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FreeRtos on Microblaze inside Zynq

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fayyazrafiq's picture
FreeRtos on Microblaze inside Zynq

I am using Microblaze on Zynq FPGA using Zedboard. I successfully design my hardware and also successfully test the bare metal application on microblaze. Now, I am trying to use FreeRtos on Microblaze. I download the freertos port from ( and create a BSP as given on the website. After generating the BSP, when I wanted to create application using freertos, in the dialog box, no freertos application visible to me. What, I did, I just create an application simple helloworld (bare metal) but I include the freertos BSP. Later on, I copied the freertos_application source code and pasted into the main.c of my helloworld application. When I run the application, I got the following error: Note(I am using BRAM (64kB I and 64KB Data) within microblaze hardware). Although the program is not too big, still I am getting error. I also checked with BSP settings (GUI), where the Stack Size=120 B and HeapSize Value= 1024, default=65535. I am really stuck at this point. Please help me to sort out this.

make all
Building target: app_mb_freertos.elf
Invoking: MicroBlaze gcc linker
mb-gcc -Wl,--no-relax -Wl,-T -Wl,../src/lscript.ld -L../../mb_freertos_bsp_0/microblaze_0/lib -mlittle-endian -mxl-pattern-compare -mcpu=v8.40.b -mno-xl-soft-mul -o"app_mb_freertos.elf" ./src/helloworld.o ./src/platform.o -Wl,--start-group,-lxil,-lfreertos,-lgcc,-lc,--end-group
c:/xilinx/14.3/ise_ds/edk/gnu/microblaze/nt64/bin/../lib/gcc/microblaze-xilinx-elf/4.6.2/../../../../microblaze-xilinx-elf/bin/ld.exe: app_mb_freertos.elf section `.text' will not fit in region `microblaze_0_i_bram_cntlr_microblaze_0_d_bram_cntlr'
c:/xilinx/14.3/ise_ds/edk/gnu/microblaze/nt64/bin/../lib/gcc/microblaze-xilinx-elf/4.6.2/../../../../microblaze-xilinx-elf/bin/ld.exe: region `microblaze_0_i_bram_cntlr_microblaze_0_d_bram_cntlr' overflowed by 29048 bytes
collect2: ld returned 1 exit status
make: *** [app_mb_freertos.elf] Error 1