DocScrutinizer05 changed the topic of #qi-hardware to: Copyleft hardware - http://qi-hardware.com | hardware hackers join here to discuss Ben NanoNote, atben / atusb 802.15.4 wireless, and other community driven hw projects | public logging at http://en.qi-hardware.com/irclogs and http://irclog.whitequark.org/qi-hardware
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<larsc> great a SPI slave that doesn't reset it's SPI transceiver statemachine when CS goes high. Have a spurious clock cycle once, all future transactions will be off by one clock cycle :/
<wpwrak> but it's very robust against CS glitches ;-)
<larsc> yea ;)
<ysionneau> ahah
<larsc> well, it ignores SCK as long as CS is high, so you'd have a similar problem if you had a glitch on CS at the right time
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<wpwrak> ah, but what are the odds :)
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<larsc> right now I'm wondering how to fix this, the reset is the deserted long before CS and SCK become untristated and of course no testpoints where you could attach a pull-up to CS
<larsc> de-asserted
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<wpwrak> device doesn't have a reset-in pin either ?
<wpwrak> maybe you can implement some algorithm that determines the bit offset by a string of commands and evaluating the responses for the possible offsets
<wpwrak> s/by a/by sending a/
<qi-bot> wpwrak meant: "maybe you can implement some algorithm that determines the bit offset by sending a string of commands and evaluating the responses for the possible offsets"
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<larsc> the reset pin is hardwired to the power good signal, luckily that's going to change in the next rev
<larsc> I only can do multiples of 8 SCK cycles
<larsc> so once stuck, forver stuck
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<wpwrak> no GPIO on the "good" side of that interface ?
<kyak> very cool
<larsc> kyak: Linux on your SD card?
<larsc> wpwrak: kind of, a full fpga, but well I'm lazy ;)
<larsc> I don't want to implement some custom recovery methods
<wpwrak> lame ;-)
<larsc> strangly enough it works if I add a pull-up inside the fpga, even though the pin is actively driven
<larsc> at least that's what I assume
<wpwrak> kyak: neat :)
<larsc> but since I'm just routing a signal from the SoC through the fabric how knows how they hooked up the signal to the fabric internally
<kyak> yep, it's a 400 Mhz ARM, 32 Mb RAM and Wifi in an SD card, completely hackable
<kyak> (not because it was made hackable, but because it contains so many holes)
<kyak> wpwrak: i, by the way, bought another uSD-SD adapter. But before i start with it, i found an old 32Mb SD card to experiment with )
<kyak> i realized i need more thin wires as well.. mine are too thick
<kyak> and maybe i can finish this project with the iron i have
<wpwrak> maybe ... but you really ought to visit the electronics stores. this stuff isn't THAT expensive. you'll easily spend more on things you damage, oddball adapter boards, etc., than on a decent soldering iron
<kyak> yep. i already took notice of one model
<wpwrak> good :)
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<larsc> now lets hope that it takes notice of you as well and then you two can live on happily ever after
<kyak> -)
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