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SJSURoboticsTeam / urc-electrical-2023

Place for datasheets / pinouts of pcbs designed for SJSU robotics
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Different CAN Transceiver #38

Open swiftrax opened 1 year ago

swiftrax commented 1 year ago

Different IC from SN65HVD230 so that controls can use a logic analyzer since the voltages are lower

kammce commented 1 year ago

Controls can simply read the CANRX pin and get all of the information they need. As for the CANL and CANH lines, we should use a scope to analyze those signals. An IC change isn't necessary to read the lines. The saleae instructions state that you should measure CANL, but in my experience reading CANRX is the better option. CANRX contains all content on the bus. It has to in order for the CAN protocol to work. The protocol requires that we be able to read our own output to determine if we are being talked over by another device or to determine message arbitration.

kammce commented 1 year ago

And CANRX should be a strong single ended 3v3 signal.