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

[Spegs21]

I'm just trying to initialize with lis2dh12_init after setting everything set up and I'm getting:

<error> app: ERROR 536936356 [Unknown error code] at C:\SEGGER Embedded Studio for ARM Projects\Wireless_TCT_Device\main.c:203
PC at: 0x00000721
<error> app: End of error report

I have:

#define MAX_PENDING_TRANSACTIONS    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,32);
LIS2DH12_INSTANCE_DEF(m_lis2dh12,&m_nrf_twi_sensor,LIS2DH12_BASE_ADDRESS_HIGH);

int main()
{

    uint32_t err_code;
    
    nrf_drv_twi_config_t const config = {
       .scl                = 12,
       .sda                = 13,
       .frequency          = NRF_DRV_TWI_FREQ_100K,
       .interrupt_priority = APP_IRQ_PRIORITY_LOWEST,
       .clear_bus_init     = false
    };
    
    err_code = nrf_twi_mngr_init(&m_nrf_twi_mngr, &config);
    APP_ERROR_CHECK(err_code);
    
    err_code = nrf_twi_sensor_init(&m_nrf_twi_sensor);
    APP_ERROR_CHECK(err_code);
    
    err_code = lis2dh12_init(&m_lis2dh12);
    APP_ERROR_CHECK(&err_code);
    NRF_LOG_INFO("LIS2DH Init.");
    
}

[Edvin]

You are checking the address of err_code on line 27 in your snippet. It is obviously not 0, so APP_ERROR_CHECK(&err_code) stops the application. Remove the "&"  in APP_ERROR_CHECK(&err_code); and see if that helps.

 

BR,

Edvin

[Spegs21]

Whoops! That fixed it. I changed that for some reason looking at your above post. Before it was failing because I wasn't initiating twi_sensor.

Edit: Actually it worked because it programmed the DK instead of the external board which does't have the low frequency oscillator. Is it required for TWI?

Edit 2: Changed it to RC in SDK config and it worked. I'll take that as a yes to my question.