TMS570LC4357: Flexray Communication End of Communication Cycle CTR Update

Robert Liu97

Part Number: TMS570LC4357

Hello TI Team,

I have been able to setup all my communication parameters to allow successful communication over Flexray. However I am having trouble implementing a counter in my flexray message. At the end of each communication cycle I would like to increment a 0 to 15 counter and transmit it in a flexray message. However I don't know what is the best way to do this simple task with flexray. In my function transmit_check_node_b(FRAY_ST *Fray_PST) I try to increment the counter at the end of the cycle communication cycle.

However it looks like my counter has now incremented twice before a transmission and it also looks like the Fray_PST->MTCCV_UN.MTCCV_ST.ccv_B6 (cycle communication counter) increments by 2.

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/908/8551.InverterBoot.7z

over 8 years ago

0 Chuck Davenport over 8 years ago

TI__Guru 59540 points

Hello Robert,

I am forwarding your question to our FlexRay expert. Unfortunately, he is on business travel until next week. Is it OK if he responds once he returns to the office early next week?

0 Robert Liu97 over 8 years ago in reply to Chuck Davenport

Intellectual 450 points

Thanks for the response Chuck. I look forward to hearing from your flexray expert.

0 Chuck Davenport over 8 years ago in reply to Robert Liu97

TI__Guru 59540 points

Robert,

Again, I apologize for the delay. The FlexRay expert is returning to the office tomorrow and should be able to address your question soon after his return.

0 Robert Liu97 over 8 years ago in reply to Chuck Davenport

Intellectual 450 points

In preparation for the Flexray expert i've been trying to look at the different configuration registers for flexray to determine how to increment the counter. In the TRM it talks about a TXI Transmit interrupt and Cycle start interrupt CYCS flags. This looks like it could be useful information to have a ISR monitoring these flags and increment the payload counter (0 to 15). But when i try to set up a RTI interrupt to periodically monitor these flags it seems flexray stops working. Possibility flexray is already using some of these RTI counters.

0 Robert Liu97 over 8 years ago in reply to Robert Liu97

Intellectual 450 points

Hello Chuck. I apologize for asking but has your flexray expert had a chance to look at this issue? I understand he just got back from his trip.

0 Chuck Davenport over 8 years ago in reply to Robert Liu97

TI__Guru 59540 points

Hello Robert,

My apologies for the delay. I have pinged him again.

0 Robert Liu97 over 8 years ago in reply to Chuck Davenport

Intellectual 450 points

Hello Chuck. Has your flexray expert had the opportunity to take a look at this yet?

0 QJ Wang over 8 years ago in reply to Robert Liu97

TI__Guru**** 196346 points

Hello Robert,

You can use the feature of cycle counter filtering to TX and RX the frame. If the cycle code is 0x1cccc, the interrupt TI0 is generated every 16 cycles.

Regards,

Arm-based microcontrollers

Arm-based microcontrollers forum

TMS570LC4357: Flexray Communication End of Communication Cycle CTR Update