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Currently I am working on a project which needs me to configure the hardware from low-speed CAN (100 kbit/s) to high speed (@500 kbit/s). The CAN controller supports baud rates up to 1 Mbit/s.

I am generating the configuration files using the VECTOR GENy tool. I have tried following configurations, but nothing seems to work out. Did I miss something?

Clock: 60 MHz, sampling 75%, prescaler = 8.

Clock: 60 MHz, Sampling 80%, prescaler = 5.

Clock: 12 MHz, sampling 75%, prescaler = 8.

Clock: 12 MHz, sampling 80%, prescaler = 5.

When I am using the above configurations, I am getting No Ack errors and bit errors. Do I need to modify the RX buffer and TX buffer?

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    \$\begingroup\$ With "low speed" do you mean fault-tolerant CAN? Or just lower baudrate? \$\endgroup\$ – Lundin Dec 13 '18 at 11:35
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    \$\begingroup\$ "I am getting No Ack error" Are there other nodes on the bus? If not, then that's your problem. \$\endgroup\$ – Lundin Dec 13 '18 at 12:59
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    \$\begingroup\$ Low baud rate CAN (100 Kbps). There are no other Nodes, as its in Development state, I Know that's my problem, just wanna know if I missed anything . \$\endgroup\$ – Sagar Dec 14 '18 at 11:42
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    \$\begingroup\$ Put the controller in loopback mode or preferably get a CAN listener. The latter is a must in the long run. \$\endgroup\$ – Lundin Dec 14 '18 at 11:44
  • \$\begingroup\$ Ya that feature is available in the CAN analyser I am using.. will work on it.. Thanks. \$\endgroup\$ – Sagar Dec 14 '18 at 12:04
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Try this website for your configurations:

http://www.bittiming.can-wiki.info/

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