mraa Namespace Reference

Data Structures
class	Aio
	API to Analog IO. More...
class	Gpio
	API to General Purpose IO. More...
class	I2c
	API to Inter-Integrated Circuit. More...
class	Pwm
	API to Pulse Width Modulation. More...
class	Spi
	API to Serial Peripheral Interface. More...
class	Uart
	API to UART (enabling only) More...

Enumerations
enum	Mode { MODE_STRONG = 0, MODE_PULLUP = 1, MODE_PULLDOWN = 2, MODE_HIZ = 3 }
enum	Dir { DIR_OUT = 0, DIR_IN = 1, DIR_OUT_HIGH = 2, DIR_OUT_LOW = 3 }
enum	Edge { EDGE_NONE = 0, EDGE_BOTH = 1, EDGE_RISING = 2, EDGE_FALLING = 3 }
enum	Spi_Mode { SPI_MODE0 = 0, SPI_MODE1 = 1, SPI_MODE2 = 2, SPI_MODE3 = 3 }

Functions
std::string	getVersion ()
int	setPriority (const unsigned int priority)
mraa_platform_t	getPlatformType ()
void	printError (mraa_result_t result)
bool	pinModeTest (int pin, mraa_pinmodes_t mode)
unsigned int	adcRawBits ()
unsigned int	adcSupportedBits ()
std::string	getPlatformName ()
unsigned int	getPinCount ()
mraa_result_t	setLogLevel (int level)

Detailed Description

namespace

Enumeration Type Documentation

enum Mode

Gpio Output modes

Enumerator
MODE_STRONG	Default. Strong High and Low
MODE_PULLUP	Interupt on rising & falling
MODE_PULLDOWN	Interupt on rising only
MODE_HIZ	Interupt on falling only

enum Dir

Gpio Direction options

Enumerator
DIR_OUT	Output. A Mode can also be set
DIR_IN	Input
DIR_OUT_HIGH	Output. Init High
DIR_OUT_LOW	Output. Init Low

enum Edge

Gpio Edge types for interupts

Enumerator
EDGE_NONE	No interrupt on Gpio
EDGE_BOTH	Interupt on rising & falling
EDGE_RISING	Interupt on rising only
EDGE_FALLING	Interupt on falling only

enum Spi_Mode

MRAA SPI Modes

Enumerator
SPI_MODE0	CPOL = 0, CPHA = 0, Clock idle low, data is clocked in on rising edge, output data (change) on falling edge
SPI_MODE1	CPOL = 0, CPHA = 1, Clock idle low, data is clocked in on falling edge, output data (change) on rising edge
SPI_MODE2	CPOL = 1, CPHA = 0, Clock idle low, data is clocked in on falling edge, output data (change) on rising edge
SPI_MODE3	CPOL = 1, CPHA = 1, Clock idle low, data is clocked in on rising, edge output data (change) on falling edge

Function Documentation

std::string mraa::getVersion ( )

inline

Get libmraa version.

Returns

libmraa version (e.g. v0.4.0-20-gb408207)

Here is the call graph for this function:

int mraa::setPriority ( const unsigned int  priority )

inline

This function attempts to set the mraa process to a given priority and the scheduler to SCHED_RR. Highest * priority is typically 99 and minimum is 0. This function * will set to MAX if * priority is > MAX. Function will return -1 on failure.

Parameters

priority

Value from typically 0 to 99

Returns

The priority value set

Here is the call graph for this function:

mraa_platform_t mraa::getPlatformType ( )

inline

Get platform type, board must be initialised.

Returns

mraa_platform_t Platform type enum

Here is the call graph for this function:

void mraa::printError ( mraa_result_t  result )

inline

Print a textual representation of the mraa_result_t

Parameters

result

the result to print

Here is the call graph for this function:

bool mraa::pinModeTest ( int  pin, mraa_pinmodes_t  mode  )

inline

Checks if a pin is able to use the passed in mode.

Parameters

pin	Physical Pin to be checked.
mode	the mode to be tested.

Returns

boolean if the mode is supported, 0=false.

Here is the call graph for this function:

unsigned int mraa::adcRawBits ( )

inline

Check the board's bit size when reading the value

Returns

raw bits being read from kernel module. Zero if no ADC

Here is the call graph for this function:

unsigned int mraa::adcSupportedBits ( )

inline

Return value that the raw value should be shifted to. Zero if no ADC

Returns

return actual bit size the adc value should be understood as.

Here is the call graph for this function:

std::string mraa::getPlatformName ( )

inline

Return Platform Name. Returns NULL if no platform inited.

Returns

platform name

Here is the call graph for this function:

unsigned int mraa::getPinCount ( )

inline

Return count of physical pins on the running platform

Returns

uint of physical pins.

Here is the call graph for this function:

mraa_result_t mraa::setLogLevel ( int  level )

inline

Sets the log level to use from 0-7 where 7 is very verbose. These are the syslog log levels, see syslog(3) for more information on the levels.

Parameters

level

Returns

Result of operation

Here is the call graph for this function: