Stm32 --- Key Learning

# Include "stm32f10x. H"
Gpio_inittypedef gpio_initstructure; // declare gpio_initstructure
Void led_init (){
Rcc_apb2periphclockcmd (rcc_apb2periph_gpioa, enable); // enable gpioa clock
Gpio_initstructure.gpio_pin = gpio_pin_4;
Gpio_initstructure.gpio_mode = gpio_mode_out_pp; // push the output
Gpio_initstructure.gpio_speed = gpio_speed_50mhz; // maximum output rate: 50 MHz gpio_init (gpioa, & gpio_initstructure); // initialize gpioa}
Void beep_init (){
Rcc_apb2periphclockcmd (rcc_apb2periph_gpiod, enable); // enable gpiod clock
Gpio_initstructure.gpio_pin = gpio_pin_3;
Gpio_initstructure.gpio_mode = gpio_mode_out_pp; // push the output
Gpio_initstructure.gpio_speed = gpio_speed_2mhz; // The maximum output rate is 2 MHz gpio_init (gpiod, & gpio_initstructure );
}
Void key_init (){
Rcc_apb2periphclockcmd (rcc_apb2periph_gpiod, enable); // enable gpiod clock
Gpio_initstructure.gpio_pin = gpio_pin_13;

Gpio_initstructure.gpio_mode = gpio_mode_ipu; // pull-up input

Gpio_initstructure.gpio_speed = gpio_speed_2mhz; // maximum output rate of 2 MHz gpio_init (gpiod, & gpio_initstructure); // initialize gpiod
}
Int main (){
Led_init (); beep_init (); key_init (); (;;){
If (gpio_readinputdatabit (gpiod, gpio_pin_13) = 0) // press {
Gpio_setbits (gpioa, gpio_pin_4); // set to 1, the light-emitting second-level tube is on gpio_resetbits (gpiod, gpio_pin_3); // reset, Buzzer sound}
Else // The button is not pressed {
Gpio_resetbits (gpioa, gpio_pin_4); // clear, light-emitting second-level tube off gpio_setbits (gpiod, gpio_pin_3); // set it to one with no sound on the buzzer }}
}

Stm32 --- Key Learning