Fast Pin I/O

Classes
struct	GpioPinMap_t

Functions
void	badPinNumber (void) __attribute__((error("Pin number is too large or not a const ant")))
static	__attribute__ ((always_inline)) void badPinCheck(uint8_t pin)
	if (address > reinterpret_cast< uint8_t * >(0X3F))
	if (level)
	if (mode !=OUTPUT)

Variables
static uint8_t	mask
static uint8_t bool	level
	else
static uint8_t	mode
static bool	value
union csd_t	__attribute__

Detailed Description

Fast Digital I/O functions and template class.

Function Documentation

__attribute__()

__attribute__ ( (always_inline) )

inlinestatic

Check for valid pin number

Parameters

[in]

pin

Number of pin to be checked.

DDR register address

Parameters

[in]

pin

Arduino pin number

Returns

register address

Bit mask for pin

Parameters

[in]

pin

Arduino pin number

Returns

mask

PIN register address

Parameters

[in]

pin

Arduino pin number

Returns

register address

PORT register address

Parameters

[in]

pin

Arduino pin number

Returns

register address

Fast write helper.

Parameters

[in]	address	I/O register address
[in]	mask	bit mask for pin
[in]	level	value for bit

Read pin value.

Parameters

[in]

pin

Arduino pin number

Returns

value read

Toggle a pin.

Parameters

[in]

pin

Arduino pin number

If the pin is in output mode toggle the pin level. If the pin is in input mode toggle the state of the 20K pullup.

Set pin value.

Parameters

[in]	pin	Arduino pin number
[in]	level	value to write

Write the DDR register.

Parameters

[in]	pin	Arduino pin number
[in]	level	value to write

Set pin mode.

Parameters

[in]	pin	Arduino pin number
[in]	mode	INPUT, OUTPUT, or INPUT_PULLUP.

The internal pullup resistors will be enabled if mode is INPUT_PULLUP and disabled if the mode is INPUT.

read pin value

Parameters

[in]

pin

Arduino pin number

Returns

value read

Set pin value

Parameters

[in]	pin	Arduino pin number
[in]	level	value to write

badPinNumber()

void badPinNumber

(

void

)

const

generate bad pin number error

if() [1/3]

if	(	address	,
		reinterpret_cast< uint8_t * >	0X3F )

if() [2/3]

if

(

level

)

if() [3/3]

if

(

mode !

= OUTPUT

)

Variable Documentation

__attribute__

__attribute__

inline

DDR register address

Parameters

[in]

pin

Arduino pin number

Returns

register address

Bit mask for pin

Parameters

[in]

pin

Arduino pin number

Returns

mask

PIN register address

Parameters

[in]

pin

Arduino pin number

Returns

register address

PORT register address

Parameters

[in]

pin

Arduino pin number

Returns

register address

Fast write helper.

Parameters

[in]	address	I/O register address
[in]	mask	bit mask for pin
[in]	level	value for bit

Read pin value.

Parameters

[in]

pin

Arduino pin number

Returns

value read

Toggle a pin.

Parameters

[in]

pin

Arduino pin number

If the pin is in output mode toggle the pin level. If the pin is in input mode toggle the state of the 20K pullup.

Set pin value.

Parameters

[in]	pin	Arduino pin number
[in]	level	value to write

Write the DDR register.

Parameters

[in]	pin	Arduino pin number
[in]	level	value to write

Set pin mode.

Parameters

[in]	pin	Arduino pin number
[in]	mode	INPUT, OUTPUT, or INPUT_PULLUP.

The internal pullup resistors will be enabled if mode is INPUT_PULLUP and disabled if the mode is INPUT.

read pin value

Parameters

[in]

pin

Arduino pin number

Returns

value read

Set pin value

Parameters

[in]	pin	Arduino pin number
[in]	level	value to write

else

else

Initial value:

{
        *address &= ~mask

level

bool level

Initial value:

{
    uint8_t s

mask

uint8_t mask

mode

uint8_t mode

Initial value:

{
    fastDdrWrite(pin, mode == OUTPUT)

value

bool value