Collaboration diagram for Extended GPIO driver:

Modules
	PCAL9535a GPIO driver

	SC16IS7x0 GPIO driver

Data Structures
struct	gpio_ext_state_t

struct	gpio_ext_init_pin_t

struct	gpio_ext_api_t

struct	gpio_ext_t

Typedefs
typedef void(*	gpio_ext_init_t) (const struct gpio_ext_t *GpioExt)
	Virtual function initializes pins of an gpio expander to default values based on DRIVER_PORT_EXT_INIT_TABLE.

typedef uint16_t(*	gpio_ext_inport_t) (const struct gpio_ext_t *GpioExt)
	Virtual function reads from gpio expander port.

typedef void(*	gpio_ext_outport_t) (const struct gpio_ext_t *GpioExt, uint16_t Value)
	Virtual function writes to gpio expander port / pin direction register / pull select register / pull enable register / interrupt enable register / latch enable register.

typedef void(*	gpio_ext_setdrive_t) (const struct gpio_ext_t *GpioExt, uint8_t Values[])
	Virtual function sets drive force to gpio expander pins.

Enumerations

Functions called from application programs
void	GpioExtInit (const struct gpio_ext_t *GpioExt)
	Initialize IO expander driver and chip. More...

static void	GpioExtPortWrite (const struct gpio_ext_t *GpioExt, uint16_t Value, uint16_t Mask)
	Write 16-bits data to the GPIO port. More...

static void	GpioExtPortSet (const struct gpio_ext_t *GpioExt, uint16_t Mask)
	Set bits by mask in the GPIO port. More...

static void	GpioExtPortClear (const struct gpio_ext_t *GpioExt, uint16_t Mask)
	Clear bits by mask in the GPIO port. More...

static void	GpioExtPortToggle (const struct gpio_ext_t *GpioExt, uint16_t Mask)
	Invert bits by mask in the GPIO port. More...

static void	GpioExtPinWrite (const struct gpio_ext_t *GpioExt, uint16_t Pin, uint16_t Value)
	Set/clear 1 pin in the GPIO port. More...

static void	GpioExtPinSet (const struct gpio_ext_t *GpioExt, uint16_t Pin)
	Set 1 pin in the GPIO port. More...

static void	GpioExtPinClear (const struct gpio_ext_t *GpioExt, uint16_t Pin)
	Clear 1 pin in the GPIO port. More...

static void	GpioExtPinToggle (const struct gpio_ext_t *GpioExt, uint16_t Pin)
	Invert 1 pin in the GPIO port. More...

static uint16_t	GpioExtPortRead (const struct gpio_ext_t *GpioExt)
	Read all the pins from the GPIO port. More...

static uint8_t	GpioExtPinRead (const struct gpio_ext_t *GpioExt, uint16_t Pin)
	Read a pin value from the GPIO port. More...

void	GpioExtPortSetup (const struct gpio_ext_t *GpioExt, uint16_t Direction, uint16_t PullSelect, uint16_t PullEnable, uint16_t Mask)
	Set IO expander ports to input or output. More...

static uint16_t	GpioExtInterruptsClear (const struct gpio_ext_t *GpioExt, uint16_t Mask)

static uint16_t	GpioExtInterruptsRead (const struct gpio_ext_t *GpioExt)

static void	GpioExtInterruptsEnable (const struct gpio_ext_t *GpioExt, uint16_t Mask)

static void	GpioExtInterruptsDisable (const struct gpio_ext_t *GpioExt, uint16_t Mask)

static void	GpioExtSetDrive (const struct gpio_ext_t *GpioExt, uint8_t Values[])

static void	GpioExtSetLatch (const struct gpio_ext_t *GpioExt, uint16_t Mask)

static uint8_t	GpioExtCheckStatus (const struct gpio_ext_t *GpioExt)
	Check status of GpioExt operations and reset status to GPIO_EXT_STATUS_OK. More...

Detailed Description

Enumeration Type Documentation

enum gpio_ext_status_t

GPIO driver SPI/I2C bus operation statuse

Enumerator
GPIO_EXT_STATUS_OK	Operation completed successfully.
GPIO_EXT_STATUS_COMM_ERROR	SPI/I2C bus error.

Definition at line 72 of file gpio-ext.h.

enum gpio_ext_pin_dir_t

Pin direction setting

Enumerator
DIR_UNCHANGED	Do not touch pin direction setting (leave as is)
DIR_IN	Set pin as input.
DIR_OUT	Set pin as output.

Definition at line 81 of file gpio-ext.h.

enum gpio_ext_pin_pull_t

Pin pullup / pulldown setting

Enumerator
PULL_UNCHANGED	Do not touch pin pullup / pulldown setting (leave as is)
PULL_NONE	Disconnect pin pullup / pulldown.
PULL_UP	Pullup the pin.
PULL_DOWN	Pulldown the pin.

Definition at line 91 of file gpio-ext.h.

Function Documentation

void GpioExtInit ( const struct gpio_ext_t * GpioExt )

Initialize IO expander driver and chip.

Parameters

GpioExt Parameters for the IO port expander to be used

static void GpioExtPortWrite	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Value,
		uint16_t	Mask
	)

inlinestatic

Write 16-bits data to the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Value	Data to be written to IO expander ports
Mask	Mask of pins in the port to be written

Definition at line 213 of file gpio-ext.h.

References gpio_ext_t::Func, gpio_ext_api_t::GpioExtOutPort, gpio_ext_state_t::OutputValues, and gpio_ext_t::State.

Referenced by GpioExtPortClear(), and GpioExtPortSet().

static void GpioExtPortSet	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Mask
	)

inlinestatic

Set bits by mask in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Mask	Mask of pins in the port to be written

Definition at line 227 of file gpio-ext.h.

References GpioExtPortWrite().

static void GpioExtPortClear	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Mask
	)

inlinestatic

Clear bits by mask in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Mask	Mask of pins in the port to be written

Definition at line 238 of file gpio-ext.h.

References GpioExtPortWrite().

static void GpioExtPortToggle	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Mask
	)

inlinestatic

Invert bits by mask in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Mask	Mask of pins in the port to be written

Definition at line 249 of file gpio-ext.h.

References atomic_xor16(), gpio_ext_t::Func, gpio_ext_api_t::GpioExtOutPort, gpio_ext_state_t::OutputValues, and gpio_ext_t::State.

static void GpioExtPinWrite	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Pin,
		uint16_t	Value
	)

inlinestatic

Set/clear 1 pin in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Pin	Pin number to set/clear
Value	0 clears the pin, any other value sets it to 1

Definition at line 263 of file gpio-ext.h.

References gpio_ext_t::Func, gpio_ext_api_t::GpioExtOutPort, gpio_ext_state_t::OutputValues, and gpio_ext_t::State.

static void GpioExtPinSet	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Pin
	)

inlinestatic

Set 1 pin in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Pin	Pin number to set

Definition at line 277 of file gpio-ext.h.

References gpio_ext_t::Func, gpio_ext_api_t::GpioExtOutPort, gpio_ext_state_t::OutputValues, and gpio_ext_t::State.

static void GpioExtPinClear	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Pin
	)

inlinestatic

Clear 1 pin in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Pin	Pin number to clear

Definition at line 290 of file gpio-ext.h.

References gpio_ext_t::Func, gpio_ext_api_t::GpioExtOutPort, gpio_ext_state_t::OutputValues, and gpio_ext_t::State.

static void GpioExtPinToggle	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Pin
	)

inlinestatic

Invert 1 pin in the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Pin	Pin number to toggle

Definition at line 303 of file gpio-ext.h.

References atomic_xor16(), gpio_ext_t::Func, gpio_ext_api_t::GpioExtOutPort, gpio_ext_state_t::OutputValues, and gpio_ext_t::State.

static uint16_t GpioExtPortRead ( const struct gpio_ext_t * GpioExt )

inlinestatic

Read all the pins from the GPIO port.

Parameters

GpioExt Parameters for the IO port expander to be used

Returns: Port value

Definition at line 317 of file gpio-ext.h.

Referenced by GpioExtPinRead().

static uint8_t GpioExtPinRead	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Pin
	)

inlinestatic

Read a pin value from the GPIO port.

Parameters

GpioExt	Parameters for the IO port expander to be used
Pin	Global pin number to be read

Returns: Pin value

Definition at line 329 of file gpio-ext.h.

References gpio_ext_state_t::Direction, gpio_ext_t::Func, GpioExtPortRead(), GpioExtPortSetup(), gpio_ext_api_t::GpioExtSetDrive, gpio_ext_api_t::GpioExtSetInterrupts, gpio_ext_api_t::GpioExtSetLatch, gpio_ext_state_t::InterruptMask, gpio_ext_state_t::InterruptStatus, IrqTriggerExternal(), gpio_ext_state_t::PullEnable, gpio_ext_state_t::PullSelect, and gpio_ext_t::State.

void GpioExtPortSetup	(	const struct gpio_ext_t *	GpioExt,
		uint16_t	Direction,
		uint16_t	PullSelect,
		uint16_t	PullEnable,
		uint16_t	Mask
	)

Set IO expander ports to input or output.

Parameters

GpioExt	Parameters for the IO port expander to be used
Direction	0 = input, 1 = output
PullSelect	0 = pulldown, 1 = pullup
PullEnable	0 = no pull, 1 = pullup/pulldown
Mask	Mask of pins in the port to be changed

Referenced by GpioExtPinRead().

static uint8_t GpioExtCheckStatus ( const struct gpio_ext_t * GpioExt )

inlinestatic

Check status of GpioExt operations and reset status to GPIO_EXT_STATUS_OK.

Parameters

GpioExt Parameters for the IO port expander to be used

Returns: GPIO_EXT_STATUS_OK if there were no errors since the last check, errorcode otherwise.

Definition at line 401 of file gpio-ext.h.

References GPIO_EXT_STATUS_OK, and gpio_ext_t::State.

Modules

Data Structures

Typedefs

Enumerations

Functions called from application programs

Detailed Description

Enumeration Type Documentation

Function Documentation