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15:07.45 | wookey_ | anyone here know a good (cheap) tool for connecting to an I2C Bus (100Khz) and logging packets? |
15:08.28 | wookey_ | I need to hack a device at the I2C level and am hoping someone does a cheapo interface to USB or something. Not found anything under 300 euro so far |
15:57.12 | Zoiah | wookey_: http://www.diolan.com/i2c/u2c12.html |
15:57.18 | Zoiah | wookey_: I use this and I'm happy with it. |
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16:04.25 | methril_home | wookey_: what OS do you have? not all of them has Linux support (for example) and only a few has mac support |
16:05.31 | wookey_ | methril_home: I have linux of course |
16:06.49 | methril_home | wookey_: i know this DIY http://minila.sourceforge.net/ |
16:07.14 | methril_home | it could be cheap |
16:07.28 | wookey_ | Zoiah: price is good, but the info suggests it is for writing to the bus rather than reading from it, but I guess any practical device actually does both? |
16:08.10 | methril_home | http://www.sparkfun.com/commerce/product_info.php?products_id=8938 |
16:08.35 | methril_home | they promised Linux support, but i didn't see it yet |
16:08.45 | Zoiah | wookey_: it does both. |
16:09.26 | wookey_ | OK, cheers guys - that looks like several plausible solutions |
16:09.35 | Zoiah | I used it to read and write the I2C bus on optical transceivers. |
16:09.42 | methril_home | you're wellcome |
16:09.43 | Zoiah | Specifically the eeprom on it. |
16:09.53 | wookey_ | I've just spent best part of an hour copying waveform off scope to sample one packet |
16:10.33 | wookey_ | Which is more than enough to persude me to spend some money on a more efficient scheme :-) |
16:10.42 | Zoiah | For what purpose? |
16:10.58 | wookey_ | At leasy I've stopped trying to treat the signal as RS484 or RS232, which was my first guess :-) |
16:11.04 | methril_home | i'm looking for a scope/data logger & waveform generator all together |
16:11.13 | wookey_ | It's a Fronius PV inverter |
16:11.50 | wookey_ | It's output is scret. You have to buy their £300 interface if you want to get any data out of it |
16:11.56 | wookey_ | Its |
16:12.31 | wookey_ | I'm trying to work out if we can make practical cheper interfaces (I'm sure we can - it's just a question of how much reverse engineering is needed to get good data |
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