yyrkoon 250 Posted November 25, 2015 Share Posted November 25, 2015 When connecting two devices( lets say two dev boards ) via I2C, or SPI. Is there any additional circuitry needed, or is is safe to directly connect them ? The specific boards I'm thinking of are two TI derived boards. A Beaglebone black, and any of the launchpads really. I have several launchpads. The MSP430 1.5, LM4F120 launchpad, and now a TivaC connected launchpad. I'm also pretty sure directly connecting UART is safe, but I've actually only done this from a MSP430 v1.5 launchpad to the serial debug header on the beaglebone black. EDIT: One thing that kind of bothers me, but might be a moot point ? Is that the Beaglebone black can come up with pins in undesirable modes. Then of course if this is the case, the pinmux might be bad, or configured incorrectly until the OS is loaded and running. Or is this less of a problem, or moot completely ? Quote Link to post Share on other sites
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