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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 ?
<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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