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printf unsigned long int a;

Andrew Noble
Prodigy 180 points

I can't seem to print out the value of a.

unsigned long int a;

//other code that assigns a value to a.

printf("%lu\n",a);

for some reason it just prints the "u" instead of a.

Is the msp430 different than regular c with this?

  • 0
    Guru 92251 points

    Which version of the MSP430 compiler are you using?

    Some versions had bugs in the printf / sprintf support. 

  • 0
    Guru 227245 points

    For size reasons, there are different levels of printf support. The smallest one AFAIK just ignores any format specifier (the '%' and the following letter). Others implement more or less of the full feature set.
    This can be configured in the project settings.

    Andrew Noble said:
    Is the msp430 different than regular c with this?

    This has nothing to do with MSP430. The printf implementation is a plain compiler-specific thing. A different compiler (and there are at tlest three I know of) may handle it differently.
    Even the support for different levels of printf support is not MSP specific. It does, however, honor the fact that on a microcontroller, code space is usually limited and unnecessary inclusion of unneeded functionality should be avoided.

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