TMDSIDK437X: PRU : HDSL in SYNC Mode and Long Message access

Alan Ismail

Part Number: TMDSIDK437X

Hello

I am evaluation PRU-ICSS-Industrial protocol's implementation especially Hiperface DSL ( HDSL). I have several questions about the implementation.

1) In the sample code C:\ti\PRU-ICSS-Industrial_Drives_01.00.02.03\examples\hdsl_diagnostic\hdsl_app.c

Line 1465: hdslInterface->SYNC_CTRL = 1;

SYNC_CTRL = 1, indicates HDSL Master is configured to be in SYNC Mode. May I know to which SIGNAL/GPIO the HDSL Master is being synchronized with.

2) Does the HDSL Master works with other values for hdslInterface->SYNC_CTRL ie hdslInterface->SYNC_CTRL = 4

3 ) What is the latency between the SYNC signal to the Position data at PRU interface

4) Does the HDSL Master supports long message access

5) Do you have a code sample for long message access

Thanks you

Alan I

over 4 years ago

0 Garrett Ding over 4 years ago

TI__Mastermind 43296 points

Hi Alan,

I will follow up with my colleague to answer your questions shortly.

Regards,
Garrett

0 Alan Ismail over 4 years ago in reply to Garrett Ding

Intellectual 385 points

Hi Garrett

Thank you for following up on my questions. I have one additional question on this topic. Is the HDSL IP supported in PRU is the safety version of the HDSL IP?

https://www.sick.com/media/docs/8/08/608/Technical_information_HIPERFACE_DSL_SAFETY_Safety_Implementation_en_IM0056608.PDF

Thanks

Alan

0 Vishwanath Reddy over 4 years ago

TI__Mastermind 19365 points

Hi Alan,

My answers:

1. HDSL Master on AM437x does not support SYNC mode. Please refer .

2. Refer point 1.

3. Refer point 1.

For 4 and 5, I will come back in couple of days.

0 Vishwanath Reddy over 4 years ago in reply to Alan Ismail

TI__Mastermind 19365 points

Hi Alan,

No, HDSL IP in PRU does not support safety.

0 Alan Ismail over 4 years ago in reply to Vishwanath Reddy

Intellectual 385 points

Hello Vishwanath

Thank you for the update.

1a- Since current HDSL Master on AM437x does not support SYNC. May I know the HDSL Master Position Update period.

6- Is there a plan for SYNC and Safety support on HDSL Master on AM437x on future releases? If it is, may I know estimated time line

Thanks

Alan I

0 Vishwanath Reddy over 4 years ago in reply to Alan Ismail

TI__Mastermind 19365 points

Alan,

Sorry for later reply. I was out of office for some time

4. HDSL Master does not support long message access.

5. We do not have sample code for long message access as we do not have support for long message access.

1a. The HDSL frames are transmitted as fast as possible with just 1 stuffing pattern in between. So fast position update time is 1 frame length and safe position update time is 8 frame lengths.(1 frame length ~ 11.52us)

6. As of now, we do not have plan for SYNC and safety support for HDSL Master on AM437x. We will have SYNC support for AM65x in Jan'2021.

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TMDSIDK437X: PRU : HDSL in SYNC Mode and Long Message access