi roxfan |
| 20:05.39 | new_Dev | Hi ds2 |
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| 21:50.26 | new_Dev | hi again |
| 21:51.06 | new_Dev | i wanna askhave any one run application in xip mode on uclinux |
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