http://forums.leaflabs.com/topic.php?id=187 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:21:03 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=187#post-1290 Wed, 15 Sep 2010 09:06:25 +0000 josheeg 1290@http://forums.leaflabs.com/ <p>can I use the maple spi function to load the spi config into the registers then use the sclk line like a gpio after that to clock the data out? or is that port have to be reconfigured to act as gpio?? </p> http://forums.leaflabs.com/topic.php?id=187#post-1249 Tue, 14 Sep 2010 14:11:26 +0000 poslathian 1249@http://forums.leaflabs.com/ <p>I will look more closely at the implementation and try to build a mode table for the spi docs. Even if you are only using a single chip, you still need the chip select (NSS) line. SPI transactions are initiated via pulling NSS low, and ended via pulling it high. Even with only one chip on the bus, this toggle is essential. </p> http://forums.leaflabs.com/topic.php?id=187#post-1247 Tue, 14 Sep 2010 14:09:18 +0000 x893 1247@http://forums.leaflabs.com/ <p>NSS = negative slave select </p> http://forums.leaflabs.com/topic.php?id=187#post-1246 Tue, 14 Sep 2010 12:43:46 +0000 josheeg 1246@http://forums.leaflabs.com/ <p>SPI documentation question The first has NSS on D10.What is NSS? The chip I am using will alwase be selected so could I switch the spi port the data is going to to send different data to 2 spi devices on the maple? Also can the pins be used as GPIO pins after the data is loaded into the device?</p> <p>The sclk would clock data to a high speed usb module after the spi interface loads the registers. </p> <p>THe slave chip issues a data ready on its drdy pin so would I test for that then run the spi function?</p> <p>The Maple has two SPI ports. The first has NSS on D10, MOSI on D11, MISO on D12, and SCK on D13.</p> <p>could the modes be described in a table? </p>