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PA3 GPIO problem Stm32f107

Parisa Mohamadi

Hi,
Here is my GPIO settings for PA3

                GPIO_InitTypeDef GPIOSt;
                RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
                GPIOSt.GPIO_Mode=GPIO_Mode_Out_PP;
                GPIOSt.GPIO_Pin=GPIO_Pin_3;
                GPIOSt.GPIO_Speed=GPIO_Speed_50MHz;
                GPIO_Init(GPIOA,&GPIOSt);

But
GPIO_SetBits(GPIOA,GPIO_Pin_3);
it doesn't work. and I can't see any voltage higher than 0.14 volt. what is my mistake?

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