"STM" IO port configuration library functions, registers, bit operation mode

Library function functions:

An initialization function: Initializes the operating mode, output type, speed, and pull-down mode of one or more IO ports (the same group)

1 voidGpio_init (gpio_typedef* Gpiox, gpio_inittypedef*gpio_initstruct);2typedefstruct3 {4uint32_t Gpio_pin//Specify the port to initialize5Gpiomode_typedef Gpio_mode;//Port Mode6Gpiospeed_typedef Gpio_speed;//Speed7Gpiootype_typedef Gpio_otype;//Output Type8Gpiopupd_typedef gpio_pupd;//pull up or pull down9}gpio_inittypedef;

0 Gpio_init Function Initialization example:   
1 gpio_inittypedef gpio_initstructure;2 3Rcc_ahb1periphclockcmd (Rcc_ahb1periph_gpiof, ENABLE);//Enable GPIOF clock4 5   //GPIOF9,F10 Initialization Settings6Gpio_initstructure.gpio_pin = Gpio_pin_9 | gpio_pin_10;//LED0 and LED1 corresponding IO ports7Gpio_initstructure.gpio_mode = Gpio_mode_out;//Normal Output mode8Gpio_initstructure.gpio_otype = gpio_otype_pp;//push-Pull output9Gpio_initstructure.gpio_speed = Gpio_speed_100mhz;//100MHzTenGPIO_INITSTRUCTURE.GPIO_PUPD = gpio_pupd_up;//Pull Up OneGpio_init (Gpiof, &gpio_initstructure);//Initialize GPIOF9,F10

Two read input level functions:

uint8_t gpio_readinputdatabit (gpio_typedef* gpiox, uint16_t gpio_pin); Read input level of a GPIO
uint16_t Gpio_readinputdata (gpio_typedef* gpiox); Read input level of a set of GPIO

Two read output level functions:

uint8_t gpio_readoutputdatabit (gpio_typedef* gpiox, uint16_t gpio_pin); Read the output level of a GPIO
uint16_t Gpio_readoutputdata (gpio_typedef* gpiox); Read output level of a set of GPIO

Four sets the output level function:

void Gpio_setbits (gpio_typedef* gpiox, uint16_t gpio_pin), setting an IO port output high
void Gpio_resetbits (gpio_typedef* gpiox, uint16_t gpio_pin), setting an IO port output low level

Below two not commonly used
void Gpio_writebit (gpio_typedef* gpiox, uint16_t gpio_pin, bitaction bitval);
void Gpio_write (gpio_typedef* gpiox, uint16_t portval);

library function steps:

Enable IO port clock, call function Rcc_ahb1periphclockcmd ();
The clock enable function may not be the same for different peripheral calls
Initialize IO port mode, call function Gpio_init ();
Operation IO port, output high and low level.
Gpio_setbits ();
Gpio_resetbits ();

"STM" IO port configuration library functions, registers, bit operation mode