Timestamp with can_message.h is not working

[TGIRA.1]

I try to use the timestamp function from can_message.h to know the timestamp of a message received on the CAN.

But the value is every time 0. Is it a knowed bug?

Because I use this function with another hardware without problem.

With STM32 I'm not able to see an error when a can message is not received by the MCU

Thank you

[YS.K]

The STM32 CAN controllers has timestamp register. in STM32 bxCAN reference manual, this one has a register.

Check out CAN_RDTxR. It has timestamp field.

This field contains the 16-bit timer value captured at the SOF detection.

​

Each mailbox will have all info (ID, Data, Timestamp, Error count etc) related to that message.

​

Timestamp mode is enabled when the next bit is set to 1 in Initialization.

CAN_MCR register

TTCM (Time Triggered Communication Mode) bit

​

[TGIRA.1]

Thank you for your response,

But I don't know how to make it working in Simulink.

I tried to enable the TTCM in cubeMX on CAN1 with no more success

In simulink I use interupt to receive CAN message and in the toolbox CAN_read_Data I checked Output CAN_MESSAGE type like that I can use CAN_unpack with .dbc file to read my can message.

On the CAN_unpack toolbox I check the option output timestamp and I have a timastamp output from CAN_unpack. But the timastamp value is every time 0...

I use this toolbox with another hardware (Speedgoat) and the timestamp output work perfectly.

I don't know if it can work on simulink and I just don't know how to make it worked, or if it's a real problem.

Do you know how I can set it to make it work?

Thanks