Unable to see msgs being received: 2 interfaces back to back
Posted: Fri 31. Aug 2018, 10:56
Hi - I'm having basically the same problem as was described here:
https://www.peak-system.com/forum/viewt ... f=7&t=2348
i.e. 2 brand new interfaces, cabled together using pins 2,3 & 7, with 4 270 Ohm resistors in parallel slugged across CAN high & low in the middle of 10cm long piece of untwisted ribbon cable to allow me to use 9 pins IDC connectors, crimped onto the cable. The cable is short enough that I wouldn't have thought that I need to terminate it at each end.
I'm running 2 instances of PCAN view & I've set the ID's to something other than the default FF for each interface. I can transmit (i.e .the transmit counter is incrementing each time that I hit the space bar), but nothing appears in the received window at the other end. I don't have a scope handy never mind differential probe - I haven't checked whats on the bus yet. The Red leds are on solidly, and I did install the drivers off the CD before inserting the USB plugs into my laptop. I'm not using any cable extensions or going through an unpowered hub.
PCANview seems intent on showing me 2 copies of the same interface, so perhaps I just need to figure out how to tell the 2 apart?
https://www.peak-system.com/forum/viewt ... f=7&t=2348
i.e. 2 brand new interfaces, cabled together using pins 2,3 & 7, with 4 270 Ohm resistors in parallel slugged across CAN high & low in the middle of 10cm long piece of untwisted ribbon cable to allow me to use 9 pins IDC connectors, crimped onto the cable. The cable is short enough that I wouldn't have thought that I need to terminate it at each end.
I'm running 2 instances of PCAN view & I've set the ID's to something other than the default FF for each interface. I can transmit (i.e .the transmit counter is incrementing each time that I hit the space bar), but nothing appears in the received window at the other end. I don't have a scope handy never mind differential probe - I haven't checked whats on the bus yet. The Red leds are on solidly, and I did install the drivers off the CD before inserting the USB plugs into my laptop. I'm not using any cable extensions or going through an unpowered hub.
PCANview seems intent on showing me 2 copies of the same interface, so perhaps I just need to figure out how to tell the 2 apart?