ST STM32F31xx - Page 239

UM1581
General-purpose I/Os (GPIO)
DocID023800 Rev 1
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12.2.6.2 GPIO_ReadInputData
Function Name
uint16_t GPIO_ReadInputData ( GPIO_TypeDef * GPIOx)
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.
Return values
 The input port pin value.
Notes
 None.
12.2.6.3 GPIO_ReadOutputDataBit
Function Name
uint8_t GPIO_ReadOutputDataBit ( GPIO_TypeDef * GPIOx,
uint16_t GPIO_Pin)
Function Description
Reads the specified output data port bit.
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 output 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.
12.2.6.4 GPIO_ReadOutputData
Function Name
uint16_t GPIO_ReadOutputData ( GPIO_TypeDef * GPIOx)
Function Description
Reads the specified GPIO output data port.
Parameters
 GPIOx : where x can be (A, B, C, D, E or F) to select the
GPIO peripheral.