WVAS u b db sb o bvs :: Add serial data to waveform :: gpioWaveAddSerial
WVCRE :: Create a waveform :: gpioWaveCreate
-WVCAP :: Create a waveform of fixed size :: gpioWaveCreatePad
+WVCAP percent :: Create a waveform of fixed size :: gpioWaveCreatePad
WVDEL wid :: Delete selected waveform :: gpioWaveDelete
WVTX wid :: Transmits waveform once :: gpioWaveTxSend
WVCAP ::
-Similar to [*WVCRE*], this command creates a waveform but pads the consumed
-resources to a fixed size, specified as a percent of total resource.
-Padded waves of equal size can be re-cycled efficiently allowing newly
-created waves to re-use the resources of deleted waves of the same dimension.
+Create a waveform of fixed size. Similar to [*WVCRE*], this command creates a waveform but pads the consumed resources to a fixed size, specified as a [*percent*] of the total resources. Padded waves of equal size can be re-cycled efficiently allowing newly created waves to re-use the resources of deleted waves of the same dimension.
-Upon success a wave id (>=0) is returned. On error a negative status
-code will be returned.
+Upon success a wave id (>=0) is returned. On error a negative status code will be returned.
-The data provided by the [*WVAG*] and [*WVAS*] commands are
-consumed by this command.
+The data provided by the [*WVAG*] and [*WVAS*] commands are consumed by this command.
-As many waveforms may be created as there is space available.
-The wave id is passed to [*WVTX*] or [*WVTXR*] to specify the
-waveform to transmit.
+As many waveforms may be created as there is space available. The wave id is passed to [*WVTX*] or [*WVTXR*] to specify the waveform to transmit.
Normal usage would be
Repeat steps 2 - 4 as needed.
-Step 5. Any wave id can now be deleted and another wave of the same size
- can be created in its place.
+Step 5. Any wave id can now be deleted and another wave of the same size can be created in its place.
+
+Example
...
# Create a wave that consumes 50% of the total resource:
pdc :: hardware PWM dutycycle (0-1000000)
The command expects a dutycycle.
+percent :: percent (1-100)
+The percent of wave resources to allocate to a wave. It can be useful
+to create waves of fixed sizes to prevent wave fragmentation (where
+there are plenty of resources but not a large enough contiguous space).
+
pf :: hardware PWM frequency (1-125M, 1-187.5M for the BCM2711)
The command expects a frequency.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
-<meta name="generator" content="Bluefish 2.2.10" >
+<meta name="generator" content="Bluefish 2.2.11" >
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>download</title>
</head>
compilation of pigpio.c, takes 100 seconds on early model
Pis. Be patient. The overall install takes just over 3
minutes.</span><br style="font-weight: bold;">
-<h3>Download and install (V75)<br></h3>
-<code>wget https://github.com/joan2937/pigpio/archive/v75.zip<br>
-unzip v75.zip<br>
-cd pigpio-75<br>
+<h3>Download and install latest version<br></h3>
+<code>
+wget https://github.com/joan2937/pigpio/archive/master.zip<br>
+unzip master.zip<br>
+cd pigpio-master<br>
make<br>
-sudo make install<br></code><br>
+sudo make install<br>
+</code>
<br>
If the Python part of the install fails it may be because you need
the setup tools.<br>
.B WVCRE
Create a waveform
.P
-.B WVCAP
-Create a waveform of fixed size
+.B WVCAP percent
+Create a waveform of fixed size
.P
.B WVDEL wid
Delete selected waveform
.br
-.IP "\fBWVCAP \fP - Create a waveform of fixed size"
+.IP "\fBWVCAP percent\fP - Create a waveform of fixed size"
.IP "" 4
.br
-Similar to \fBWVCRE\fP, this command creates a waveform but pads the consumed
-resources to a fixed size, specified as a percent of total resource.
-Padded waves of equal size can be re-cycled efficiently allowing newly
-created waves to re-use the resources of deleted waves of the same dimension.
+Create a waveform of fixed size. Similar to \fBWVCRE\fP, this command creates a waveform but pads the consumed resources to a fixed size, specified as a \fBpercent\fP of the total resources. Padded waves of equal size can be re-cycled efficiently allowing newly created waves to re-use the resources of deleted waves of the same dimension.
.br
-Upon success a wave id (>=0) is returned. On error a negative status
-code will be returned.
+Upon success a wave id (>=0) is returned. On error a negative status code will be returned.
.br
-The data provided by the \fBWVAG\fP and \fBWVAS\fP commands are
-consumed by this command.
+The data provided by the \fBWVAG\fP and \fBWVAS\fP commands are consumed by this command.
.br
-As many waveforms may be created as there is space available.
-The wave id is passed to \fBWVTX\fP or \fBWVTXR\fP to specify the
-waveform to transmit.
+As many waveforms may be created as there is space available. The wave id is passed to \fBWVTX\fP or \fBWVTXR\fP to specify the waveform to transmit.
.br
Normal usage would be
Repeat steps 2 - 4 as needed.
.br
-Step 5. Any wave id can now be deleted and another wave of the same size
- can be created in its place.
+Step 5. Any wave id can now be deleted and another wave of the same size can be created in its place.
+
+.br
+Example
.br
.br
+.IP "\fBpercent\fP - percent (1-100)" 0
+The percent of wave resources to allocate to a wave. It can be useful
+to create waves of fixed sizes to prevent wave fragmentation (where
+there are plenty of resources but not a large enough contiguous space).
+
+.br
+
.IP "\fBpf\fP - hardware PWM frequency (1-125M, 1-187.5M for the BCM2711)" 0
The command expects a frequency.
projects / pigpio.git / commitdiff