ST STM32F2 User Manual

UM1940
Overview of HAL drivers
DocID028236 Rev 2
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Table 12: Description of GPIO_InitTypeDef structure
Structure
field
Description
Pin
Specifies the GPIO pins to be configured.
Possible values: GPIO_PIN_x or GPIO_PIN_All, where x[0..15]
Mode
Specifies the operating mode for the selected pins: GPIO mode or EXTI mode.
Possible values are:
GPIO mode
GPIO_MODE_INPUT : Input floating
GPIO_MODE_OUTPUT_PP : Output push-pull
GPIO_MODE_OUTPUT_OD : Output open drain
GPIO_MODE_AF_PP : Alternate function push-pull
GPIO_MODE_AF_OD : Alternate function open drain
GPIO_MODE_ANALOG : Analog mode
External Interrupt mode
GPIO_MODE_IT_RISING : Rising edge trigger detection
GPIO_MODE_IT_FALLING : Falling edge trigger detection
GPIO_MODE_IT_RISING_FALLING : Rising/Falling edge trigger
detection
External Event mode
GPIO_MODE_EVT_RISING : Rising edge trigger detection
GPIO_MODE_EVT_FALLING : Falling edge trigger detection
GPIO_MODE_EVT_RISING_FALLING: Rising/Falling edge trigger
detection
Pull
Specifies the Pull-up or Pull-down activation for the selected pins.
Possible values are:
GPIO_NOPULL
GPIO_PULLUP
GPIO_PULLDOWN
Speed
Specifies the speed for the selected pins
Possible values are:
GPIO_SPEED_LOW
GPIO_SPEED_MEDIUM
GPIO_SPEED_HIGH
Please find below typical GPIO configuration examples:
Configuring GPIOs as output push-pull to drive external LEDs
GPIO_InitStruct.Pin = GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
Configuring PA0 as external interrupt with falling edge sensitivity:
GPIO_InitStructure.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = GPIO_PIN_0;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);

ST STM32F2 Specifications

General

Brand	ST
Model	STM32F2
Category	Microcontrollers
Language	English