SPI, Master receiving data from the Slave, how to?
hi, might have made hard on myself on project. perhaps it's best start @ beginning. final thesis extracting high resolution data. data (in case) generated @ 90 khz, know it's not fast arduino's. transportation "line" (fieldbus) has maximum speed of around 30 khz. means need buffer generated data, since don't want lose of it. far it's pretty straight forward. now i've decided use spi communication. way i've setup case follows: slave1 > master > slave2 slave1 = simulation of data generation. (arduino uno) master = arduino due, because has possibility switch between multiple slaves slave2 = fieldbus slave, gives interrupt master has send data slave (arduino uno). so since i'm pretty new spi thought let's start basics. used example code http://www.gammon.com.au/forum/?id=10892 has been helpful. i've been able send data master slaves, simple texts. without interrupt "talks" slave 1 , interrupt "talks" sla...