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    Cannot get chip ID BHA260

    Cannot get chip ID BHA260

    Minh
    New Poster

    Hi,

    I'm trying to communicate nrF52832 and  BHA260AB shuttle board but I cannot get the chip ID. I checked with the logic analyzer and saw the ACK is returned. 

    Minh_0-1635927327126.png

    this is I2C read function:

    int8_t twi_read(uint8_t sl_addr, uint8_t reg_addr, uint8_t* output, uint8_t len)
    {
    ret_code_t err_code;

    err_code = nrf_drv_twi_tx(&m_twi, sl_addr, &reg_addr, 1, false);
    APP_ERROR_CHECK(err_code);

    nrf_delay_us(300); //not work if no delay
    NRF_LOG_FLUSH();

    err_code = nrf_drv_twi_rx(&m_twi, sl_addr, output, len);
    APP_ERROR_CHECK(err_code);

    nrf_delay_us(500); //delay to wait for the response

    if(rx_done)
    return 0;
    else
    return -1;
    }

    Please tell me what is the problem here? thanks.

     

    15 REPLIES 15

    Hi  BSTRobin,

    sorry, I re-check my hardware setup the HSDO pin connected to the ground. Thanks for your code. I will re-check again my source code.

    BSTRobin
    Community Moderator
    Community Moderator

    Hello Minh,

    Follow previously discussed HW & SW operations , it will work.

    Hi BSTRobin,

    Sorry for the late feedback. I found the reason.

    BHA260 auto goto sleep after power-up if no action and very quick:

    Minh_0-1636625145038.pngMinh_1-1636625169760.png

    you can refer to datasheet page 37.

    My question: how to keep BHA260 chip set in the ACTV mode after power up?

    thanks

    BSTRobin
    Community Moderator
    Community Moderator

    Hello Minh,

    Do you mean that the failure to read the chip ID has anything to do with this?

    After power on, you can allow access to the chip ID register as you have saw our I2C waveform capture.

    Hi BSTRobin,

    can read chip ID at the first time BHA260 power up like the picture below.

    Minh_0-1636690501319.png

    then if there is no action the BHA260 chipset will go to sleep and I cannot read the chip ID again.

    That is my conclusion when I read the datasheet on page 37.

    Minh_1-1636690748369.png

    Thanks

     

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