LIS2DH12 driver issue in nRF SDK v15.0

[aaronxu]

Hi,

There are several new drivers under "nRF5_SDK_15.0.0_a53641a\components\drivers_ext\", but no example now.

I have setup the HTS221 driver and it works. I turn to LIS2DH12 driver, but it not work.

For send and receive more i2c data then HTS221, I change some Marco like this:

#define MAX_PENDING_TRANSACTIONS    33

#define LIS2DH12_MIN_QUEUE_SIZE       32

And read who_am_i successfully.

when try to read accelerate data, it stuck in somewhere, where I cannot traced.

Could you kindly share with me a example, which is using the new LIS2DH12 driver?

[lhochstetter]

Hi aaronxu ,

I'm too trying to setup the LIS2DH12 driver to read out the WHO_AM_I register. I've adapted the twi_sensor example code according to my needs and your code snippets. Due to some previous issues when compiling I used the sdk_config.h from the twi_master_using_nrf_twi_mngr example.

When I run the attached code the application starts, runs to the "Here." debug print, crashes and resets to continue in an endless cycle.

Would you mind sharing a minimal example on how to read out the WHO_AM_I register using the drivers or point me in a general direction to keep searching?

/* TWI instance ID. */
#define TWI_INSTANCE_ID             0
#define MAX_PENDING_TRANSACTIONS    33
#define LIS2DH12_MIN_QUEUE_SIZE     32

NRF_TWI_MNGR_DEF(m_nrf_twi_mngr, MAX_PENDING_TRANSACTIONS, TWI_INSTANCE_ID);
NRF_TWI_SENSOR_DEF(m_nrf_twi_sensor, &m_nrf_twi_mngr, LIS2DH12_MIN_QUEUE_SIZE);
LIS2DH12_INSTANCE_DEF(m_lis2dh12, &m_nrf_twi_sensor, LIS2DH12_BASE_ADDRESS_HIGH);

static uint8_t m_sample = 0;

void print_identity(ret_code_t r, void *p_register_data)
{
    NRF_LOG_INFO("Identity: %d", *((uint8_t *)p_register_data));
}

/**
 * @brief Function for main application entry.
 */
int main(void)
{
    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
    NRF_LOG_DEFAULT_BACKENDS_INIT();

    NRF_LOG_INFO("TWI sensor example started.");
    NRF_LOG_FLUSH();

    ret_code_t err = lis2dh12_init(&m_lis2dh12);
    NRF_LOG_INFO("Here.");
    NRF_LOG_FLUSH();
    APP_ERROR_CHECK(err);
    while (true)
    {
        nrf_delay_ms(500);
        err = lis2dh12_who_am_i_read(&m_lis2dh12, print_identity, &m_sample);
        APP_ERROR_CHECK(err);
        NRF_LOG_FLUSH();
    }
}

[Edvin]

Maybe you could check the err from :

ret_code_t err = lis2dh12_init(&m_lis2dh12);

What is it?

 

BR,

Edvin

[lydie]

Hi, 

how do you know the sensor instance name (m_lis2dh12)? I try the same code and I have an error:

macro names must be identifiers

in lis2dh12.h

Thanks!

[awneil]

lydie said:

how do you know the sensor instance name (m_lis2dh12)?

because you define it:

LIS2DH12_INSTANCE_DEF( m_lis2dh12, &m_nrf_twi_sensor, LIS2DH12_BASE_ADDRESS_HIGH );

lydie said:

I have an error

lydie said:

macro names must be identifiers

Where, exactly, do you get that?

Post the full message: copy it, and paste as for source code, but leave the 'Language' as 'Text' - ie, just steps 1 & 2:

[lydie]

It's ok, it works. But what is the expected result of who_am_i read and the function print_identity with this line:

NRF_LOG_INFO("Identity: %d", *((uint8_t *)p_register_data)); 

[lhochstetter]

Hi lydie,

checkout the LIS2DH12 datasheet p.31: https://www.st.com/resource/en/datasheet/lis2dh12.pdf

The expected result is 51 (hex 33, bin 00110011).

EDIT 2019/07/27

"According to" Mouser https://eu.mouser.com/ProductDetail/STMicroelectronics/LIS2DH12?qs=yXzv9R%2FF42Ia01kPyHCTbw==  the LIS2DH12 and a couple other sensors are EOL (https://www.mouser.com/PCN/STMicroelectronics_9055.pdf). Depending on your needs you might need to find a suitable replacement.

Looks like I spoke too soon: according to ST https://www.st.com/en/mems-and-sensors/lis2dh12.html the LIS2DH12 is still active ...

/EDIT

Regards

lhochstetter

[Nats]

Hey, i tried the same program, and i can't enter the print_identity function. The loop executes continuously, but except the twi started message , nothing else is printed