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TCPnet & FLASHfs in RTX

Selso LIBERADO

Hi all !

Info : working uVision V3.60 on MCB2300

I created an application using theses guidelines :
Add RTX to my project : www.keil.com/.../rlarm_ar_create_newapp.htm

 - Copy the RTX_config
 - Modify device startup
 - Add a retarget.c file with "#pragma import(__use_no_semihosting_swi)
"

Don't Add SWI file as it is not need (no user swi) :
http://www.keil.com/support/man/docs/rlarm/rlarm_ar_hints_arm.htm

Add TCPnet task in that way :
www.keil.com/.../rlarm_tn_using_withkernel.htm

When I compiled there was an error regarding to "__use_no_semihosting_swi" : It said that _sys_open was referenced.
SO I understand that I had to retarget this function, and found it in FlahsFS example. No pb for me as I will need to use SDcard So that use the FlashFS retarget.c

So Finally I added in projet libs TCTP/TCTPD/FS_ARM driver LPC23_EMAC & MCI_LPC23 (needed by File_config).

But when I run the simulator I got the following error :
Data Abort: ARM Instruction at 00000128H, Memory Access at FFE0800H.

What does it mean ?

Parents Reply Children
  • 0 in reply to Selso LIBERADO

    I used the following method to check could be wrong.
    http://www.keil.com/support/docs/3080.htm

    At this address I fall in startup code in
    "Setup External Memory Controller" line

     STR   R4, [R0, #EMC_CTRL_OFS]

    .

    So at this point I just compared the RTX_config that I got from
    C:\Program Files\Keil\ARM\Startup\Philips\RTX_Conf_LPC23xx.c

    And the one that is working in MCB2300/FlashFS/SD_File example and I see :

    Heap Size was 0 for me and x800 for FlashExample
    No EMC setup in flash example ??!!!

    So I disabled EMC setup and well I manage to go until main() function.

    Did I copy wrong RTX_config file ? If not why is EMC enable by default ?

    Anyway I really did like the way KEIL showed howto debug it.

    I also defined a heap size but still see on keil doc how to correctly define it.

  • 0 in reply to Selso LIBERADO

    There was an error in what I told before : ECM config is not in RTX_config file but startup file. The thing is that I restarting from zero the project and the default startup file enables the ECM.