TMS320F28388D: TMS320F28388D

Jeff Pankau

Prodigy 20 points

Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

Hello,

Does anyone know if it is possible to send the EtherCAT SOF or EOF signal to a GPIO pin? Any help would be appreciated.

Regards,

Jeff

over 3 years ago

0 Kevin Allen18 over 3 years ago

TI__Mastermind 45606 points

Hi Jeff,

Section 31.2.9 'General Purpose Inputs and Outputs' of the F2838x TRM (SPRUII0) has this info.

The EoF signal has the direct functionality mentioned below to ECAT_outputs.

The SoF doesn't have this direct functionality, but it can be accessed using the CLB (i.e. route SoF to a CLB tile and then bring to a XBAR output).

Best,

Kevin

0 Jeff Pankau over 3 years ago in reply to Kevin Allen18

Prodigy 20 points

Kevin,

Thanks for the feedback. I did see the EOF frame but I am having issues configuring the processor for this functionality.

Regards,

Jeff

0 Kevin Allen18 over 3 years ago in reply to Jeff Pankau

TI__Mastermind 45606 points

Hi Jeff,

Jeff Pankau said:
I am having issues configuring the processor for this functionality.

By the above you mean configuring the device to bring the signal out of the device to a GPIO, correct? I will look into how you are meant to configure in SW if so.

Best,

Kevin

0 Jeff Pankau over 3 years ago in reply to Kevin Allen18

Prodigy 20 points

yes you are correct.

Thanks,

0 Kevin Allen18 over 3 years ago in reply to Jeff Pankau

TI__Mastermind 45606 points

Hi Jeff,

I believe the registers shown in the diagram below need to be configured to bring the EoF signal out to a GPIO, in addition to enabling a respective ESC_GPOn pin (like is done in 'f2838x_cpu1_allocate_ecat_to_cm' project).

There are driverLib functions & defines for configuring these registers in 'escss.c' and 'escss.h' files, such as ESCSS_enableGPOUT() function.

Best,

Kevin

+1 KARTHIKEYAN RAJAMANICKAM over 3 years ago in reply to Kevin Allen18

TI__Genius 11645 points

Hello Jeff, Kevin,

This path(shown above in Fig 31-12) is meant for PDI_GPO outputs to be directly sent out on to GPIO or synchronize the output with the occurrence of one of the selected signals like EOF or SYNC as programmed.

These signals ECAT_SOF and ECAT_EOF are connected to CLB (Configurable Logic Tile) Tile5 - 6 Global mux inputs. These can then be routed outside on to GPIO's via CLB O/P X-BAR.

Hope this is clear.

0 Jeff Pankau over 3 years ago in reply to KARTHIKEYAN RAJAMANICKAM

Prodigy 20 points

Thank you for clearing that up. I appreciate all of the help.

Regards,

Jeff

0 Chris Yorkey over 3 years ago in reply to Jeff Pankau

TI__Genius 16075 points

Thanks all for helping Jeff and others in this case who may be/have asked this same question before or in the future. In speaking with Jeff today, we both agree that what might be helpful in the future, is a certain C2000Ware CLB project example specifically for this use-case vs. the current internal IO CLB example that exists today. In fact, if this new CLB example project could utilize an internal counter or timer or PWM (instead of simply IO) that then brings it out to an external GPIO, that would be ideal. This would then follow the above graphic illustration noted by Kevin quite perfectly.

Just a thought...thanks again.

Regards,

Chris

0 Kevin Allen18 over 3 years ago in reply to Chris Yorkey

TI__Mastermind 45606 points

Thanks Chris, it's a good suggestion to demonstrate the usage/support in a SW example. For my own understanding, what is the reason / use-case for needing to bring-out the SoF and EoF signal to a device pin?

Chris Yorkey said:
In fact, if this new CLB example project could utilize an internal counter or timer or PWM (instead of simply IO) that then brings it out to an external GPIO, that would be ideal.

Can you elaborate on the above case as well for me? The SoF/EoF signal is not directly needed at a device pin, or something else?

Best,

Kevin

0 Jeff Pankau over 3 years ago in reply to Kevin Allen18

Prodigy 20 points

I added the EOF and SOF to the CLB and it is working. We are using these in conjunction with other signals to check timing. Thanks again for the help.

Regards,

Jeff

0 Kevin Allen18 over 3 years ago in reply to Jeff Pankau

TI__Mastermind 45606 points

Hi Jeff,

Good to hear and happy to help. Thanks for the update and additional info.

Best,

Kevin

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TMS320F28388D: TMS320F28388D