FLASH and estimated RAM Usage

Procedure

To know the FLASH and an estimate of the RAM usage,

• Find the location of the size utility

For MSP430

  /Applications/Energia.app/Contents/Resources/Java/hardware/tools/msp430/bin/msp430-size

For Stellaris LM4F

  /Applications/Energia.app/Contents/Resources/Java/hardware/tools/lm4f/bin/arm-none-eabi-size

• Compile a sketch and find the location of the elf file –see attached screen-shots on how to find the location on the console

  /var/folders/kd/70m4ltxn14l086ddy860ff3c0000gn/T/build7439050874009286986.tmp/Blink.cpp.elf`

• Open a terminal window and type the command

For MSP430

   $/Applications/Energia.app/Contents/Resources/Java/hardware/tools/msp430/bin/msp430-size /var/folders/kd/70m4ltxn14l086ddy860ff3c0000gn/T/build7439050874009286986.tmp/Blink.cpp.elf
   text	   data	    bss	    dec	    hex	filename
    590	      0	      6	    596	    254/var/folders/kd/70m4ltxn14l086ddy860ff3c0000gn/T/build7439050874009286986.tmp/Blink.cpp.elf

For Stellaris LM4F

   $/Applications/Energia.app/Contents/Resources/Java/hardware/tools/lm4f/bin/arm-none-eabi-size /var/folders/kd/70m4ltxn14l086ddy860ff3c0000gn/T/build6836538960609975065.tmp/Blink.cpp.elf
   text	   data	    bss	    dec	    hex	filename
   2004	      0	    200	   2204	    89c	/var/folders/kd/70m4ltxn14l086ddy860ff3c0000gn/T/build6836538960609975065.tmp/Blink.cpp.elf

• Do the maths

  text + data = FLASH
  bss + data = estimated SRAM

Please note this is only an estimate, but if the estimated SRAM is close to the maximum, you're going to experience some problems.

Maximum FLASH and RAM

Remember

• MSP430G2452 = 8 KB of FLASH and 256 bytes of RAM
• MSP430G2553 = 16 KB of FLASH and 512 bytes of RAM
• Stellaris LM4F120H5QR = 256 KB FLASH and 32 KB RAM

Finding the Location of the elf file

To find the location of the elf file

• Select Show verbose output during compilation in Preferences

• Copy the full path of the elf file from the console