Device driver interface for Microchip MCP23x17 I/O expanders. More...

Detailed Description

Device driver interface for Microchip MCP23x17 I/O expanders.

Definition in file mcp23x17.h.

#include "periph/gpio.h"
#include "periph/i2c.h"
#include "periph/spi.h"
#include "saul/periph.h"
#include "event.h"

Include dependency graph for mcp23x17.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	mcp23x17_i2c_params_t
	MCP23017 I2C parameters. More...

struct	mcp23x17_spi_params_t
	MCP23S17 SPI parameters. More...

struct	mcp23x17_if_params_t
	MCP23x17 Hardware interface parameters union. More...

struct	mcp23x17_params_t
	Struct containing the peripheral configuration. More...

struct	mcp23x17_irq_event_t
	IRQ event type. More...

struct	mcp23x17_t
	Device descriptor for MCP23x17 I/O expanders. More...

struct	mcp23x17_saul_gpio_params_t
	MCP23x17 configuration structure for mapping expander pins to SAUL. More...

Macros
#define	MCP23X17_BASE_ADDR (0x20)
	MCP23x17 device base address. More...

#define	MCP23X17_GPIO_PIN_NUM (16)
	MCP23x17 has 16 I/O pins.

#define	MCP23X17_GPIO_PIN(port, pin) ((gpio_t)((port << 3) \| pin))
	Conversion of (port x : pin y) to a pin number. More...

Enumerations
enum	mcp23x17_error_codes_t { MCP23X17_OK , MCP23X17_ERROR_I2C , MCP23X17_ERROR_SPI , MCP23X17_ERROR_NO_DEV , MCP23X17_ERROR_INV_MODE , MCP23X17_ERROR_INV_FLANK , MCP23X17_ERROR_GPIO , MCP23X17_ERROR_INT_PIN , MCP23X17_ERROR_RESET_PIN }
	Named MCP23x17 driver error codes. More...

enum	mcp23x17_if_t { MCP23X17_I2C , MCP23X17_SPI }
	MCP23x17 interface types. More...

Functions
int	mcp23x17_init (mcp23x17_t dev, const mcp23x17_params_t params)
	Initialize the MCP23x17 I/O expander. More...

int	mcp23x17_gpio_init (mcp23x17_t *dev, gpio_t pin, gpio_mode_t mode)
	Initialize a MCP23x17 pin. More...

int	mcp23x17_gpio_init_int (mcp23x17_t dev, gpio_t pin, gpio_mode_t mode, gpio_flank_t flank, gpio_cb_t isr, void arg)
	Initialize a MCP23x17 pin for external interrupt usage. More...

int	mcp23x17_gpio_read (mcp23x17_t *dev, gpio_t pin)
	Get the value from MCP23x17 input pin. More...

void	mcp23x17_gpio_write (mcp23x17_t *dev, gpio_t pin, int value)
	Write the value to MCP23x17 input pin. More...

void	mcp23x17_gpio_clear (mcp23x17_t *dev, gpio_t pin)
	Clear the MCP23x17 output pin. More...

void	mcp23x17_gpio_set (mcp23x17_t *dev, gpio_t pin)
	Set the MCP23x17 output pin. More...

void	mcp23x17_gpio_toggle (mcp23x17_t *dev, gpio_t pin)
	Toggle the value of the MCP23x17 output pin. More...

void	mcp23x17_gpio_irq_enable (mcp23x17_t *dev, gpio_t pin)
	Enable pin interrupt. More...

void	mcp23x17_gpio_irq_disable (mcp23x17_t *dev, gpio_t pin)
	Disable pin interrupt. More...

Data Structures