I am sure that i miss something here any help? Will automagically move your formating strings to progmem space so it does not eat up precious RAM. This code will create a Printf() function that not only supports printf() capability on the serial port, but also I have attached example code of how to do this. Get the IDE that allows setting the linker option. You will still have to live with the floating point deficiency unless you patch your libraries or To provide some simple printf() support for your code. There is a way to patch your libraries and even some other versions of the IDE floating around that haveīeen patched to allow setting the linker option from the GUI.Īs an alternative, you can use a wrapper with some clever gcc macros (The IDE has the linker options hardcoded inside the java code) And that is where the problem is, the standard/stock IDE currentlyĭoes not provide a way to set the command line options to the linker to specify the floating version of the libraries. Setting a linker option to use a different library. To enable floating support requires using a different version of the xxprintf() routines which requires The xxprintf() routines linked in have floating support removed to save code space. One of the drawbacks of the xxprintf() routines mentioned by others is the lack of floating point support.Īctually, there is floating point support in the AVR libC library xxprintf() functions, it is just that by default ![]() However it requires modifying the Print class code that the Arduino team provides The modifications to the code to add it isn't that difficult, The Print class is what implements the character output within the Serial object. ![]() What you wanting it support for the std C library function printf() to be supported by the Print class.
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