uext.h File Reference

#include <stdint.h>
#include <neo6502.h>

Include dependency graph for uext.h:

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

Go to the source code of this file.

Typedefs
typedef enum neo_uext_direction	neo_uext_direction_t

Enumerations
enum	neo_uext_direction { NEO_UEXT_INPUT = 1, NEO_UEXT_OUTPUT = 2, NEO_UEXT_ANALOGUE_INPUT = 3 }

Functions
void	neo_uext_init (void)
	Initialise the UExt I/O system. More...
void	neo_uext_gpio_write (uint8_t pin, uint8_t value)
	Write the specified value to the output latch for the specified UEXT pin. More...
uint8_t	neo_uext_gpio_read (uint8_t pin)
	Reads the value on the specified UEXT pin. More...
void	neo_uext_gpio_set_direction (uint8_t pin, uint8_t direction)
	Set the direction of the specified UEXT pin. More...
void	neo_uext_i2c_write (uint8_t device, uint8_t reg, uint8_t value)
	Write to an I2C device. More...
uint8_t	neo_uext_i2c_read (uint8_t device, uint8_t reg)
	Read from an I2C device. More...
uint16_t	neo_uext_analogue_read (uint8_t pin)
	Read from an analogue input pin. More...
uint8_t	neo_uext_i2c_status (uint8_t device)
	Query the I2C device status. More...
void	neo_uext_i2c_block_read (uint8_t device, void *dest, uint16_t len)
	Read a block from an I2C device. More...
void	neo_uext_i2c_block_write (uint8_t device, const void *src, uint16_t len)
	Write a block to an I2C device. More...
void	neo_uext_spi_block_read (uint8_t device, void *dest, uint16_t len)
	Read a block from an SPI device. More...
void	neo_uext_spi_block_write (uint8_t device, const void *src, uint16_t len)
	Write a block to an SPI device. More...

Typedef Documentation

neo_uext_direction_t

typedef enum neo_uext_direction neo_uext_direction_t

Enumeration Type Documentation

neo_uext_direction

enum neo_uext_direction

Enumerator
NEO_UEXT_INPUT
NEO_UEXT_OUTPUT
NEO_UEXT_ANALOGUE_INPUT

Function Documentation

neo_uext_analogue_read()

uint16_t neo_uext_analogue_read

(

uint8_t

pin

)

Read from an analogue input pin.

Check errors with

See also

neo_api_error

neo_uext_gpio_read()

uint8_t neo_uext_gpio_read

(

uint8_t

pin

)

Reads the value on the specified UEXT pin.

If the pin is set to input, this will read the level on the pin. If the pin is set to output, this will read the value set on the output latch.

See also

neo_uext_gpio_write

Check errors with

See also

neo_api_error

neo_uext_gpio_set_direction()

void neo_uext_gpio_set_direction	(	uint8_t	pin,
		uint8_t	direction
	)

Set the direction of the specified UEXT pin.

See also

neo_uext_direction_t

Check errors with

See also

neo_api_error

neo_uext_gpio_write()

void neo_uext_gpio_write	(	uint8_t	pin,
		uint8_t	value
	)

Write the specified value to the output latch for the specified UEXT pin.

This will only be output if the pin is enabled and its direction set to output.

Check errors with

See also

neo_api_error

neo_uext_i2c_block_read()

void neo_uext_i2c_block_read	(	uint8_t	device,
		void *	dest,
		uint16_t	len
	)

Read a block from an I2C device.

Check errors with

See also

neo_api_error

neo_uext_i2c_block_write()

void neo_uext_i2c_block_write	(	uint8_t	device,
		const void *	src,
		uint16_t	len
	)

Write a block to an I2C device.

Check errors with

See also

neo_api_error

neo_uext_i2c_read()

uint8_t neo_uext_i2c_read	(	uint8_t	device,
		uint8_t	reg
	)

Read from an I2C device.

Check errors with

See also

neo_api_error

neo_uext_i2c_status()

uint8_t neo_uext_i2c_status

(

uint8_t

device

)

Query the I2C device status.

Check errors with

See also

neo_api_error

Returns

Non-zero if present.

neo_uext_i2c_write()

void neo_uext_i2c_write	(	uint8_t	device,
		uint8_t	reg,
		uint8_t	value
	)

Write to an I2C device.

Check errors with

See also

neo_api_error

neo_uext_init()

void neo_uext_init

(

void

)

Initialise the UExt I/O system.

Set all UEXT pins to I/O pins, inputs and enabled.

neo_uext_spi_block_read()

void neo_uext_spi_block_read	(	uint8_t	device,
		void *	dest,
		uint16_t	len
	)

Read a block from an SPI device.

Check errors with

See also

neo_api_error

neo_uext_spi_block_write()

void neo_uext_spi_block_write	(	uint8_t	device,
		const void *	src,
		uint16_t	len
	)

Write a block to an SPI device.

Check errors with

See also

neo_api_error