Memory Footprint With a Thermometer Example on Energia

[Rei Vilo 695]

Compared to other embedded computing platforms, the MSP430 puts memory usage under heavy stress.

 

What are the consequences of the programming style?

 

I took a basic thermometer example with a moving average algorithm and played with different options.

 

Thermometer_basic.zip

Thermometer_function.zip

Thermometer_class.zip

Thermometer_library.zip

[bluehash 1,581]

Thanks Rei,

This is an awesome test.

[Rickta59 589]

Compared to other embedded computing platforms, the MSP430 puts memory usage under heavy stress.

 

I'm not sure I would agree with that. As with everything, It all depends on what you are doing. If you take the ASCIITable example and compile it on Energia 1.0 it only uses 1,518 bytes. On Arduino 1.0 that same example needs 2704 bytes. BlinkWithoutDelay on Energia is 628 bytes, on Arduino it is 1002 bytes. Depending on the chip ( g2231 vs g2553 ) it can be smaller or larger depending on what the code does.

 

I don't see how that puts memory usage under heavy stress.

 

-rick

[Rei Vilo 695]

I performed a test with a basic blinking LED sketch (embed1 attached below) compiled by the different Processing-based Wiring-derived IDEs, with their default parameters.

 

Here are the results:

Good news, the LaunchPad delivers the more compact executable.

 

As Rickta59 rightly points out,

it all depends on what you are doing.

But the news is worth knowing it.

embed1.zip

[oPossum 1,083]

It only takes 5 words to make an LED blink on MSP430

 

        ; Blink LED on P1.1 - This will work on most MSP430
        .def     main
main:    .word    0x4392, 0x0022, 0xE392, 0x0021, 0x3FFF		

[energia 485]

Thanks for running those test Rei Vilo! Great to know!

[Nytblade 24]

Any size difference between the code generated by the TI C Compiler versus GCC?

[xv4y 46]

With Arduino (I don't know about the Due), you don't have the full 32kb for you, around 2kb is used by the bootloader.

 

Yan.

[RichardVowles 12]

I'm just working on exactly this problem and man, is that Adafruit code flabby or what?

 

I'm doing mine in Energia as well, but it will use way way less memory.

[yyrkoon 250]

I'd like to get my hands on the innards someday, and tweak it for even less memory usage ( by default )

[Rickta59 589]

I'd like to get my hands on the innards someday, and tweak it for even less memory usage ( by default )

The code is all there to see: https://github.com/energia/Energia/tree/master/hardware/msp430/cores/msp430

 

We aren't wasting that much memory or code space.