problems while importing freeRTOS to AT32UC3A0512

问题

i am attempting to integrate freeRTOS to my application that run on AT32UC3A0512. I downloaded a freeRTOS project example for EVK1100 (it Supports the AT32UC3A) and try to include the kernel source file so my application hierarchy looks like :

src
   |ASF
   |APP_FOLDER
   |freertos 
       |freertos-7.0.0

this hierarchy is different than the the hierarchy provided in the freeRTOS project example which looks like

  src
   |ASF
       |thirdparty
          |freertos 
              |freertos-7.0.0   /********** freertos-7.0.0 is under ASF***********/

1 - This has caused compilation problems(path of some file not recognized) that i have solved, and i don't think that it can lead to other issues. what do you think?

now it seems also that i have problems with exception.s

  /*my actual appli hierarchy*/
  src
   |ASF
      |AVR32
         |intc
              |exception.s
   |APP_FOLDER
   |freertos 
       |freertos-7.0.0
          |source
              |portable
                  |gcc
                      |avr32_uc3
                          |exception.S

As you see the file is redefined,i came to this solution that consist in removing exception.s under intc folder, now the project compiles but there is calls to twi_master_read in my application that cause blocking, i haven't changed anything in my application(which use to work normally) i didn't call any freeRTOS api function yet,

2- could you please help me undrestand the the purpose of exception.s, and what leaded to this unexpected behaviour ?

3- Could this problem come from the non respect of the hierarchy ?

Don't hesitate to comment on my choices or suggest better practices on importing freeRTOS kernel ?

Thanks in advance.

EDIT

I removed exception.s from freertos-7.0.0/source/portable/gcc/avr32_uc3/exception.S and keep the exception.s file of my starting application, Now using the application hierarchy mentioned above if i exclude freertos directory from the project all works well, if i include the freertos directory twi_master_read causes problems, There is any pins redefinitions in the kernel files and i didn't call/include freeRTOS API at all so how the behaviour changes this way ?

来源：https://stackoverflow.com/questions/38401359/problems-while-importing-freertos-to-at32uc3a0512

标签

assembly

embedded

rtos

freertos