ST STM32F31xx User Manual

General-purpose I/Os (GPIO)
UM1581
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DocID023800 Rev 1
Function Description
Fills each GPIO_InitStruct member with its default value.
Parameters
 GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure
which will be initialized.
Return values
 None.
Notes
 None.
12.2.5.4 GPIO_PinLockConfig
Function Name
void GPIO_PinLockConfig ( GPIO_TypeDef * GPIOx, uint16_t
GPIO_Pin)
Function Description
Locks GPIO Pins configuration registers.
Parameters
 GPIOx : where x can be (A or B or D) to select the GPIO
peripheral.
 GPIO_Pin : specifies the port bit to be written. This
parameter can be any combination of GPIO_Pin_x where x
can be (0..15).
Return values
 None.
Notes
 The configuration of the locked GPIO pins can no longer be
modified until the next reset.
12.2.6 GPIO Read and Write functions
12.2.6.1 GPIO_ReadInputDataBit
Function Name
uint8_t GPIO_ReadInputDataBit ( GPIO_TypeDef * GPIOx,
uint16_t GPIO_Pin)
Function Description
Reads the specified input port pin.
Parameters
 GPIOx : where x can be (A, B, C, D, E or F) to select the
GPIO peripheral.
 GPIO_Pin : specifies the port bit to read.
Return values
 The input port pin value.
Notes
 This parameter can be GPIO_Pin_x where x can be : (0..15)
for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE; (0..2, 4, 6,
9..10) for GPIOF.

ST STM32F31xx Specifications

General

Brand	ST
Model	STM32F31xx
Category	Microcontrollers
Language	English