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Category Archives: logic analyser
SD card clock edge problems?
There’s something still not right with our SD card initialisation routines.We’ve suspected for a while that there’s something going on with the clock edge for reading/writing responses to/from the SD card.Our logic probe appears to be displaying what w… Continue reading
Posted in logic analyser, News, sd card
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SD card send/receive still not quite there
After breathing a massive sign of relief once the SD card starting responding to SPI commands, we thought it’d be relatively straight forward to get data into and out of the card. We’ve already worked with NAND flash memory (in our case AT45DB041D eepr… Continue reading
Posted in logic analyser, News, sd card
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Initialising an SD card with a 16F1825 PIC microcontroller
After nearly two days of headache and heartache – and thanks in no small part to the brilliant Arduino/AVR code from Chris McClelland- we finally managed to successfully initialise an SD card with our PIC microcontroller.Before we stuff it up and it st… Continue reading
Posted in 16F1825, logic analyser, News, sd card
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SD Card SPI timing graphs
This whole SD-card-access-via-SPI is proving to be a bit of a headache.Just to make sure we’re not having a timing issue (cards need to be interfaced at < 400khz until properly initialised) we’ve even resorted to bit-banging the SPI and introducing … Continue reading
Posted in logic analyser, News, sd card
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Sourceboost SD Card reader
We’re having a bit of a time of it at the minute, just trying to get our PIC16F1825 to correctly initialise an SD card. It’s not helped by the fact that we’re using a new chip we’ve never used before, in a language/syntax we’ve not used for a long time… Continue reading
Posted in 16F1825, logic analyser, News, sd card
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