tonton81
Senior Member

you can disable and reenable fifo by default it'll accept all then filter afterwards as needed

I see you setting K bus filter but not setting up the K bus, unless you posted partial code, can't help much. the filters are only updatable while the bus is deactivated, so that is fine and does as it's expected to....

you can bitshift the unsigned bytes then cast as needed for example RPM: byte 4 and 5 int value = buf << 8 | buf;

I have FIFO running on 3 busses at same time without loss. Are you using interrupts or loop method or polling? FIFO clears when all messages are read

programming resistor on haltech also if you're asking about a custom configuration, there should be max 2 resistors in a bus 120ohms each furthest device. if you do remove the 120 ohm from your transceiver and you...

you'll need to check your haltech if it has resistors built in, and if it does they should have a way to disable it in programming

The CAN lines are on the OBD port, yes they go thru a gateway too. Could be 1 or 2 other busses that's on. You have also a body CAN bus, which is nice, because it has data available while the vehicle is off. You could...

you wont slow them down unless you're flooding the bus, even at 50ms gaps you should be fine, but recommend you be lenient

there should be 2x 120 ohm on that PCB ```This tiny Teensy add-on board features dual CAN-Bus transceiver circuits, including termination resistors``` 1x 120 ohm per bus, most likely the ones on the side, i tried to...

that is a cool trick, but extra latency you wouldn't physically notice in the loop() 🙂

dont add terminations in a vehicle, the vehicle is already terminated. if devices you have added have resistors, remove their resistors. if your cluster goes limp, your CANL & CANH lines are reversed. fix them and...

1000kbps with no terminations? that'll never work. MAYBE at 125kbps, MAYBE, but definately nothing will work at >125kbps without terminations.

last update only supports SPI, not SPI1, so currently no support is implemented in last update