GPIO - General Purpose Input/Output#

GPIO_Port_TypeDef#

GPIO_Port_TypeDef

GPIO ports IDs.

GPIO_DriveStrength_TypeDef#

GPIO_DriveStrength_TypeDef

GPIO drive strength.

GPIO_Mode_TypeDef#

GPIO_Mode_TypeDef

Pin mode.

For more details on each mode, refer to the reference manual.

GPIO_DbgLocationSet#

void GPIO_DbgLocationSet (unsigned int location)

Sets the pin location of the debug pins (Serial Wire interface).

Note

• Changing the pins used for debugging uncontrolled, may result in a lockout.

GPIO_DriveStrengthSet#

void GPIO_DriveStrengthSet (GPIO_Port_TypeDef port, GPIO_DriveStrength_TypeDef strength)

Sets the drive strength for a GPIO port.

GPIO_ExtIntConfig#

void GPIO_ExtIntConfig (GPIO_Port_TypeDef port, unsigned int pin, unsigned int intNo, bool risingEdge, bool fallingEdge, bool enable)

Configure the GPIO external pin interrupt.

It is recommended to disable interrupts before configuring the GPIO pin interrupt. See GPIO_IntDisable() for more information.

The GPIO interrupt handler must be in place before enabling the interrupt.

Notice that any pending interrupt for the selected interrupt is cleared by this function.

Note

• On series 0 devices, the pin number parameter is not used. The pin number used on these devices is hardwired to the interrupt with the same number.
  On series 1 devices, the pin number can be selected freely within a group. Interrupt numbers are divided into 4 groups (intNo / 4) and valid pin number within the interrupt groups are: 0: pins 0-3 (interrupt number 0-3) 1: pins 4-7 (interrupt number 4-7) 2: pins 8-11 (interrupt number 8-11) 3: pins 12-15 (interrupt number 12-15)

GPIO_EM4WUExtIntConfig#

void GPIO_EM4WUExtIntConfig (GPIO_Port_TypeDef port, unsigned int pin, uint32_t intNo, bool polarity, bool enable)

Configure EM4WU pins as external level-sensitive interrupts.

It is recommended to disable interrupts before configuring the GPIO pin interrupt. See GPIO_IntDisable() for more information.

The GPIO interrupt handler must be in place before enabling the interrupt.

Notice that any pending interrupt for the selected interrupt is cleared by this function.

Note

• The selected port/pin must be mapped to an existant EM4WU interrupt. Each EM4WU signal is connected to a fixed pin. Refer to the Alternate Function Table in the device Datasheet for the location of each EM4WU signal. For example, on xG22 device, the interrupt of EM4WU6 is fixed to pin PC00.

GPIO_PinModeSet#

void GPIO_PinModeSet (GPIO_Port_TypeDef port, unsigned int pin, GPIO_Mode_TypeDef mode, unsigned int out)

Set the mode for a GPIO pin.

GPIO_PinModeGet#

GPIO_Mode_TypeDef GPIO_PinModeGet (GPIO_Port_TypeDef port, unsigned int pin)

Get the mode for a GPIO pin.

Returns

• The pin mode.

GPIO_EM4EnablePinWakeup#

void GPIO_EM4EnablePinWakeup (uint32_t pinmask, uint32_t polaritymask)

Enable GPIO pin wake-up from EM4.

When the function exits, EM4 mode can be safely entered.

Note

• It is assumed that the GPIO pin modes are set correctly. Valid modes are gpioModeInput and gpioModeInputPull.

GPIO_DbgSWDClkEnable#

void GPIO_DbgSWDClkEnable (bool enable)

Enable/disable serial wire clock pin.

Note

• Disabling SWDClk will disable the debug interface, which may result in a lockout if done early in startup (before debugger is able to halt core).

GPIO_DbgSWDIOEnable#

void GPIO_DbgSWDIOEnable (bool enable)

Enable/disable serial wire data I/O pin.

Note

• Disabling SWDClk will disable the debug interface, which may result in a lockout if done early in startup (before debugger is able to halt core).

GPIO_DbgSWOEnable#

void GPIO_DbgSWOEnable (bool enable)

Enable/Disable serial wire output pin.

Note

• Enabling this pin is not sufficient to fully enable serial wire output, which is also dependent on issues outside the GPIO module. Refer to DBG_SWOEnable().

Warnings

• If debug port is locked, SWO pin is not disabled automatically. To avoid information leakage through SWO, disable SWO pin after locking debug port.

GPIO_EM4DisablePinWakeup#

void GPIO_EM4DisablePinWakeup (uint32_t pinmask)

Disable GPIO pin wake-up from EM4.

GPIO_EM4GetPinWakeupCause#

uint32_t GPIO_EM4GetPinWakeupCause (void )

Check which GPIO pin(s) that caused a wake-up from EM4.

Returns

• Bit mask containing the bitwise logic OR of which GPIO pin(s) caused the wake-up. Refer to Reference Manuals for pinmask to GPIO port/pin mapping.

GPIO_EM4SetPinRetention#

void GPIO_EM4SetPinRetention (bool enable)

Enable GPIO pin retention of output enable, output value, pull enable, and pull direction in EM4.

Note

• On series 0 devices EM4 gpio retention can either be turned on or off. On series 1 devices there are three EM4 GPIO retention modes available. These modes are "Disabled", "EM4EXIT" and "SWUNLATCH". Use the EMU_EM4Init() to configure the GPIO retention mode on a series 1 device.

The behavior of this function depends on the configured GPIO retention mode. If the GPIO retention mode is configured to be "SWUNLATCH" then this function will not change anything. If the retention mode is anything else then this function will set the GPIO retention mode to "EM4EXIT" when the enable argument is true, and "Disabled" when false.

GPIO_InputSenseSet#

void GPIO_InputSenseSet (uint32_t val, uint32_t mask)

Enable/disable input sensing.

Disabling input sensing if not used, can save some energy consumption.

GPIO_IntClear#

void GPIO_IntClear (uint32_t flags)

Clear one or more pending GPIO interrupts.

GPIO_IntDisable#

void GPIO_IntDisable (uint32_t flags)

Disable one or more GPIO interrupts.

GPIO_IntEnable#

void GPIO_IntEnable (uint32_t flags)

Enable one or more GPIO interrupts.

Note

• Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. To ignore a pending interrupt, consider using GPIO_IntClear() prior to enabling the interrupt.

GPIO_EnabledIntGet#

uint32_t GPIO_EnabledIntGet (void )

Get enabled GPIO interrupts.

Returns

• Enabled GPIO interrupt sources.

GPIO_IntGet#

uint32_t GPIO_IntGet (void )

Get pending GPIO interrupts.

Returns

• GPIO interrupt sources pending.

GPIO_IntGetEnabled#

uint32_t GPIO_IntGetEnabled (void )

Get enabled and pending GPIO interrupt flags.

Useful for handling more interrupt sources in the same interrupt handler.

Note

• Interrupt flags are not cleared by the use of this function.

Returns

• Pending and enabled GPIO interrupt sources. The return value is the bitwise AND combination of

  • the OR combination of enabled interrupt sources in GPIO_IEN register and

  • the OR combination of valid interrupt flags in GPIO_IF register.

GPIO_IntSet#

void GPIO_IntSet (uint32_t flags)

Set one or more pending GPIO interrupts from SW.

GPIO_Lock#

void GPIO_Lock (void )

Lock the GPIO configuration.

GPIO_PinInGet#

unsigned int GPIO_PinInGet (GPIO_Port_TypeDef port, unsigned int pin)

Read the pad value for a single pin in a GPIO port.

Returns

• The pin value, 0 or 1.

GPIO_PinLock#

void GPIO_PinLock (GPIO_Port_TypeDef port, unsigned int pin)

Lock all GPIO configuration settings for a given pin.

The lock can only be cleared by a chip reset.

GPIO_PinOutClear#

void GPIO_PinOutClear (GPIO_Port_TypeDef port, unsigned int pin)

Set a single pin in GPIO data out port register to 0.

Note

• To ensure that the setting takes effect on the output pad, the pin must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_PinOutGet#

unsigned int GPIO_PinOutGet (GPIO_Port_TypeDef port, unsigned int pin)

Get current setting for a pin in a GPIO port data out register.

Returns

• The DOUT setting for the requested pin, 0 or 1.

GPIO_PinOutSet#

void GPIO_PinOutSet (GPIO_Port_TypeDef port, unsigned int pin)

Set a single pin in GPIO data out register to 1.

Note

• To ensure that the setting takes effect on the output pad, the pin must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_PinOutToggle#

void GPIO_PinOutToggle (GPIO_Port_TypeDef port, unsigned int pin)

Toggle a single pin in GPIO port data out register.

Note

• To ensure that the setting takes effect on the output pad, the pin must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_PortInGet#

uint32_t GPIO_PortInGet (GPIO_Port_TypeDef port)

Read the pad values for GPIO port.

Returns

• The pad values for the GPIO port.

GPIO_PortOutClear#

void GPIO_PortOutClear (GPIO_Port_TypeDef port, uint32_t pins)

Set bits in DOUT register for a port to 0.

Note

• To ensure that the setting takes effect on the output pad, the pin must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_PortOutGet#

uint32_t GPIO_PortOutGet (GPIO_Port_TypeDef port)

Get the current setting for a GPIO port data out register.

Returns

• The data out setting for the requested port.

GPIO_PortOutSet#

void GPIO_PortOutSet (GPIO_Port_TypeDef port, uint32_t pins)

Set bits GPIO data out register to 1.

Note

• To ensure that the setting takes effect on the respective output pads, the pins must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_PortOutSetVal#

void GPIO_PortOutSetVal (GPIO_Port_TypeDef port, uint32_t val, uint32_t mask)

Set GPIO port data out register.

Note

• To ensure that the setting takes effect on the respective output pads, the pins must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_PortOutToggle#

void GPIO_PortOutToggle (GPIO_Port_TypeDef port, uint32_t pins)

Toggle pins in GPIO port data out register.

Note

• To ensure that the setting takes effect on the output pad, the pin must be configured properly. If not, it will take effect whenever the pin has been properly configured.

GPIO_SlewrateSet#

void GPIO_SlewrateSet (GPIO_Port_TypeDef port, uint32_t slewrate, uint32_t slewrateAlt)

Set slewrate for pins on a GPIO port.

GPIO_Unlock#

void GPIO_Unlock (void )

Unlock the GPIO configuration.