STM32F4 GPIO API¶

group STM32F4_HAL_GPIO

Defines

K_NUM_PINS (16 * 5)¶: Number of available GPIO pins.

K_LED_GREEN K_LED_0 ¶: Green led pin.

K_LED_0 YOTTA_CFG_HARDWARE_PINS_LED1¶: Led 0 pin.

K_LED_ORANGE K_LED_1 ¶: Orange led pin.

K_LED_1 YOTTA_CFG_HARDWARE_PINS_LED2¶: Led 1 pin.

K_LED_RED K_LED_2 ¶: Red led pin.

K_LED_2 YOTTA_CFG_HARDWARE_PINS_LED3¶: Led 2 pin.

K_LED_BLUE K_LED_3 ¶: Blue led pin.

K_LED_3 YOTTA_CFG_HARDWARE_PINS_LED4¶: Led 3 pin.

K_LED_COUNT 4¶: Number of available leds.

K_BUTTON_0 YOTTA_CFG_HARDWARE_PINS_USER_BUTTON¶: User button pin.

STM32F4_PIN_OFFSET(p) ((p) % 16)¶: Derives GPIO pin offset (within respective port)

STM32F4_PIN_MASK(p) (1 << STM32F4_PIN_OFFSET(p))¶: Derives bit mask for GPIO pin.

STM32F4_PIN_GPIO(p) ((GPIO_TypeDef *) (GPIOA_BASE + (((p) / 16) * 0x400)))¶: Derives GPIO port from pin number.

STM32F4_PIN_AHB1ENR_BIT(p) (1 << ((p) / 16))¶: Derives AHB (hardware clock) bit from pin number.

CHECK_BIT(src, bit) (READ_BIT((src), (bit)) == (bit))¶: Checks if bit value in src is set.

CHECK_SET_BIT(dest, bit) do { \ uint32_t tmpreg = READ_BIT(dest, bit); \ if (!tmpreg) { \ SET_BIT(dest, bit); \ /* Delay after an RCC peripheral clock enabling */ \ tmpreg = READ_BIT(dest, bit);\ } \ } while(0)¶: Checks until bit value in dest is set.

Enums

enum KPin¶

All available GPIO pins for STM32F4.

Values:

PA0 = 0¶

PA1¶

PA2¶

PA3¶

PA4¶

PA5¶

PA6¶

PA7¶

PA8¶

PA9¶

PA10¶

PA11¶

PA12¶

PA13¶

PA14¶

PA15¶

PB0¶

PB1¶

PB2¶

PB3¶

PB4¶

PB5¶

PB6¶

PB7¶

PB8¶

PB9¶

PB10¶

PB11¶

PB12¶

PB13¶

PB14¶

PB15¶

PC0¶

PC1¶

PC2¶

PC3¶

PC4¶

PC5¶

PC6¶

PC7¶

PC8¶

PC9¶

PC10¶

PC11¶

PC12¶

PC13¶

PC14¶

PC15¶

PD0¶

PD1¶

PD2¶

PD3¶

PD4¶

PD5¶

PD6¶

PD7¶

PD8¶

PD9¶

PD10¶

PD11¶

PD12¶

PD13¶

PD14¶

PD15¶

PE0¶

PE1¶

PE2¶

PE3¶

PE4¶

PE5¶

PE6¶

PE7¶

PE8¶

PE9¶

PE10¶

PE11¶

PE12¶

PE13¶

PE14¶

PE15¶

Functions

void kprv_gpio_alt_config(GPIO_TypeDef *GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF)¶

Performs alternate GPIO configuration.

Parameters

GPIOx: STM32CubeF4 GPIO definition
GPIO_PinSource: pin port number
GPIO_AF: alternate pin number

void k_gpio_init(int pin, KGPIOMode mode, KGPIOPullup pullup)¶

Performs low-level GPIO pin configuration and setup.

Parameters

pin: GPIO pin number
mode: pin mode
pullup: pin pullup setting

unsigned int k_gpio_read(int pin)¶

Reads value off GPIO pin.

Return

int value read from pin

Parameters

pin: GPIO pin to read from

void k_gpio_write(int pin, unsigned int val)¶

Writes value to GPIO pin.

Parameters

pin: GPIO pin to write to
val: value to write to pin

struct KPinDesc¶

#include <pins.h>

Structure describing GPIO pin.

Public Members

GPIO_TypeDef *gpio¶: GPIO structure from STM32CubeF4 interface.

uint16_t pin¶: Pin number.

uint32_t ahb1enr_bit¶: AHB bit setting.