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| 07:02.56 | aproemel | good morning |
| 07:03.04 | aproemel | vmaster_: need your help again |
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| 08:34.03 | vmaster_ | hey aproemel |
| 08:34.45 | aproemel | hi :-) |
| 08:34.55 | aproemel | my problem is, how to debug my code ^^ |
| 08:35.06 | aproemel | i tried to use eclipse but it failed :-( |
| 08:36.15 | aproemel | the main problem is, i think that a interrupt won't be serviced |
| 08:36.51 | aproemel | I used the ATMEL XModem and Tempo Service, the code seemes to be OK |
| 08:37.25 | aproemel | but if i start the code, the Xmodem Service opens the pipe and then don't print the "C" to DBGU |
| 08:38.13 | aproemel | if i "halt" the programm with the telnet feature of openocd |
| 08:38.20 | aproemel | and make step by step debugging |
| 08:39.28 | aproemel | my programm hangs in the while(1) and should wait there till finish the file transfer |
| 08:45.02 | vmaster | aproemel: i'll have breakfast and look into your problem in about 20 minutes |
| 08:45.09 | aproemel | ok, thanks |
| 09:18.26 | vmaster | aproemel: ok, i've never debugged anything with Eclipse myself - I find it too cumbersome to debug with an IDE |
| 09:18.45 | aproemel | with which program do you debug ? |
| 09:18.53 | vmaster | aproemel: I use the plain GDB |
| 09:19.08 | aproemel | ok |
| 09:19.32 | vmaster | aproemel: run your arm-xxx-gdb with your application as the only argument |
| 09:19.51 | aproemel | on my pc? |
| 09:19.52 | vmaster | aproemel: on the GDB prompt connect to the OpenOCD: target remote localhost:3333 |
| 09:19.55 | vmaster | aproemel: yeah |
| 09:20.07 | aproemel | ok |
| 09:20.21 | aproemel | with the debug informations, i have to build c code with -d or ? |
| 09:20.33 | vmaster | with -g |
| 09:22.09 | aproemel | should i upload the file first? |
| 09:22.15 | aproemel | or first start gdb ? |
| 09:22.29 | vmaster | you can use the GDB to upload your file, too |
| 09:22.58 | vmaster | after attaching, just issue the "load" command |
| 09:23.18 | aproemel | ok, i test it right now |
| 09:24.22 | aproemel | mhh, do I need the .out or the .bin file for debuggig ? |
| 09:24.33 | vmaster | the .out |
| 09:24.40 | aproemel | but i have to upload the bin |
| 09:24.47 | aproemel | because the .out is too large |
| 09:25.03 | vmaster | GDB understands the ELF format, and uploads only the sections containing code and data |
| 09:26.15 | aproemel | Invalid download offset |
| 09:26.34 | aproemel | maybe my whitespace in my folder name ? |
| 09:26.47 | vmaster | could you paste the line you entered and the reply? |
| 09:28.03 | aproemel | works now |
| 09:28.12 | aproemel | my folder was named "Loader v1" |
| 09:28.24 | aproemel | and it fails, I renamed it to "Loader_v1" and it works |
| 09:28.50 | vmaster | lol, ok |
| 09:29.05 | aproemel | do you have a good howto for plain gdb ? |
| 09:29.32 | vmaster | i'm sure there are howtos, but i don't know any |
| 09:29.43 | aproemel | ok, i'll take a look |
| 09:29.57 | aproemel | thanks a lot :-) |
| 09:30.03 | vmaster | you have to enter "monitor arm7_9 sw_bkpts enable" to tell the OpenOCD to use software breakpoints |
| 09:30.35 | vmaster | these are off by default as they occupy one of only two breakpoint units which could be needed for hardware breakpoints |
| 09:32.28 | vmaster | when using the GDB for remote debugging you have to know that you can't "run" your application like you would when using the GDB for a local application |
| 09:33.33 | aproemel | mhh, how do i do it then? |
| 09:33.42 | vmaster | instead you "load" it, which also sets the PC to the application's entry point, and then just "continue" or "step", or "stepi" (single asm instruction) or "next" or "nexti" |
| 09:34.23 | aproemel | ok |
| 09:44.43 | aproemel | if i type "continue" the target should run till braikpoint, right ? |
| 09:47.01 | vmaster | yes |
| 09:47.22 | vmaster | you can abbreviate almost every command - a single 'c' works, too |
| 09:48.14 | aproemel | i typed continue and no halt appears |
| 09:48.17 | aproemel | i set 2 points |
| 09:48.20 | aproemel | break main |
| 09:48.36 | aproemel | break AT91F_ST_DBGU_Handler |
| 09:49.01 | vmaster | type "monitor arm7_9 sw_bkpts" |
| 09:49.05 | vmaster | what does it say? |
| 09:49.06 | aproemel | i typed |
| 09:49.07 | aproemel | load |
| 09:49.12 | aproemel | monitor ... |
| 09:49.16 | aproemel | break ... |
| 09:49.18 | aproemel | break ... |
| 09:49.20 | aproemel | continue |
| 09:49.57 | aproemel | now gdb hangs :-( |
| 09:50.15 | vmaster | uhm, no, it doesn't hang, it's just waiting for something to happen |
| 09:50.22 | vmaster | you can interrupt it with <ctrl><c> |
| 09:50.27 | aproemel | ok |
| 09:50.41 | vmaster | you only get a GDB prompt when the application is halted |
| 09:51.02 | vmaster | any warnings or errors in the OpenOCD output? |
| 09:52.13 | aproemel | Error: arm7_9_common.c:1748 arm7_9_read_memory(): memory read caused data abort |
| 09:53.49 | vmaster | ok, that one isn't necessarily a problem - when the GDB tries to unwind stack information and reaches the top-level frame it will try to read from bogus addresses |
| 09:54.57 | aproemel | step |
| 09:55.08 | aproemel | cannot find bounds of current function |
| 09:55.28 | aproemel | I'm currently in my startup.s |
| 09:56.15 | vmaster | "step" and "next" operate on source lines - when you're in an assembly function you can only use "stepi" and "nexti" to single-step single instructions |
| 09:56.22 | vmaster | step steps into, next steps over |
| 09:56.57 | aproemel | next works and goes to the nex label |
| 09:58.55 | aproemel | maybe i know why the continue fails |
| 09:59.07 | aproemel | on which speed does the target run? |
| 09:59.15 | vmaster | hum? |
| 09:59.35 | aproemel | does the prozessor run with 180Mhz like in normal operation mode? |
| 10:00.19 | vmaster | it operates at whatever it operated before |
| 10:00.23 | vmaster | GDB doesn't touch any of this |
| 10:00.51 | aproemel | i though it could be my waitstates in my while() |
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| 12:07.49 | aproemel__ | vmaster: do you have 5min agein ? |
| 12:07.54 | aproemel__ | again |
| 12:09.40 | vmaster | sure |
| 12:10.20 | aproemel__ | i know why my code wouldn't work if i upload it with jtag |
| 12:10.43 | aproemel__ | i use the feature of automatically remap at upload with DBGU |
| 12:11.00 | vmaster | ah, yeah, i remember that |
| 12:11.12 | aproemel__ | now i'm searching for the failure of not serviced AIC Routine |
| 12:11.51 | aproemel__ | did you use the ATMEL API for your loader? |
| 12:13.43 | aproemel__ | I having an interrupt for the "System Timer" and the DBGU |
| 12:13.59 | aproemel__ | but this wouldn't serviced :-( |
| 12:14.08 | vmaster | no, the u-boot does all of this itself (and basic at91rm9200 support was already there) |
| 12:14.28 | vmaster | aproemel__: the ARM9 has a "vector catch register" |
| 12:14.39 | aproemel__ | but you have to upload uboot to the AT for the first time |
| 12:15.21 | vmaster | aproemel__: i simply used the OpenOCD's flash feature to write the image to the NOR flash my board had |
| 12:15.37 | vmaster | aproemel__: you can use the vector catch to trap IRQ and FIQ |
| 12:15.48 | vmaster | aproemel__: enter "monitor reg" to get a list of registers |
| 12:16.12 | vmaster | aproemel__: i believe i called the vector catch reg "vec_catch" or something like that |
| 12:16.31 | vmaster | aproemel__: ah, it's "vector catch" |
| 12:16.34 | aproemel__ | vmaster: the flash feature i want to use too, but I'm forced to write a DBGU loader :-( |
| 12:17.11 | vmaster | aproemel__: you can set that registers with "reg #number 0xvalue" |
| 12:17.25 | aproemel__ | i'll try |
| 12:18.39 | vmaster | aproemel__: setting it to 0xc0 should catch IRQ and FIQ |
| 12:24.36 | aproemel__ | vmaster: mhh, i'm looking for the right reg |
| 12:25.53 | aproemel__ | because i opend the AIC and tell it the service routine for the interrupt |
| 12:30.26 | aproemel__ | oh, in gdb mode i'll get a Prefetch Abort |
| 12:36.00 | aproemel__ | without gdb the error wont occure |
| 12:38.29 | aproemel__ | vmaster: if i wont get the loader working, i'll upload the uboot image with Jtag |
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