I am declaring a static function in a header file and initializing it in .C file but i get a warning that says:unused function.
header file:
static void SetLEDPort2Output(void); .c file:
static void SetLEDPort2Output(void) { for(int i = 0;i < 7;i++) { LEDPort.aGPIO[i]->CRL &= ~(0x0Fu<<(4*LEDPort.aPIN[i])); LEDPort.aGPIO[i]->CRL |= (0x01<<(4*LEDPort.aPIN[i])); } } void LEDPortIni(void) { RCC->APB2ENR |= 0x1<<2; SetLEDPort2Output(); } I do not know what am i missing here.
in C, static functions are defined per compilation unit: What does "static" mean in C?
This means that every file that includes your header is going to have its own copy of this function declaration (possibly without a definition, since you defined it in your .c file), and the compiler is likely warning you that some of these copies are not used.
If you don't have a particular reason for your SetLEDPort2Output function to be static, you can declare and define it normally:
void SetLEDPort2Output(void); 