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# pigpio # pigpio
pigpio is a C library for the Raspberry which allows control of the pigpio is a C library for the Raspberry which allows control of the
general purpose input outputs (gpios). General Purpose Input Outputs (GPIO).
Features Features
sampling and time-stamping of gpios 0-31 between 100,000 and 1,000,000 times per second. sampling and time-stamping of GPIO 0-31 between 100,000 and 1,000,000 times per second.
provision of PWM on any number of the user gpios simultaneously. provision of PWM on any number of the user GPIO simultaneously.
provision of servo pulses on any number of the user gpios simultaneously. provision of servo pulses on any number of the user GPIO simultaneously.
callbacks when any of gpios 0-31 change state (callbacks receive the time of the event callbacks when any of GPIO 0-31 change state (callbacks receive the time of the event
accurate to a few microseconds). accurate to a few microseconds).
notifications via pipe when any of gpios 0-31 change state. notifications via pipe when any of GPIO 0-31 change state.
callbacks at timed intervals. callbacks at timed intervals.
reading/writing all of the gpios in a bank (0-31, 32-53) as a single operation. reading/writing all of the GPIO in a bank (0-31, 32-53) as a single operation.
individually setting gpio modes, reading and writing. individually setting GPIO modes, reading and writing.
socket and pipe interfaces for the bulk of the functionality in addition to the socket and pipe interfaces for the bulk of the functionality in addition to the
underlying C library calls. underlying C library calls.
the construction of arbitrary waveforms to give precise timing of output gpio the construction of arbitrary waveforms to give precise timing of output GPIO
level changes (accurate to a few microseconds). level changes (accurate to a few microseconds).
software serial links using any user gpio. software serial links, I2C, and SPI using any user GPIO.
rudimentary permission control through the socket and pipe interfaces so users rudimentary permission control through the socket and pipe interfaces so users
can be prevented from "updating" inappropriate gpios. can be prevented from "updating" inappropriate GPIO.
creating and running scripts on the pigpio daemon. creating and running scripts on the pigpio daemon.
@ -50,7 +50,11 @@ A number of utility programs are provided
the pigpiod daemon. the pigpiod daemon.
the Python module. the Python module.
the piscope digital waveform viewer
Examples
See http://abyz.co.uk/rpi/pigpio/examples.html
the pigs command line utility. the pigs command line utility.
the pig2vcd utility which converts notifications into the value change dump (VCD) the pig2vcd utility which converts notifications into the value change dump (VCD)