STM32GPIO

GPIO Basic knowledge

STM32 Most owned GPIOA、GPIOB...GPIOG Seven ports , Each port has a maximum of Pin0、Pin1...Pin15 common 16 One pin .

STM32 Each I/O Ports can be freely programmed , but I/O The register must be pressed 32 Bit words are accessed

Two GPIO Output HAL Library function

1）GPIO Electric frequency output HAL Library function

GPIOx: The port number of the target pin

GPIO_Pin： The pin number of the target pin

PinState： High level ---GPIO_PIN_SET, Low level --GPIO_PIN_RESET

for example ： towards PB8 Pin output high level HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8, GPIO_PIN_SET);

2)GPIO Level flip HAL Library function

Output the opposite level according to the current level

for example ：PA3 Output level flip ,HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_3);

GPIO The functions and properties of the port

Normal output （ Push pull output and open floor output ）

Analog input

Reuse output

I/O Interface circuit

To configure STM32cubeMX

To configure SYS as well as RCC

Configure clocks

The generated code , Name the file , And choose MDK-ARM V5

Check the box shown in the above figure , Then you can generate code , To MDK Editor in chief

stay mian Functional USER CODE Editor inside , When it's halfway through development , If you want to redefine the pins , Can return STMcubeMX edit , Instead of deleting all the original code .

Compile successfully