Fast Pin I/O

Detailed Description

Fast Digital I/O functions and template class.

Classes
struct	GpioPinMap_t
class	DigitalPin< PinNumber >
	Fast digital port I/O. More...

Macros
#define	GPIO_PIN(reg, bit)   {&PIN##reg, &DDR##reg, &PORT##reg, 1 << bit}
#define	fastPinConfig(pin, mode, level)   {fastPinMode(pin, mode); fastDigitalWrite(pin, level);}

Functions
void	badPinNumber (void) __attribute__((error("Pin number is too large or not a const ant")))
	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

Macro Definition Documentation

fastPinConfig

#define fastPinConfig	(		pin,
			mode,
			level
	)		{fastPinMode(pin, mode); fastDigitalWrite(pin, level);}

set pin configuration

Parameters

[in]	pin	Arduino pin number
[in]	mode	mode INPUT or OUTPUT.
[in]	level	If mode is output, set level high/low. If mode is input, enable or disable the pin's 20K pullup.

Definition at line 310 of file DigitalPin.h.

GPIO_PIN

#define GPIO_PIN	(		reg,
			bit
	)		{&PIN##reg, &DDR##reg, &PORT##reg, 1 << bit}

Initializer macro.

Definition at line 41 of file DigitalPin.h.

Function Documentation

badPinNumber()

void badPinNumber

(

void

)

const

generate bad pin number error

Variable Documentation

__attribute__

static __attribute__

inline

Doxygen will complain without this comment.

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.

Definition at line 65 of file DigitalPin.h.

else

else

Initial value:

{
        *address &= ~mask

Definition at line 120 of file DigitalPin.h.

level

static bool level

Initial value:

{
    uint8_t s

Definition at line 112 of file DigitalPin.h.

mode

uint8_t mode

Initial value:

{
    fastDdrWrite(pin, mode == OUTPUT)

Definition at line 185 of file DigitalPin.h.