I've compiled a project as a library for stm32 using iar, after adding the .a file the linker gives a warning that the used functions are declared implicity. The function accepts a pointer to input buffer and return a pointer to output buffer, when assiging a pointer to save the return address the complier gives an error that a value of intcan't be assigned to pointer.
What could be the error, or. Is there something missing in the way of adding lib
You need the .h file as well with the data structures & function prototypes.