mirror of https://github.com/joan2937/pigpio
259 lines
3.8 KiB
Groff
259 lines
3.8 KiB
Groff
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." Process this file with
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." groff -man -Tascii pigpiod.1
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."
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.TH pigpiod 1 2012-2015 Linux "pigpio archive"
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.SH NAME
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pigpiod - A utility to start the pigpio library as a daemon.
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.SH SYNOPSIS
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sudo pigpiod [OPTION]...
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.SH DESCRIPTION
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.ad l
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.nh
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pigpiod is a utility which launches the pigpio library as a daemon.
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.br
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.br
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Once launched the pigpio library runs in the background accepting commands from the pipe and socket interfaces.
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.br
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.br
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The pigpiod utility requires sudo privileges to launch the library but thereafter the pipe and socket commands may be issued by normal users.
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.br
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.br
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pigpiod accepts the following configuration options
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.br
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.br
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.SH OPTIONS
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.IP "\fB-a value\fP"
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DMA memory allocation mode
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0=AUTO, 1=PMAP, 2=MBOX
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default AUTO
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.IP "\fB-b value\fP"
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GPIO sample buffer in milliseconds
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100-10000
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default 120
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.IP "\fB-c value\fP"
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library internal settings
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default 0
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.IP "\fB-d value\fP"
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primary DMA channel
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0-14
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default 14
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.IP "\fB-e value\fP"
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secondary DMA channel
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0-14
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default 6
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.IP "\fB-f\fP"
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disable fifo interface
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default enabled
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.IP "\fB-k\fP"
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disable local and remote socket interface
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default enabled
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.IP "\fB-l\fP"
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disable remote socket interface
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default enabled
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.IP "\fB-p value\fP"
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socket port
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1024-32000
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default 8888
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.IP "\fB-s value\fP"
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sample rate
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1, 2, 4, 5, 8, 10
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default 5
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.IP "\fB-t value\fP"
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clock peripheral
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0=PWM 1=PCM
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default PCM
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.IP "\fB-v -V\fP"
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display pigpio version and exit
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.IP "\fB-x mask\fP"
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GPIO which may be updated
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A 54 bit mask with (1<<n) set if the user may update GPIO #n.
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default is the set of user GPIO for the board revision
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.br
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.br
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.SS Example
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.br
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.br
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.EX
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sudo pigpiod -s 2 -b 200 -f
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.br
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.EE
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.br
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.br
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Launch the pigpio library with a sample rate of 2 microseconds and a 200 millisecond buffer. Disable the fifo interface.
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.br
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.br
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.SS Permissions
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.br
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.br
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pigpio provides a rudimentary permissions system for commands issued via the socket and pipe interfaces.
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.br
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.br
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All GPIO may be read.
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.br
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.br
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Only the user GPIO for the board type or those specified by the -x option may be updated.
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.br
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.br
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.EX
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Type 1 boards 0x03E6CF93 (26 pin header)
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.br
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Type 2 boards 0xFBC6CF9C (26 pin + 8 pin header)
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.br
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Type 3 boards 0x0FFFFFFC (40 pin header)
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.br
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.EE
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.br
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.br
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In this context an update includes the following:
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.br
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.br
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GPIO mode set
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.br
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GPIO pull/up down
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.br
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GPIO write
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.br
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GPIO set PWM (including range and frequency)
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.br
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GPIO set servo
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.br
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.br
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In addition the bank clear and set commands, and the wave commands will only
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affect updateable GPIO.
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.br
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.br
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.SS Exceptions
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.br
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.br
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The following exceptions are made for particular models.
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.br
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.br
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.SS Models A and B
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.br
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.br
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The green activity LED (GPIO 16) may be written.
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.br
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.SS Models A+ and B+
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.br
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.br
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The green activity LED (GPIO 47) may be written.
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.br
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The red power LED (GPIO 35) may be written.
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.br
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The high USB power mode (GPIO 38) may be written.
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.br
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.SS Pi Zero
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.br
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.br
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The green activity LED (GPIO 47) may be written.
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.br
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.SS Pi2B
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.br
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.br
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The green activity LED (GPIO 47) may be written.
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.br
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The red power LED (GPIO 35) may be written.
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.br
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The high USB power mode (GPIO 38) may be written.
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.br
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.SS Pi3B
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.br
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.br
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The green activity LED and the red power LED are not writable.
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.br
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The USB power mode is fixed at 1.2 amps (high power).
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.br
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.br
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.br
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.SS DMA Channels
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.br
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.br
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The secondary channel is only used for the transmission of waves.
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.br
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.br
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If possible use one of channels 0 to 6 for the secondary channel (a full channel).
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.br
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.br
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A full channel only requires one DMA control block regardless of the length of a pulse delay. Channels 7 to 14 (lite channels) require one DMA control block for each 16383 microseconds of delay. I.e. a 10 second pulse delay requires one control block on a full channel and 611 control blocks on a lite channel.
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.br
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.br
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.SH SEE ALSO
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pig2vcd(1), pigs(1), pigpio(3), pigpiod_if(3), pigpiod_if2(3)
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.SH AUTHOR
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joan@abyz.co.uk
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