http://forums.leaflabs.com/topic.php?id=1070 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:24:14 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1070#post-6577 Sun, 25 Sep 2011 00:48:29 +0000 gulu2065 6577@http://forums.leaflabs.com/ <p>I use arduino Mega 2560 to work as Master and Maple as slave to test whether my maple can read data correctly. Mega 2560 generate data at the speed of 2Mhz.<br /> I alternately generate 00000000 and 00001001.<br /> Here is the code for arduino to generate data<br /> #include &lt;SPI.h&gt;<br /> int i=0;<br /> void setup() {<br /> pinMode (50, OUTPUT);<br /> pinMode (52, OUTPUT);<br /> SPI.begin();<br /> SPI.setBitOrder(MSBFIRST);<br /> SPI.setClockDivider(SPI_CLOCK_DIV2);<br /> SPI.setDataMode(SPI_MODE1);<br /> }</p> <p>void loop() {<br /> SPI.transfer(9);<br /> SPI.transfer(0);<br /> }<br /> And this is the code for Maple to read data<br /> HardwareSPI spi(1);<br /> int i;<br /> void setup() {<br /> spi.beginSlave(MSBFIRST, 1);<br /> }<br /> void loop() {<br /> byte response = spi.read();<br /> SerialUSB.println(response, BIN);<br /> }<br /> I find that the the data read by Maple is not 00000000 and 00001001 show up alternately, it seems, several 00000000 and then several 00001001 or something.<br /> Does this means my maple is overflow and lost some data? </p>