clintr-at-kornak

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Everything posted by clintr-at-kornak

  1. Got it working using the setup I described, but with 1000 kbps data rate, yellow=CAN-High, green=CAN-Low.
  2. Found by experiment to be 1000 kbps
  3. Hello, I'm hoping one of you might be able to answer some questions about getting CAN communications working? I'm trying to communicate between a DMC60C and an MCBSTM32 dev board. Here are some details of my setup: The dev board includes a 120 ohm termination resistor on the CAN bus. From the DMC60C, I have connected one of the signal cables to my dev board, and I've put a 120 ohm termination resistor across the other signal cable. I don't know what data rate the DMC60C expects on the CAN bus, so I'm using 500kbps for now. I'm using the DMC60C CAN Protocol Guide (October 24, 2018), as a reference. I power up the DMC60C, wait for the LEDs to stop showing blue and start alternately flashing red-on-top/red-on-bottom, then have my dev board send the msgIdEnum message. I can see on a 'scope that the data is sent correctly, but the DMC60C doesn't assert the ACK bit at the end of the message. Here are the questions I have. 1. What is the expected CAN data rate? 2. Could you please confirm these details for the msgIdEnum message: - sent with the 29-bit message identifier == 0x00000240 - no data bytes 3. The signal cables each have a green wire and a yellow wire; which is CAN-High and which is CAN-Low? (I have tried both ways.) 4. The voltage difference on the CAN bus is about 2V when transmitting a zero bit - does it need to be higher? Thanks, any help is appreciated.
  4. Hello, what is the CAN data rate used for the DMC60C? Thanks.