BME688 no new data found

Rosso9 · ‎04-13-2022

HI,

I'm using BME688 breakout board sensor with nRF52832 microcontroller. They communicate through I2C protocol.

For the moment, I do not want ot use the BSEC library, I want to read the datas of Temperature, Pressure and Humidity and gas.

I downloaded the API from github and I modified the common.c file to adapt to my microcontroller in this way

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "bme68x.h"
#include "bme68x_defs.h"
#include "common.h"
#include "nrf_drv_twi.h"
#include "nrf_delay.h"


/******************************************************************************/
/*!                 Macro definitions                                         */
/*! BME68X shuttle board ID */
#define BME68X_SHUTTLE_ID  0x93
#define SDA_PIN 18
#define SCL_PIN 19
/******************************************************************************/
/*!                Static variable definition                                 */
static uint8_t dev_addr;
static const nrf_drv_twi_t i2c_instance = NRF_DRV_TWI_INSTANCE(0);


/******************************************************************************/
/*!                User interface functions                                   */

/*!
 * I2C read function map to COINES platform
 */

BME68X_INTF_RET_TYPE bme68x_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, void *intf_ptr)
{

    uint8_t dev_addr = *(uint8_t*)intf_ptr; 
    ret_code_t ret_code;
    ret_code = nrf_drv_twi_tx(&i2c_instance, dev_addr, &reg_addr,1,false);
    if(ret_code != NRF_SUCCESS)
    {
        return ret_code;
    }

    ret_code = nrf_drv_twi_rx(&i2c_instance, dev_addr, reg_data, len);
    if (ret_code == NRF_SUCCESS) 
        return BME68X_OK;
    else 
        return 1;
}


/*!
 * I2C write function map to COINES platform
 */
BME68X_INTF_RET_TYPE bme68x_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t len, void *intf_ptr)
{

    uint8_t dev_addr = *(uint8_t*)intf_ptr;
    ret_code_t ret_code;
    uint8_t send_tmp[10] = {0};
    send_tmp[0] = reg_addr;
    memcpy(send_tmp+1, reg_data, len);
    ret_code_t err_code = nrf_drv_twi_tx(&i2c_instance, dev_addr, send_tmp, len, false);
    if (ret_code == NRF_SUCCESS) return BME68X_OK;
    else return 1;
}


/*!
 * Delay function map to COINES platform
 */
void bme68x_delay_us(uint32_t period, void *intf_ptr)
{
    nrf_delay_us(period);
}


int8_t bme68x_interface_init(struct bme68x_dev *bme, uint8_t intf)
{
    int8_t rslt = BME68X_OK;
    uint8_t reg_addr; 
    const uint8_t *reg_data;
    uint32_t len;
    void *intf_ptr;

    if (bme != NULL)
    {
        /* Bus configuration : I2C */
        if (intf == BME68X_I2C_INTF)
        {
            dev_addr = BME68X_I2C_ADDR_LOW;
            bme->read = bme68x_i2c_read;
            bme->write = bme68x_i2c_write;
            bme->intf = BME68X_I2C_INTF;
            //coines_config_i2c_bus(COINES_I2C_BUS_0, COINES_I2C_STANDARD_MODE);
           /* const nrf_drv_twi_config_t i2c_instance_config = {  .scl = SCL_PIN,
                                                                .sda = SDA_PIN,
                                                                .frequency = NRF_TWI_FREQ_100K,
                                                                .interrupt_priority = 0};
            rslt = nrf_drv_twi_init(&i2c_instance, &i2c_instance_config, NULL, NULL);
            //enable TWI instance
            nrf_drv_twi_enable(&i2c_instance);
    */
        }
        //coines_set_shuttleboard_vdd_vddio_config(3300, 3300);
        nrf_delay_ms(100);
        bme->delay_us = bme68x_delay_us;
        bme->intf_ptr = &dev_addr;
        bme->amb_temp = 25; /* The ambient temperature in deg C is used for defining the heater temperature */
    }
    else
    {
        rslt = BME68X_E_NULL_PTR;
    }

    return rslt;
}


void bme68x_check_rslt(const char api_name[], int8_t rslt)
{
    switch (rslt)
    {
        case BME68X_OK:
            printf("API name [%s]: Tutto ok\n", api_name);
            /* Do nothing */
            break;
        case BME68X_E_NULL_PTR:
            printf("API name [%s]  Error [%d] : Null pointer\r\n", api_name, rslt);
            break;
        case BME68X_E_COM_FAIL:
            printf("API name [%s]  Error [%d] : Communication failure\r\n", api_name, rslt);
            break;
        case BME68X_E_INVALID_LENGTH:
            printf("API name [%s]  Error [%d] : Incorrect length parameter\r\n", api_name, rslt);
            break;
        case BME68X_E_DEV_NOT_FOUND:
            printf("API name [%s]  Error [%d] : Device not found\r\n", api_name, rslt);
            break;
        case BME68X_E_SELF_TEST:
            printf("API name [%s]  Error [%d] : Self test error\r\n", api_name, rslt);
            break;
        case BME68X_W_NO_NEW_DATA:
            printf("API name [%s]  Warning [%d] : No new data found\r\n", api_name, rslt);
            break;
        default:
            printf("API name [%s]  Error [%d] : Unknown error code\r\n", api_name, rslt);
            break;
    }
}

/*
void bme68x_coines_deinit(void)
{
    fflush(stdout);

    coines_set_shuttleboard_vdd_vddio_config(0, 0);
    coines_delay_msec(1000);

    // Coines interface reset
    coines_soft_reset();
    coines_delay_msec(1000);
    coines_close_comm_intf(COINES_COMM_INTF_USB);
}
*/

Then, I try the example of forced mode

struct bme68x_dev bme;
    int8_t rslt;
    struct bme68x_conf conf;
    struct bme68x_heatr_conf heatr_conf;
    struct bme68x_data data;
    uint32_t del_period;
    uint32_t time_ms = 0;
    uint8_t n_fields;
    uint16_t sample_count = 1;

    /* Interface preference is updated as a parameter
     * For I2C : BME68X_I2C_INTF
     * For SPI : BME68X_SPI_INTF
     */
    rslt = bme68x_interface_init(&bme, BME68X_I2C_INTF);
    bme68x_check_rslt("bme68x_interface_init", rslt);

    rslt = bme68x_init(&bme);
    bme68x_check_rslt("bme68x_init", rslt);

    /* Check if rslt == BME68X_OK, report or handle if otherwise */
    conf.filter = BME68X_FILTER_OFF;
    conf.odr = BME68X_ODR_NONE;
    conf.os_hum = BME68X_OS_16X;
    conf.os_pres = BME68X_OS_1X;
    conf.os_temp = BME68X_OS_2X;
    rslt = bme68x_set_conf(&conf, &bme);
    bme68x_check_rslt("bme68x_set_conf", rslt);

    /* Check if rslt == BME68X_OK, report or handle if otherwise */
    heatr_conf.enable = BME68X_ENABLE;
    heatr_conf.heatr_temp = 300;
    heatr_conf.heatr_dur = 100;
    rslt = bme68x_set_heatr_conf(BME68X_FORCED_MODE, &heatr_conf, &bme);
    bme68x_check_rslt("bme68x_set_heatr_conf", rslt);

    printf("Sample, TimeStamp(ms), Temperature(deg C), Pressure(Pa), Humidity(%%), Gas resistance(ohm), Status\n");

    while (sample_count <= SAMPLE_COUNT)
    {
        rslt = bme68x_set_op_mode(BME68X_FORCED_MODE, &bme);
        bme68x_check_rslt("bme68x_set_op_mode", rslt);

        /* Calculate delay period in microseconds */
        del_period = bme68x_get_meas_dur(BME68X_FORCED_MODE, &conf, &bme) + (heatr_conf.heatr_dur * 1000);
        bme.delay_us(del_period, bme.intf_ptr);

        time_ms = count*50;

        /* Check if rslt == BME68X_OK, report or handle if otherwise */
        rslt = bme68x_get_data(BME68X_FORCED_MODE, &data, &n_fields, &bme);
        bme68x_check_rslt("bme68x_get_data", rslt);

        if (n_fields)
        {
#ifdef BME68X_USE_FPU
            printf("%u, %lu, %.2f, %.2f, %.2f, %.2f, 0x%x\n",
                   sample_count,
                   (long unsigned int)time_ms,
                   data.temperature,
                   data.pressure,
                   data.humidity,
                   data.gas_resistance,
                   data.status);
#else
            printf("%u, %lu, %d, %lu, %lu, %lu, 0x%x\n",
                   sample_count,
                   (long unsigned int)time_ms,
                   (data.temperature / 100),
                   (long unsigned int)data.pressure,
                   (long unsigned int)(data.humidity / 1000),
                   (long unsigned int)data.gas_resistance,
                   data.status);
#endif
            sample_count++;
        }
    }

It seems all rigth, I build and the code does not gave any error, but the output is this:

API name [bme68x_interface_init]: Tutto ok
API name [bme68x_init]: Tutto ok
API name [bme68x_set_conf]: Tutto ok
API name [bme68x_set_heatr_conf]: Tutto ok
Sample, TimeStamp(ms), Temperature(deg C), Pressure(Pa), Humidity(%), Gas resistance(ohm), Status
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found
API name [bme68x_set_op_mode]: Tutto ok
API name [bme68x_get_data] Warning [2] : No new data found (and it continues with no new data)

I try to wait a lot, but the result does not change. I do not understand where the problem is. What can I do to solve the problem?

Is it possible that the sensor is damaged? In that case, how can I understand it?

Thanks for the help

BSTRobin · ‎04-14-2022

Hi Rosso9,

You could refer attached example code on STM32, compare with your code and run it again.

Rosso9 · ‎04-14-2022

Hi, thanks.

Where can I find these examples?

BSTRobin · ‎04-15-2022

Sorry, I forget to upload attachment.

You could get it now.

Rosso9 · ‎04-21-2022

Hi,

I have looked at the example and I think my functions are quite similar, but the code gives back the same error: no new data found.

I attach my common.c file, if you could give it a look. I use I2C communication (in the function, I use the 7 bit address because the microcontroller wants the 7 bit address).

Thanks

BME688 no new data found

BME688 no new data found

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