Flash memory overflow about modbus-stm32-slave-example

[felipengeletrica]

I was able to compile but I don't have hardware to test using memory optimization

CFLAGS += -g -gdwarf-2 -Os -flto

[liyanboy74]

you have error will not fit in region . in this example i use low memory micro stm32f03, 16KB flash and 4KB ram. i think modbus lib need 4KB to run. also i don't show error when run make on windows and it done successfully .

file: myTerminalOut.txt

   text    data     bss     dec     hex filename
  16000     128    1984   18112    46c0 build/MBTest.elf

I try make on linux and get same as your error!
let me fix that ...

[liyanboy74]

I want to change micro stm32f03 to stm32f103(blue pill). it's Ok?

[liyanboy74]

It's Done!
I change code for STM32F103C8T6 (Blue Pill) for better developing and extend flash size.
The old code also available

[liyanboy74]

Keep in mind that the current project I developed, used a virtual USB COM Port called USB CDC mode. simply u can change code for using hardware UART in physical MODBUS network but just for the simplicity of the project i use USB CDC mode for example.

[felipengeletrica]

Greetings,
Thanks a lot for the reply and the changes. But I would like to use a low-cost microcontroller from STM.
The bluepill I have to test the new code.

[liyanboy74]

I still don't understand the reason for the increase in prog size during compilation on Linux.