Over flow flash memory

[vchau.2]

Dear All,

I'm using STM32G0 with 64KB of flash memory and 8KB of RAM

if optimization is OFF, its giving error as below

 

and if optimization is ON Level-1 

its not giving any error

So let me know what kind of error i'm facing 

Compiler - keil

 

[mƎALLEm]

Hello,

Simply you are exceeding the flash memory size.

In fact your application is at the limit of the flash size 64kB. If you enable the optimization your binary < 64kB and that fits in the Flash and if you disable the optimization, the binary > 64kB exceeding the memory size of the MCU.

[vchau.2]

But when optimization is of level-1 than occupy flash size is 27KB only, how its possible to optimize the code size more than half 

[mƎALLEm]

Hello,

Maybe you need to contact ARM for such kind of behaviour over this link:

https://community.arm.com/support-forums/f/keil-forum

[TDK]

> Over flow flash memory

> So let me know what kind of error i'm facing 

You answered it yourself. The code is larger than the flash size you have available.

Potential solutions:

• Refactor the code to use less memory
• Compile with optimizations on
• Buy a chip with more flash

[gbm]

My guess is: you are using trial/resrticted version of MDK-ARM with 32 KiB size limit.

Solutions:

1. Switch to STM32CubeIDE.

or

2. Enable STM32F0/G0 license. This will unlock the size limit but lock your MDK-ARM to F0/G0, so you won't be able to use it with any other microcontroller.