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This module exports useful constants to make your code easier to create and maintain.
Constants can be imported using
use HiPi::Constant qw( :tagname :tagname2 :tagname3 );
tag :raspberry
# for setting pin levels
RPI_HIGH
RPI_LOW
# set to 1 or 2 according to
# 1 for Model B Revision 1 boards
# 2 for anything else
RPI_BOARD_REVISION
# GPIO Pad pin numbers for passing anywhere a function
# or method expects a BCM GPIO Pin identifier
# See: Raspberry Pi Pin Layout
RPI_PAD1_PIN_3
RPI_PAD1_PIN_5
RPI_PAD1_PIN_7
RPI_PAD1_PIN_8
RPI_PAD1_PIN_10
RPI_PAD1_PIN_11
RPI_PAD1_PIN_12
RPI_PAD1_PIN_13
RPI_PAD1_PIN_15
RPI_PAD1_PIN_16
RPI_PAD1_PIN_18
RPI_PAD1_PIN_19
RPI_PAD1_PIN_21
RPI_PAD1_PIN_22
RPI_PAD1_PIN_23
RPI_PAD1_PIN_24
RPI_PAD1_PIN_26
RPI_PAD5_PIN_3
RPI_PAD5_PIN_4
RPI_PAD5_PIN_5
RPI_PAD5_PIN_6
# mask values for use with classes derived from
# HiPi::Pin
RPI_INT_NONE
RPI_INT_FALL
RPI_INT_RISE
RPI_INT_BOTH
RPI_INT_AFALL
RPI_INT_ARISE
RPI_INT_HIGH
RPI_INT_LOW
# function values for use with classes derived from
# HiPi::Pin
RPI_PINMODE_INPT
RPI_PINMODE_OUTP
RPI_PINMODE_ALT0
RPI_PINMODE_ALT1
RPI_PINMODE_ALT2
RPI_PINMODE_ALT3
RPI_PINMODE_ALT4
RPI_PINMODE_ALT5
# Pull Up / Down setting
RPI_PUD_NULL
RPI_PUD_OFF
RPI_PUD_DOWN
RPI_PUD_UP
tag :i2c
# GPIO pin identifiers using i2c pin names
I2C0_SDA
I2C0_SCL
I2C1_SDA
I2C1_SCL
tag :serial
# GPIO pin identifiers using UART names
UART0_TXD
UART0_RXD
UART0_RTS
UART0_CTS
UART1_TXD
UART1_RXD
UART1_RTS
UART1_CTS
tag :spi
# GPIO pin identifiers using SPI names
SPI0_MOSI
SPI0_MISO
SPI0_CLK
SPI0_CE0_N
SPI0_CE1_N
tag :gpclock
# GPIO pin identifiers using gpclock pin names.
GPCLK0
GPCLK1
tag :pwm
# GPIO pin identifiers using PWM pin name.
PWM0