I am writing a C program for SAM3N arm cortex-M3 microcontroller. When I try to print float numbers, it just prints 'f'. Example: printf("%f",43.12); prints f only, not the 43.12.

But printing with integers works fine.

How to enable full printing of floats? I know that the compiler, by default, disabled float printing to reduce code size (i.e. seems, they linked cut-down version). Also please note that, there is no CFLAGS=-Dprintf=iprintf used in makefile.

Tools details:

  • ARM/GNU C Compiler : (crosstool-NG 1.13.1 - Atmel build: 13) 4.6.1
  • Above tool come with Atmel studio 6.0.
c gcc arm printf
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