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<p class="" style="margin-bottom:0cm">Hey all,</p><p class="" style="margin-bottom:0cm">Some success finally:</p><p class="" style="margin-bottom:0cm">Hurrah!!</p><p class="" style="margin-bottom:0cm">The scl breakout pin on the pi proto plate wasn't working properly.</p>
<p class="" style="margin-bottom:0cm">When unscrewed halfway it works, when fully screwed in it doesn't.</p><p class="" style="margin-bottom:0cm">So - now got this:<br></p>
<p class="" style="margin-bottom:0cm">i2cdetect -y 0</p>
<p class="" style="margin-bottom:0cm"> 0 1 2 3 4 5
6 7 8 9 a b c d e f</p>
<p class="" style="margin-bottom:0cm">00: -- -- --
-- -- -- -- 0a -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">10: -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">20: -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">30: -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">40: -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">50: -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">60: -- -- -- -- -- --
-- -- -- -- -- -- -- -- -- --
</p>
<p class="" style="margin-bottom:0cm">70: -- -- -- -- -- --
-- -- <br></p><p class="" style="margin-bottom:0cm">and</p><p class="" style="margin-bottom:0cm">i2cdump -y 0 0xa <br>No size specified (using byte-data access)</p><p class="" style="margin-bottom:0cm">Gives a whole host of stuff I don't yet understand but I don't care currently as something is actually happening.</p>
<p class="" style="margin-bottom:0cm">Will figure out a way of saving the console info (any hints anyone?) as it gets badly mangled when cutting and pasting but basically something like this:</p><p class="" style="margin-bottom:0cm">
i2cdump -y 0 0xa <br>No size specified (using byte-data access)<br> 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef<br>00: ff XX XX XX XX XX XX ff XX XX XX XX ff ff ff XX .XXXXXX.XXXX...X<br>
10: XX ff XX XX XX XX XX ff XX ff XX ff XX XX ff XX X.XXXXX.X.X.XX.X<br>20: ff XX XX ff XX XX ff XX XX XX XX ff XX XX XX ff .XX.XX.XXXX.XXX.<br>30: XX ff XX ff XX XX XX XX ff ff ff XX XX XX XX XX X.X.XXXX...XXXXX<br>
40: XX XX XX ff XX ff XX XX XX 64 XX XX d5 XX XX ff XXX.X.XXXdXX?XX.<br>50: XX ff XX XX XX XX XX XX XX ff XX XX ff XX XX XX X.XXXXXXX.XX.XXX<br>60: ff XX XX XX ff XX XX XX XX XX XX XX XX ff XX XX .XXX.XXXXXXXX.XX<br>
70: XX XX XX XX XX XX XX ff XX XX XX XX XX XX XX XX XXXXXXX.XXXXXXXX<br>80: XX ff XX XX ff ff XX XX XX ff XX XX XX XX XX XX X.XX..XXX.XXXXXX<br>90: XX XX ff XX XX ff XX ff XX ff ff XX XX ff ff XX XX.XX.X.X..XX..X<br>
a0: XX ff XX XX ff XX XX XX XX XX XX XX XX XX ff XX X.XX.XXXXXXXXX.X<br>b0: XX XX ff XX XX XX ff XX XX ff XX XX XX XX XX XX XX.XXX.XX.XXXXXX<br>c0: XX XX XX XX ff XX XX ff ff XX XX ff ff XX XX XX XXXX.XX..XX..XXX<br>
d0: XX XX XX XX XX ff XX ff XX XX XX XX XX ff XX ff XXXXX.X.XXXXX.X.<br>e0: XX XX XX ff XX ff XX XX XX XX XX XX XX XX ff XX XXX.X.XXXXXXXX.X<br>f0: ff XX ff ff XX XX XX XX XX XX XX XX XX XX ff XX .X..XXXXXXXXXX.X</p>
<p class="" style="margin-bottom:0cm"><br></p><p class="" style="margin-bottom:0cm">Progress at least.</p><p class="" style="margin-bottom:0cm">Cheers,</p><p class="" style="margin-bottom:0cm">Julian<br></p><p class="" style="margin-bottom:0cm">
<br></p><p class="" style="margin-bottom:0cm"><br></p><p class="" style="margin-bottom:0cm"> <br><br></p>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On 12 April 2013 11:27, Julian Brooks <span dir="ltr"><<a href="mailto:jbeezez@gmail.com" target="_blank">jbeezez@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div>Message resent for thread archives with smaller picture size.<span class="HOEnZb"><font color="#888888"><br><br></font></span></div><span class="HOEnZb"><font color="#888888">Julian<br></font></span><div>
<div><br><div class="gmail_quote"><div class="im">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Julian Brooks</b> <span dir="ltr"><<a href="mailto:jbeezez@gmail.com" target="_blank">jbeezez@gmail.com</a>></span><br>
Date: 11 April 2013 19:24<br>Subject: Re: [PD] Sensors GPIO Raspberry Pi Pd<br></div><div class="im">To: Martin Peach <<a href="mailto:martin.peach@sympatico.ca" target="_blank">martin.peach@sympatico.ca</a>><br>Cc: PD List <<a href="mailto:pd-list@iem.at" target="_blank">pd-list@iem.at</a>><br>
<br><br></div><div><div class="h5"><div dir="ltr"><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Hey Martin / list,</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Finally got all the stuff and ...</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">It’s not working! </span><span style="font-size:12pt;font-family:Wingdings"></span><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">We spent the day soldering cables and connecting stuff up as per the Omron ‘App Note 01’ spec sheet.</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Started off super-conservative using the I2C level converter (case 3 page 4) <a href="http://www.adafruit.com/products/757#Blog/Flickr" target="_blank">http://www.adafruit.com/products/757#Blog/Flickr</a></span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">We tried resistors on both sides (being super paranoid!) and then we took the low (Pi) side ones off.</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">We then moved on to case 2 page 3 of this same document… </span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p><p> <span style="font-size:12pt;font-family:"Arial","sans-serif"">At each stage we checked with “I2Cdetect –Y 1” and nothing was visible.</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">The grid shows no attached devices every time we run it.</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">We re-booted at every stage following the various online tutorials/methods of setting up I2C GPIO on the Pi (checked & double checked).</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif""><br></span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p><p>
<span style="font-size:12pt;font-family:"Arial","sans-serif"">As you can see we’re using a pi protoplate:</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif""><a href="https://www.adafruit.com/products/801" target="_blank">https://www.adafruit.com/products/801</a></span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p><p> </p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">In the photo I’ve attached the cables are coded as follows:</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p><p> </p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Orange GND</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Yellow 5v</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Blue SCL</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Green SDA</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p>
<p> </p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">The white is also 5v for the pull up resistors.</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">The resistor values are 4.7k btw.</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p><p> </p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">We have tested the cable that terminates at the sensor and all that is OK.</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">I put a multimeter on the GND and SDA solder points on the sensor itself and got 3.7v…</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">I put a multimeter on the GND and SCL solder points on the sensor itself and got 0.0v…</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p><p> </p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Don’t know if this means anything or could be useful to know!</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Stuck and frustrated now but hey, 3 weeks ago I knew absolutely bugger all about any of this and now I do (sort of).</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">I'm thinking we could do with the most basic i2c sensor we can find as we have nothing to compare.</span></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Tonight I'm going to d/l a fresh raspbian and start from scratch to check that end.</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Feel like if we can't get past the 'i2c-tools' tests we're screwed - never mind getting it in and out of Pd.</span></p>
<p><span style="font-size:12pt;font-family:"Arial","sans-serif"">Any thoughts/pointers/options from anyone will be really appreciated?</span></p><p><br></p><p>Cheers,</p><p>
<br></p><p>Julian<br></p><p><span style="font-size:12pt;font-family:"Arial","sans-serif""></span></p></div><div><div><div class="gmail_extra"><br><br><br></div>
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