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CC2564B BSC_Initialize Failed:-4 Occasionally, The probability is about 1%

user1653973
Intellectual 320 points

Other Parts Discussed in Thread: CC2564

Hi：

My platform is EFM32GG395+CC2564B， when do cycle BT initialization test，we could get the failure result occasionally

OpenStack().
BSC_Initialize Failed: -4.
Unable to open the stack.

Now 2564B is configured as mix mode，Slow_Clk is from EFM32 output，not from a 32.768K TCXO，the ripple on 1V8 is 120mV，

1、 I want to check which may cause this failure，ripple，slow_clk or any other

2、 can you tell me the detail work in BSC_Initialize (), so I can trace failure process

  • 0
    TI__Mastermind 23565 points
    Hi,

    I would recommend verifying the power up sequence first. processors.wiki.ti.com/.../CC256x_Testing_Guide

    The BSC_Initialize tries to load the service pack to the CC256x controller. If the controller is not up, then this function will fail.

    Regards,
    Miguel
  • 0 in reply to Miguel
    Prodigy 20 points
    Hi，
    I made some verification and found out that Slow_Clk from EFM32 is the point，now I added a external TCXO as slow clk
    I measured the power consumption(broadcasting ，connection and transmission) ， found that the current in DCDC mode is almost same as mixmode and sometimes bigger ，it is not consistent with datasheet. Did TI has the current consumption in three power schemes?
  • 0 in reply to 洪 沈
    Intellectual 800 points

    Hi Miguel

    This looks a very similar problem to the one I am seeing (details in my other posts) , do you agree ?

  • 0 in reply to Jonathan Capless
    TI__Mastermind 23565 points
    Hi Jonathan,

    I am not sure it is the same issue since I believe your are able to boot up the device but not able to enable BLE.

    Miguel
  • 0 in reply to 洪 沈
    TI__Mastermind 23565 points
    Hi user4542775,

    Where did you measure the current consumption? Which scenarios? Which DC2DC part are you using?

    Regards,
    ~Miguel
  • 0 in reply to Miguel
    Intellectual 800 points

    Hi Miguel

    I see exactly the same fault initially.

    OpenStack().
    BSC_Initialize Failed: -4.
    Unable to open the stack.

    After that the stack initialises ok ( BUT only using the basepatch that came with the stack will low energy enable succesfully ).

    If I use the patch that TI say to use LE does not initialise.

    I gave double checked the UART coms and whenever the stack sends UART commands they are sent to the chip and whenever UART messages are recieved the stack gets notified of them ... BUT there are 'command disallowed' messaged been sent by the CC2564B

    Is it possible to have a TI field engineer visit our site to look at the problems ? I am in the UK near Bradford.

  • 0 in reply to Miguel
    Prodigy 20 points

    Dear  Miguel:

                Through contrast test，the problem lies in the  unstability of 32768 output from EFM32

                Because  the rising  edge has left  and right offset,    If the rising edge begins as the clock cycle，the frequency  is not  stable

                But  if we use  falling edge as start of a clock cycle ，the frequency is Ok

               So  I want  to check which edge is the start of a clock  for CC2564