Dear all,
I've tested with NXP's MPC5777C example code for MCAN configuration.
I want to implement CAN FD.
So It works well below configuration..
1. Maximum baudrate : 3.3Mbps (As you know, CAN FD baud rate is set 2, 4, 8Mbps. But I tested 1Mbps, 2Mbps, and 3.xxMbps through adust a DTSEG1, DTSEG2. Below 3.xxMbps work well, There is no error. But 4 and 8Mbps don't work well, CAN Communication always failed)
2. Maximum data length : 64Byte. It is Ok.
More specific, When I configured DBTP(same as FBTP) value as 4Mbps.. Like these 2 cases.
Both of them don't work well...
Our XOSC is 40MHz, and MCAN clock rerence is XOSC(40MHz)
Case 1:
MCAN_0.FBTP.B.FBRP = 0x0;
MCAN_0.FBTP.B.FTSEG1 = 5;
MCAN_0.FBTP.B.FTSEG2 = 2;
MCAN_0.FBTP.B.FSJW = 2;
Case 2:
MCAN_0.FBTP.B.FBRP = 0x1;
MCAN_0.FBTP.B.FTSEG1 = 2;
MCAN_0.FBTP.B.FTSEG2 = 0;
MCAN_0.FBTP.B.FSJW = 1;
So I guess that main reason of this situation(baud rate limitation as 3.xxMbps) is that our CAN Transceiver NXP TJA1145T/FD can't support above 2Mbps.
Is it right?
Or MY FBTP configuartion is incorrect?
Addtionally, Also 8Mbps doesn't work well...
Please give me advice.
Thanks everyone.
