To daisy chain serial communication in a ring is well known old technology which may have good real time performance. It is sometimes used for SPI and JTAG devices. It is also used in the DMX protocol. Not the least it is used on the new state of the of the art Ethercat protocol. Do anybody know about a serial daisy chain protocol?
I figured to send CANopen packages would work rather well but a standard protocol is better. I have a choice to send exactly one message to each node every time or allow to insert a few extra which may be used for CANopen SDO messages but add complexity. Low overhead is good but if more than half of bandwidth may be used for payload there is not to much to gain. Even though Ethercat is a good protocol I still think there is a place for UART and SPI not the least for communication within circuit board and a daisy protocol would work around the problem there is not enough available ports available then only a fraction of the bandwidth is used. Regards Nicklas Karlsson ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
