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DRA821U: Documentation clarification for DRA821

P B
Prodigy 130 points

Part Number: DRA821U
Other Parts Discussed in Thread: DRA821

Q1) Hi I'm trying to wrap my head around what documentation should I use?

I need documentation for DRA821.

From what I've found there is:

1) PSDK Linux documentation for J7200 -> software-dl.ti.com/.../index.html

2) PSDK RTOS documentation for J7200 -> https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-j7200/11_02_00_02/exports/docs/psdk_rtos/docs/user_guide/index.html

3) PSDK RTOS documentation points also to PDK documentation -> https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-j7200/11_02_00_02/exports/docs/pdk_j7200_11_02_00_15/docs/userguide/j7200/index_j7200.html

I somehow managed to find this documentation 4) https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/10_01_00_04/exports/docs/pdk_jacinto_10_01_00_25/docs/userguide/jacinto/modules/keywriter.html which seems to be PDK Jacinto documentation?

Seems kinda messy...especially when I compare 3 and 4 because they look kinda similar, however 3 lacks description of OTP Keywriter which can be found in 4 under Modules/OTP KEYWRITER

How can I find the lastest processor-sdk-rtos-jacinto7 documentation?? This is almost excatly the same as 3 but 3 is called PDK J7200 and 4 is called PDK Jacinto

Tbh I have no idea what documentation should I browse through except for the 1 and 2. 

Q2) What is the difference between 

- J721S2 
- J784S4
- J742S2
- J722S

I mean is any of them = DRA821?

  • 0
    TI__Guru*** 131001 points

    Hi,

    Not clear on what the end goal is so will respond in general.

    • At a high level J7200 / DRA821 can be used interchangeably.   This is a device within the Jacinto family.

    Links to devices in the Jacinto family are below

    For each device, the PSDK RTOS software would be used R5 and C7x cores.   PSDK Linux, PSDK QNX or other HLOS software would be used on the ARM A53/A72 cores.

    The product browser on ti.com can be used for device comparison.

    Regards,

    kb

  • +1 in reply to KB
    TI__Guru** 123695 points

    Hi P B,

    KB said:
    At a high level J7200 / DRA821 can be used interchangeably.   This is a device within the Jacinto family.

    The TI SDKs provide s/w for the superset parts which all follow the J7xxx naming convention. You can see this in the individual Product DataSheet Device Nomenclature sections.

    So, the SDKs that can be used with DRA821 are all listed under PROCESSOR-SDK-J7200 Software development kit (SDK) | TI.com.

    I also recommend that you take a look through the Jacinto 7 Training Videos, especially the Processors Software Overview section to get a high-level overview of the Software SDKs.

    P B said:
    From what I've found there is:

    I am guessing you found these links from google. Google seach indexes some of the older SDK links by default. Please follow the relevant Processor SDKs from the above link, that will list each of the SDKs, and their corresponding documentation.

    11.2 SDK is the latest SDK, and we will be releasing a 11.2.1 Maintainance SDK Release at the end of this month. I recommend that you start with either of these SDKs.

    P B said:
    How can I find the lastest processor-sdk-rtos-jacinto7 documentation?? This is almost excatly the same as 3 but 3 is called PDK J7200 and 4 is called PDK Jacinto

    The link in #3 is indeed the latest J7200 RTOS SDK documentation for the PDK component. PDK is the base driver level component within the overall RTOS SDK. The link #4 is the equivalent PDK documentation for J721E SoC, which is the first J7 or TDA4 SoC.

    P B said:
    especially when I compare 3 and 4 because they look kinda similar, however 3 lacks description of OTP Keywriter which can be found in 4 under Modules/OTP KEYWRITER

    The same Keywriter documentation in #4 can scale for #3 for J7200 as well. It is currently missing from #3 due to some packaging issues, but the KeyWriter application applies for J7200/DRA821 as well. You can leverage this if you are interested in the KeyWriter application documentation. 

    Hope this helps you with the understanding of our SDKs.

    regards

    Suman