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Problems when using printf

Marc Döbber

Hi !

My program crashes when using printf(). I use MDK ARM V3.0 together with KEIL-Debugger an ARM STR7-Controller.
When program runs in debugger -> no problem.
When disable interrupts -> no problem
When I change the file scat.scf to start the program from address 0x40000000 -> no problem

But I want to use the IAP-Driver in sector 0 and so my program should be able to start at 0x40002000. Is there something wrong with interrupt vectors ?

My program is based on the KEIL-IAP example.

Has anyone on idea?

best regards

Marc

Parents
  • 0 in reply to Robert McNamara

    Hi,

    - when running the program in debugger it always works
    - when running without debugger it only works, when not using printf() or sprintf()

    So I think the question is: What is the problem with functions like printf() and what is the difference when running the programm in debugger?

    I use the following file "scat.scf" for the linker.

    FLASH 0x40002000 0x40000
{
    FLASH 0x40002000
    {
        71x_init.o (Init, +First)
        *.*o (+RO)
    }
    RAM 0x20000000
    {  71x_vect.o (Vect, +First)
        *.*o (+RW)
        *.*o (+ZI)
    }
}

    regards
    Marc

Reply
  • 0 in reply to Robert McNamara

    Hi,

    - when running the program in debugger it always works
    - when running without debugger it only works, when not using printf() or sprintf()

    So I think the question is: What is the problem with functions like printf() and what is the difference when running the programm in debugger?

    I use the following file "scat.scf" for the linker.

    FLASH 0x40002000 0x40000
{
    FLASH 0x40002000
    {
        71x_init.o (Init, +First)
        *.*o (+RO)
    }
    RAM 0x20000000
    {  71x_vect.o (Vect, +First)
        *.*o (+RW)
        *.*o (+ZI)
    }
}

    regards
    Marc

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