TMDSCNCD28388D: eCAN configuration

Kripa Ganapathi

Part Number: TMDSCNCD28388D
Other Parts Discussed in Thread: C2000WARE, TMS320F28388D

I am trying to configure the eCAN module on the TMDSCNCDF28388D control card but there is no activity seen on the GPIO pins 30,31. My setup includes the control card mounted on a breakout board, the CANRx and CANTx pins are connected to a transceiver, and the output high/low are connected to a PCAN-USB adapter that is connected to my PC.

I am running the example program can_ex5_transmit_receive given in the c2000_ware directory (without making any changes). The program doesn't seem to be loading past the void main() SW breakpoint when started debug and continues running without any output when resumed.

It also displays two other points on the debug console: (have attached a screenshot for reference)

_args_main() at args_main.c:137 0x00834A
_c_int00() at boot2.asm:264 0x0080D0 (_c_int00 does not contain information)

I have checked other questions similar to mine and the answers suggest following the debug strategies given here. Since I am quite new to CCS, the instructions are quite difficult to understand. For example, I do not know how to check if the clock to the CAN module is enabled or if writes to the CAN register are going through.

I have also tried using Simulink by following this documentation but there is no output visible on the GPIO pins or the PCAN-View software

Please do provide any other detailed documentation or video that I can refer to for this issue.

8 months ago

0 Sahil Deshpande 8 months ago

TI__Expert 6035 points

Kripa,

Kripa Ganapathi said:
I am running the example program can_ex5_transmit_receive given in the c2000_ware directory

Do you mean the example from this path: C2000Ware_X_XX_00_00\driverlib\f2838x\examples\c28x\can

These examples are for the DCAN module, not the eCAN module.

In the second image enclosed, I see that the CPU2 also seems to be connected. Make sure that while starting the debug you are only choosing to program CPU1 (there will be a popup when you press debug)

Kripa Ganapathi said:
I do not know how to check if the clock to the CAN module is enabled or if writes to the CAN register are going throug

In the CCS debug view (seen in the images attached), on the right side, you see a pane for Registers. You can go down the list and observe the values for each of the registers. Place a breakpoint to after the CAN configuration is done, and check in the Registers view to check that the settings are as expected.

Thanks.

0 Kripa Ganapathi 8 months ago in reply to Sahil Deshpande

Prodigy 20 points

Thank you for the reply. Sorry for the confusion, I meant DCAN only and not eCAN, have I made any other wrong assumptions for the DCAN module to not work under my current configuration?

Thank you

0 Hareesh Janakiraman 8 months ago in reply to Kripa Ganapathi

TI__Guru* 95315 points

Kripa,

eCAN is present only in older C2000 devices. TMS320F28388D has two types of CAN: DCAN (Classic CAN) and MCAN (CAN FD). Please download my Application report http://www.ti.com/lit/SPRACE5 and look at the Debug tips provided. Most CAN issues can be resolved by going through this checklist. I have also clearly explained how to re-map the GPIO pins.

I have also created a video to help with the first communication project using DCAN: https://training.ti.com/getting-started-dcan-module. Please take a look.

If you are new to C2000, CCS etc, I suggest you first try a simple example like C:\ti\c2000\C2000Ware_5_01_00_00\driverlib\f2838x\examples\c28x\led. Once you understand the basic flow of running an example successfully, you can try the CAN example.

Consolidated CAN resource list: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1033069/faq-what-kind-of-resources-does-ti-provide-to-help-with-can-and-canfd

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TMDSCNCD28388D: eCAN configuration