CLEAR_BIT and SET_BIT

Hi Westermark,

I'd like to control just one bit as "1" and "0",
"int" variable is 8 bit but I need just one bit.

Also If you help me how to create just one bit variable, I appreciated

IDE: Keil uVision-5
MCU: STM32F030R8- Cortex M0 CPU

/*ON-OFF Control with BUTTON*/

#define BUTTON       GPIO_PIN_0
#define LED             GPIO_PIN_8
int a=0x1;
int b=0x1;

       while(1)
                if(!HAL_GPIO_ReadPin(GPIOA, BUTTON))
                        {
                          a=0;  // How to use CLEAR_BIT instead of "a=0;"
                          b=1;  // How to use SET_BIT instead of "b=1;"
                        }
                if(a==1)
                {
                        HAL_GPIO_WritePin(GPIOC, LED, GPIO_PIN_SET);
                        b=1;
                        a=0;

                }

                if(a==0)
                {
                        HAL_GPIO_WritePin(GPIOC, LED, GPIO_PIN_RESET);
                        b=0;
                        a=1;
                }
}

Thanks,
Mehmet

So - how to set a single bit in a byte? Isn't that a part of the C language course you are taking?

And why do you need it for your own variables, if you already have HAL_xx() functions to operate on the actual GPIO pins?

Another thing - you don't think it's a good thing to use your while statement with a {} around the body? And who will ever known the meaning of variables named "a" and "b"? The variable names would possibly be meaningful if they stored the number of "a" and "b" found in a text file.