STM32F746G Binary size exceeds rodata’ will not fit in region `FLASH

[RAJEESH RARANKURISSI]

Posted on March 08, 2018 at 06:06

I am using STM32F746G Discovery board . I am facing an issue with image size.

My binary size is more than 1MB and gets an error

c:/ac6/systemworkbench/plugins/fr.ac6.mcu.externaltools.arm-none.win32_1.15.0.201708311556/tools/compiler/bin/../lib/gcc/arm-none-eabi/6.3.1/../../../../arm-none-eabi/bin/ld.exe: STM32F746emWin.elf section `.rodata’ will not fit in region `FLASH’

c:/ac6/systemworkbench/plugins/fr.ac6.mcu.externaltools.arm-none.win32_1.15.0.201708311556/tools/compiler/bin/../lib/gcc/arm-none-eabi/6.3.1/../../../../arm-none-eabi/bin/ld.exe: region `FLASH’ overflowed by 106964 bytes

collect2.exe: error: ld returned 1 exit status

makefile:43: recipe for target ‘STM32F746emWin_ATMEGD10.elf’ failed

make: *** STM32F746emWin.elf Error 1

How can I keep my image in external flash and execute from there

Can I use internal and external flash together continuesly .

How can I do this ? Can any body help me to do it 

[Uwe Bonnes]

Posted on March 08, 2018 at 10:38

You cannot  flash more than one 1 MiB in a chips that has only 1 MiB Flash. There are two things to consider:

- Why is the image that big?

- Ths STM32F746G has the same die as a STM32F746I. Either the flash above 1 MiB is switched of with some fuse, not tested or tested bad. Try to link for STM32F746I, flash  and compare the result. Perhaps you have luck.

[RAJEESH RARANKURISSI]

Posted on March 08, 2018 at 10:49

Thank you.

Image became big that i am using more bmp images in code . 

So it increases to more than 1MB

So I am trying to put binary in External Flash of STM32F746Discovery board

Discovery board has 128-Mbit Quad-SPI Flash memory

128-Mbit SDRAM (64 Mbits accessible). 

But I don't have idea to work in external Flash 

[Uwe Bonnes]

Posted on March 08, 2018 at 11:32

So use the right section indicator in your code to put the BMP file into QSPI. Do not forget to initialize QSPI in your code.