The CAN transfer bitrate configured on the S32DS is different from that detected by the CAN tool

[shuo41]

The CAN transfer bitrate configured on the S32DS is different from that detected by the CAN tool,why?bitrate configured by s32dscan tool on pc(through can Analyser)

[PetrS]

Hi,

check if selected protocol clock is really the one you specified (40MHz) within clock config.

BR, Petr

[shuo41]

It is 40MHZ 

[PetrS]

Hi,

then check if clock is really configured and system clock running from PLL. Also measure TXD line with scope/analyzer to know real bitrate.

You can also check FlexCAN bit timing registers for values written.

BR, Petr

[shuo41]

I am testing LIN.When I fill in the baud rate column with 9600, my logic analyzer cannot receive data correctly at 9600.When I fill in the baud rate column with 3700, my logic analyzer correctly receives data at 9600.

[PetrS · Accepted solution]

Hi,

share project which shows the issue so we can check.

BR, Petr

[shuo41]

HI,I Solved the problem. My external clock configuration is incorrect.The external clock is 40MHz, and I have configured it to be 16MHz.Thinks for your help.

[shuo41]

Its source is PLL, that's right. The bit rate measured by my oscilloscope is incorrect.I test Lin, The baud rate it outputs is also incorrect.