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?

[aaronxu]

More information here:

Define and configuration:

#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_LOW);


...

    LIS2DH12_DATA_CFG(m_lis2dh12, LIS2DH12_ODR_100HZ, false, 1, 1, 1, LIS2DH12_SCALE_2G, 1);
    LIS2DH12_FIFO_CFG(m_lis2dh12, false, LIS2DH12_BYPASS, false, 0x00);

    err_code = lis2dh12_init(&m_lis2dh12);
    APP_ERROR_CHECK(err_code);

...

after that,

lis2dh12_data_read(&m_lis2dh12, lis2dh12_data_read_cb, &accel_data, sizeof(accel_data));

[aaronxu]

New commit:

I found the reason of this Hard fault is that, I use 

lis2dh12_data_read(&m_lis2dh12, lis2dh12_data_read_cb, &accel_data, sizeof(accel_data));

but the last parameter was multi by 6 inside lis2dh12 driver, so it's bigger than LIS2DH12_MIN_QUEUE_SIZE.

So I change is to 1 and it work.

But I still have question, How big can I set the "LIS2DH12_MIN_QUEUE_SIZE". And do I need to set MAX_PENDING_TRANSACTIONS bigger than LIS2DH12_MIN_QUEUE_SIZE?

[Edvin]

Hello,

I am sorry for the late reply.

I don't have a LIS2DH sensor to test any of this on, but the parameters: LIS2DH12_MIN_QUEUE_SIZE and MAX_PENDING_TRANSACTIONS means the following in the application:

NRF_TWI_MNGR_DEF(..., MAX_PENDING_TRANSACTIONS, ...)

The second parameter of NRF_TWI_MNGR_DEF(...) is the size of the transaction queue. See NRF_TWI_MNGR_DEF() on infocenter.

 

NRF_TWI_SENSOR_DEF(..., ..., LIS2DH12_MIN_QUEUE_SIZE)

The third parameter of NRF_TWI_SENSOR_DEF(...) is the buffer size of the TWI communication for that sensor. See NRF_TWI_SENSOR_DEF() on infocenter.

 

Again, I haven't got any LIS2DH sensor to test this on, so I haven't tested this driver before. But I suppose that the sensor def is the queue of a single transaction in bytes, while the TWI_MNGR_DEF is the max number of pending transactions.

 

Best regards,

Edvin

[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