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STM32F413ZG Program Size - code, RO-data,RW-data,ZI-data

June Zhou

Hello,

I use STM32F413ZG that has 1.5M Bytes flash and 320K bytes RAM. When I use Keil uvsion5 to finish Compile, I get the below information 

Program Size: Code=902,730 RO-data=594,458 RW-data=4,380 ZI-data=323,084

According to document said:

ROM(Flash)=Code + RO-data= 902,730 + 594,458 =1, 497,188, is very close to 1.5M flash?

RAM=ZI + RW = 323,084 + 4,380 =327,464 , is larger than 320K RAM ? 

I confused why the RAM larger than 320k,  my program still can run correctly?

And the flash close to 1.5M , that means I cannot add ne function in the future?

Is there any way I can reduce the RAM and ROM usage?

Thank you so much !

Parents
  • +1

    1.5MB is 1572864 bytes

    320KB is 327680 bytes

    >>Is there any way I can reduce the RAM and ROM usage?

    Use subroutines, use optimization, stop allocating large static arrays, perhaps use variable widths appropriate to the range of content expected to be stored?

    Review how you're using it now, and decide who the biggest consumers are, and perhaps if there is overlap where two separate allocations can be folded into one?

Reply
  • +1

    1.5MB is 1572864 bytes

    320KB is 327680 bytes

    >>Is there any way I can reduce the RAM and ROM usage?

    Use subroutines, use optimization, stop allocating large static arrays, perhaps use variable widths appropriate to the range of content expected to be stored?

    Review how you're using it now, and decide who the biggest consumers are, and perhaps if there is overlap where two separate allocations can be folded into one?

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