STM32 library function port initialization description

The following only describes the operation ports of these two MCU library functions.

1. Port function description
STM32F0 series
typedef struct
{
  uint32_t GPIO_Pin; //Pin configuration
  
  GPIOMode_TypeDef GPIO_Mode; //Port mode
  GPIOSpeed_TypeDef GPIO_Speed; //Pin speed
  GPIOOType_TypeDef GPIO_OType; //Output setting
  GPIOPuPd_TypeDef GPIO_PuPd; //Pin setting
}GPIO_InitTypeDef;


typedef enum
{
  GPIO_Mode_IN = 0x00, //Input
  GPIO_Mode_OUT = 0x01, //Output
  GPIO_Mode_AF = 0x02, //Floating input 
  GPIO_Mode_AN = 0x03 //Analog input

}GPIOMode_TypeDef;

typedef enum
{
  GPIO_OType_PP = 0x00, //Push-pull
  GPIO_OType_OD = 0x01 //Open drain
}GPIOOType_TypeDef;


typedef enum
{
  GPIO_Speed_Level_1 = 0x01, //Medium speed
  GPIO_Speed_Level_2 = 0x02, //Low speed
  GPIO_Speed_Level_3 = 0x03 //High speed
}GPIOSpeed_TypeDef;


typedef enum
{
  GPIO_PuPd_NOPULL = 0x00, //No pull-up and pull-down
  GPIO_PuPd_UP = 0x01, //Pu-up
  GPIO_PuPd_DOWN = 0x02 //Pu-down
}GPIOPuPd_TypeDef;
------------------------------------------------------------

STM32F1 series

typedef struct
{
  uint16_t GPIO_Pin; //Pin configuration
  
  GPIOSpeed_TypeDef GPIO_Speed; //Pin speed
  GPIOMode_TypeDef GPIO_Mode; //Port mode
}GPIO_InitTypeDef;


typedef enum
{ GPIO_Mode_AIN = 0x0, //Analog input
  GPIO_Mode_IN_FLOATING = 0x04, //Floating input
  GPIO_Mode_IPD = 0x28, //Pull-down input
  GPIO_Mode_IPU = 0x48, //Pull-up input
  GPIO_Mode_Out_OD = 0x14, //Open drain output
  GPIO_Mode_Out_PP = 0x10, //Push-pull output
  GPIO_Mode_AF_OD = 0x1C, //Open drain multiplexing
  GPIO_Mode_AF_PP = 0x18 //Push-pull multiplexing
}GPIOMode_TypeDef;


typedef enum
{ 
  GPIO_Speed_10MHz = 1, //10MHz
  GPIO_Speed_2MHz, //2MHz
  GPIO_Speed_50MHz //50MHz
}GPIOSpeed_TypeDef;


2. Initialization function body


STM32F0 series
void Myport_Init(void)
{
/*Define a structure of type GPIO_InitTypeDef*/
GPIO_InitTypeDef GPIO_InitStruct; 
/*Turn on the peripheral clock of GPIOA*/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/*Set the controlled GPIOA pin*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;
/*Set the port mode of the controlled GPIOA pin*/
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
/*Set the pin setting of the controlled GPIOA pin*/
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
/*Set the pin rate to high speed*/
GPIO_InitStruct.GPIO_Speed ​​=GPIO_Speed_Level_3;
/*Call library function to initialize GPIOA*/
GPIO_Init(GPIOA, &GPIO_InitStruct);
}


STM32F1 series
void Myport_Init(void)
{
/*Define a structure of type GPIO_InitTypeDef*/
GPIO_InitTypeDef GPIO_InitStructure;
/*Turn on the peripheral clock of GPIOC*/
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOC, ENABLE); 
/*Select the GPIOC pin to be controlled*/   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; 
/*Set the pin mode to general push-pull output*/
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;   
/*Set the pin rate to 50MHz */   
  GPIO_InitStructure.GPIO_Speed ​​= GPIO_Speed_50MHz; 
/*Call library function to initialize GPIOC*/
  GPIO_Init(GPIOC, &GPIO_InitStructure);  
}