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CC2340R5: SRAM & AES

Ryan Li
Intellectual 480 points
Part Number: CC2340R5
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

CCS version : 12.7.0.00007

SDK version : simplelink_lowpower_f3_sdk_7_40_00_64

project : basic_ble_LP_EM_CC2340R5_freertos_ticlang

1. I found that loading the basic_ble_LP_EM_CC2340R5_freertos_ticlang project occupies 33KB of the 36KB in SRAM. From sysconfig, I can see that the default heap is 0x5000, which is 20KB. Is it possible to reduce the SRAM space? Or the heap must be set Is it set to 0x5000? If the heap is set lower, will there be insufficient space?

2. Using the basic_ble_LP_EM_CC2340R5_freertos_ticlang project, sysconfig will preset three encryption methods: AESCCM, AESCTRDBG, and AESECB. However, I currently do not use these three encryption methods. After removing them directly, the compilation will display an Error. How can I successfully migrate? Except these three encryption methods

  • 0
    TI__Mastermind 42070 points

    Hi,

    Thank you for reaching out. We will look into this and get back to you as soon as possible. in the meantime, can you verify if the same encryption behavior is seen on 8.10?

    Best Regards,

    Jan

  • 0 in reply to Jan
    Intellectual 480 points

    The basic_ble_LP_EM_CC2340R5_freertos_ticlang project using 8.10.01.02 will also default to these three encryption methods, and it still cannot be compiled after being removed.

  • 0 in reply to Jan
    Intellectual 480 points

    Regarding the first point I mentioned in the article, whether the heap size of SRAM can be reduced, please give me an test result. Thank you.

  • +1 in reply to Ryan Li
    TI__Genius 15535 points

    Hello Ryan,

    1. The basic_ble example comes with a predefined amount of heap size which can be of course reduced and tuned out based on your application actual requirements. Please find the field to modified it inside SysConfig -> FreeRTOS -> Heap Size. I would suggest to use Runtime Object Viewer where you can see the peak heap mem consumption during runtime. Please take a look at this material: Debugging Common Heap Issues.
    2. The basic_ble example has several dependencies on these drivers which provide functionalities required by the Bluetooth spec. In other words, if you remove the AESCCM, AESECB, AESCTRDRBG, from the SysConfig, the stack will still looking for the symbols related to these and link will fail.

    BR,

    David.

  • 0 in reply to David
    Intellectual 480 points

    OK , thanks