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| author | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:55:15 -0400 |
|---|---|---|
| committer | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:55:15 -0400 |
| commit | 253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch) | |
| tree | adf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man4/ds28e17iic.4 3.html | |
| parent | a9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff) | |
docs: Added All NetBSD Manuals
Diffstat (limited to 'static/netbsd/man4/ds28e17iic.4 3.html')
| -rw-r--r-- | static/netbsd/man4/ds28e17iic.4 3.html | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/static/netbsd/man4/ds28e17iic.4 3.html b/static/netbsd/man4/ds28e17iic.4 3.html new file mode 100644 index 00000000..07aca3af --- /dev/null +++ b/static/netbsd/man4/ds28e17iic.4 3.html @@ -0,0 +1,92 @@ +<table class="head"> + <tr> + <td class="head-ltitle">DS28E17IIC(4)</td> + <td class="head-vol">Device Drivers Manual</td> + <td class="head-rtitle">DS28E17IIC(4)</td> + </tr> +</table> +<div class="manual-text"> +<section class="Sh"> +<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1> +<p class="Pp"><code class="Nm">ds28e17iic</code> — + <span class="Nd">Driver for Maxim DS28E17 1-Wire to I2C bridge</span></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1> +<p class="Pp"><code class="Cd">ds28e17iic* at onewire?</code></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> +<p class="Pp">The <code class="Nm">ds28e17iic</code> driver provides a 1-Wire to + I2C bridge with a <a class="Xr">iic(4)</a> bus at the far end using the + DS28E17 bridge chip.</p> +<p class="Pp">The DS28E17 will automatically detect and deal with a device at + the other end of the bus that uses I2C clock stretching.</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="SYSCTL_VARIABLES"><a class="permalink" href="#SYSCTL_VARIABLES">SYSCTL + VARIABLES</a></h1> +<p class="Pp">The following <a class="Xr">sysctl(3)</a> variables are + provided:</p> +<dl class="Bl-tag"> + <dt id="hw.ds28e17iic0.readycount"><a class="permalink" href="#hw.ds28e17iic0.readycount"><code class="Li">hw.ds28e17iic0.readycount</code></a></dt> + <dd style="width: auto;"> </dd> + <dt id="hw.ds28e17iic0.readydelay"><a class="permalink" href="#hw.ds28e17iic0.readydelay"><code class="Li">hw.ds28e17iic0.readydelay</code></a></dt> + <dd>When the driver sends a transaction down the 1-Wire bus, these variables + are how long to delay before reading the status on whether or not the + conversion is done and the number of times to perform this read back. In + general, these values should be as short as possible, but if there are too + short, a EAGAIN timeout will occur when the end device is just taking a + longer than expect amount of time to respond. This may be particularly + noticed if end device is doing clock stretching.</dd> + <dt id="hw.ds28e17iic0.reportreadnostop"><a class="permalink" href="#hw.ds28e17iic0.reportreadnostop"><code class="Li">hw.ds28e17iic0.reportreadnostop</code></a></dt> + <dd>If set to 1, report that an attempt to do a Read without a Stop occurred. + The chip does not support that operation. Read without Stop will be + treated as a Read with a Stop with the hope that the end device will be + able to deal with that.</dd> + <dt id="hw.ds28e17iic0.reportzerolen"><a class="permalink" href="#hw.ds28e17iic0.reportzerolen"><code class="Li">hw.ds28e17iic0.reportzerolen</code></a></dt> + <dd>If set to 1, report that an attempt to perform a zero length read or zero + length write occurred. The chip does not support zero length reads or + writes.</dd> + <dt id="hw.ds28e17iic0.debug"><a class="permalink" href="#hw.ds28e17iic0.debug"><code class="Li">hw.ds28e17iic0.debug</code></a></dt> + <dd>If the driver is compiled with <code class="Dv">DS28E17IIC_DEBUG</code>, + this node will appear and can be used to set the debugging level.</dd> +</dl> +</section> +<section class="Sh"> +<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE + ALSO</a></h1> +<p class="Pp"><a class="Xr">onewire(4)</a>, <a class="Xr">iic(4)</a>, + <a class="Xr">sysctl(8)</a></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1> +<p class="Pp">The <code class="Nm">ds28e17iic</code> driver first appeared in + <span class="Ux">NetBSD 11.0</span>.</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1> +<p class="Pp">The <code class="Nm">ds28e17iic</code> driver was written by + <span class="An">Brad Spencer</span> + <<a class="Mt" href="mailto:brad@anduin.eldar.org">brad@anduin.eldar.org</a>>.</p> +</section> +<section class="Sh"> +<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1> +<p class="Pp">While this may not be considered a bug, the DS28E17 chip will + detach itself from the <a class="Xr">onewire(4)</a> bus if there is not a + device connected to its SDA and SCL pins.</p> +<p class="Pp">The <a class="Xr">i2cscan(8)</a> command will not function + entirely correctly when run against a DS28E17 chip. The default mode of + doing a I2C Write with Stop that is zero length is not supported by the + DS28E17 chip. When the <a class="Xr">i2cscan(8)</a> command is used with its + one byte read mode it will find devices as long as the device does not NACK + on a I2C read.</p> +<p class="Pp"></p> +</section> +</div> +<table class="foot"> + <tr> + <td class="foot-date">January 12, 2025</td> + <td class="foot-os">NetBSD 10.1</td> + </tr> +</table> |
