signedness using tilde

#include "stm32f4xx.h" // Device header
void delayMs(int delay);

int main(void)
	{
		RCC->AHB1ENR |=1;									//ENABLE GPIOA clock
		GPIOA->MODER |= 0x00000400;						// ob 0000 0000 0000 0000 0000 0100 0000 0000
		
		while(1)
			{
				GPIOA->ODR = 0x00000020;
				delayMs(500);
				GPIOA->ODR &=~0x20;
				delayMs(500);
				
			}
		}
	
void delayMs(int delay)
	{
		int i=0;
		
		for(;delay>0;){
				delay --;
				for (i=0;3195;i++);
			}
	}