NAME
RPi::Const - Constant variables for embedded programming, including the RPi:: family of modules
SYNOPSIS
use RPi::Const (:all);
# or...
use RPi::Const (:pinmode);
# etcDESCRIPTION
This module optionally exports selections or all constant variables used within the RPi::WiringPi suite.
CONSTANT EXPORT TAGS
These are the individual grouping of export tags. The :all tag includes all of the below.
:mode
Setup modes. This is what determines which pin numbering scheme you're using. See wiringPi setup modes for details.
RPI_MODE_WPI => 0, # wiringPi scheme
RPI_MODE_GPIO => 1, # GPIO scheme
RPI_MODE_GPIO_SYS => 2, # GPIO scheme in SYS mode
RPI_MODE_PHYS => 3, # physical pin layout scheme
RPI_MODE_UNINIT => -1, # setup not yet run:pinmode
Pin modes.
INPUT => 0,
OUTPUT => 1,
PWM_OUT => 2,
GPIO_CLOCK => 3,
SOFT_PWM_OUTPUT => 4, # reserved
SOFT_TONE_OUTPUT => 5, # reserved
PWM_TONE_OUTPUT => 6, # reserved:altmode
Pin ALT modes.
ALT0 => 4,
ALT1 => 5,
ALT2 => 6,
ALT3 => 7,
ALT4 => 3,
ALT5 => 2,:pull
Internal pin pull up/down resistor state.
PUD_OFF => 0,
PUD_DOWN => 1,
PUD_UP => 2,:state
HIGH => 1,
LOW => 0,
ON => 1,
OFF => 0,:pwm_mode
The modes the PWM can be set to.
PWM_MODE_MS => 0,
PWM_MODE_BAL => 1,:pwm_defaults
Hardware defaults for PWM settings.
PWM_DEFAULT_MODE => 1, # balanced mode
PWM_DEFAULT_CLOCK => 32,
PWM_DEFAULT_RANGE => 1023:interrupt
Edge detection states for interrupts.
EDGE_SETUP => 0, # reserved
EDGE_FALLING => 1,
EDGE_RISING => 2,
EDGE_BOTH => 3,:mcp23017_registers
Hardware register locations and related info for the MCP23107 GPIO Expander
MCP23017_IODIRA => 0x00,
MCP23017_IODIRB => 0x01,
MCP23017_IPOLA => 0x02,
MCP23017_IPOLB => 0x03,
MCP23017_GPINTENA => 0x04,
MCP23017_GPINTENB => 0x05,
MCP23017_DEFVALA => 0x06,
MCP23017_DEFVALB => 0x07,
MCP23017_INTCONA => 0x08,
MCP23017_INTCONB => 0x09,
MCP23017_IOCONA => 0x0A,
MCP23017_IOCONB => 0x0B,
MCP23017_GPPUA => 0x0C,
MCP23017_GPPUB => 0x0D,
MCP23017_INTFA => 0x0E,
MCP23017_INTFB => 0x0F,
MCP23017_INTCAPA => 0x10,
MCP23017_INTCAPB => 0x11,
MCP23017_GPIOA => 0x12,
MCP23017_GPIOB => 0x13,
MCP23017_OLATA => 0x14,
MCP23017_OLATB => 0x15,
MCP23017_INPUT => 1,
MCP23017_OUTPUT => 0:mcp23017_pins
Named pin numbers for the MCP23017 GPIO Expander. A0-A7 are the bank A pins (0-7) and B0-B7 are the bank B pins (8-15).
A0 => 0, B0 => 8,
A1 => 1, B1 => 9,
A2 => 2, B2 => 10,
A3 => 3, B3 => 11,
A4 => 4, B4 => 12,
A5 => 5, B5 => 13,
A6 => 6, B6 => 14,
A7 => 7, B7 => 15:wpi_pin
The WPIPinType pin-numbering scheme passed to wiringPi's wiringPiSetupPinType() / wiringPiSetupGpioDevice() setup variants. Note that WPI_PIN_PHYS is intentionally not provided - physical-pin setup is not supported within the suite.
WPI_PIN_BCM => 1,
WPI_PIN_WPI => 2,:int_edge
wiringPi-native names for the interrupt edge-detection triggers (these mirror wiringPi's own INT_EDGE_* #defines). Same values as the :interrupt (EDGE_*) tag.
INT_EDGE_SETUP => 0, # reserved
INT_EDGE_FALLING => 1,
INT_EDGE_RISING => 2,
INT_EDGE_BOTH => 3,:wiringpi
Requirements for the wiringPi library itself. WIRINGPI_MIN_VERSION is the canonical minimum wiringPi version for the entire RPi:: distribution family; every distribution that links wiringPi consumes it in its Makefile.PL version check and references it in its documentation (see REQ.md in this distribution's repository for the complete list of consuming files). Note that wiringPi minor versions are integers - 3.8 is older than 3.18 - so compare accordingly.
WIRINGPI_MIN_VERSION => '3.18',AUTHOR
Steve Bertrand, <steveb@cpan.org>
COPYRIGHT AND LICENSE
Copyright (C) 2016-2026 by Steve Bertrand
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.18.2 or, at your option, any later version of Perl 5 you may have available.