Common format for initializing GPIO

Common format for initializing GPIO:

GPIO_InitTypeDef GPIO_InitStructure; // Reference two structures 

// GPIO is a peripheral mounted on the APB2 bus, using RCC_APB2PeriphClockCmd () to achieve. 
RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOA | 
RCC_APB2Periph_GPIOD, the ENABLE); // enable PA, PD port clock 

// set pin mode, the speed 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_2; // PA.8, PD.2 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // Push-pull output 
GPIO_InitStructure.GPIO_Speed ​​= GPIO_Speed_50MHz; // Speed ​​50MHz

 
GPIO_Init (GPIOA, & GPIO_InitStructure); // Configure GPIO according to the setting parameters 
GPIO_SetBits (GPIOA, GPIO_Pin_8); // Output 1
 //GPIO_ResetBits (GPIOA, GPIO_Pin_8); // Output 0 
GPIO_Init (GPIOD, & GPIO_InitStructure); // Configure GPIO according to setting parameters 
GPIO_SetBits (GPIOD, GPIO_Pin_8); // Output 1