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Merged
MaharavanSundaram merged 1 commit into from
Aug 28, 2025
Merged

BME690 v1.0.3 #5

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52 changes: 46 additions & 6 deletions bme69x.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (c) 2024 Bosch Sensortec GmbH. All rights reserved.
* Copyright (c) 2025 Bosch Sensortec GmbH. All rights reserved.
*
* BSD-3-Clause
*
Expand Down Expand Up @@ -31,8 +31,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*
* @file bme69x.c
* @date 2024-05-14
* @version v1.0.1
* @date 2025-07-15
* @version v1.0.3
*
*/

Expand Down Expand Up @@ -905,6 +905,17 @@ static uint32_t calc_humidity(uint16_t hum_adc, int16_t comp_temperature, const
2097152ULL) * dev->calib.par_h5 + 8192UL) / 16384UL);

var_H = var_H - (((((var_H / 32768UL) * (var_H / 32768UL)) / 128UL) * dev->calib.par_h6) / 16UL);

if (var_H < 0)
{
var_H = 0;
}

if (var_H > 419430400)
{
var_H = 419430400;
}

hum_comp = (uint32_t)(var_H / 4096UL);

return hum_comp;
Expand Down Expand Up @@ -1027,7 +1038,8 @@ static float calc_humidity(uint16_t hum_adc, float comp_temperature, const struc
double oh, tk10h, sh;
double tk1sh, tk2sh, hlin2;
double hoff, hsens;
double temp_comp, calc_hum, temp_var_1;
double temp_comp, calc_hum, hum_float_val;
int32_t hum_int_val;

temp_comp = (comp_temperature * 5120) - 76800;

Expand All @@ -1040,8 +1052,21 @@ static float calc_humidity(uint16_t hum_adc, float comp_temperature, const struc

hoff = (double)hum_adc - (oh + tk10h * temp_comp);
hsens = hoff * sh * (1 + (tk1sh * temp_comp) + (tk1sh * tk2sh * temp_comp * temp_comp));
temp_var_1 = hsens * (1 - hlin2 * hsens);
calc_hum = temp_var_1;
hum_float_val = hsens * (1 - hlin2 * hsens);

/* Avoid direct floating-point comparison by using integer scaling */
hum_int_val = (int32_t)(hum_float_val * 1000.0f);

if (hum_int_val >= 100000)
{
hum_float_val = 100.0;
}
else if (hum_int_val < 0)
{
hum_float_val = 0.0;
}

calc_hum = hum_float_val;

return (float)calc_hum;
}
Expand Down Expand Up @@ -1721,8 +1746,23 @@ static int8_t get_calib_data(struct bme69x_dev *dev)
/* Humidity related coefficients */
dev->calib.par_h5 =
(int16_t)(((int16_t)coeff_array[BME69X_IDX_S_H_MSB] << 4) | (coeff_array[BME69X_IDX_S_H_LSB] >> 4));

if (dev->calib.par_h5 > 2047)
{
/* Convert to negative value */
dev->calib.par_h5 = (int16_t)(dev->calib.par_h5 - 4096);
}

dev->calib.par_h1 =
(int16_t)(((int16_t)coeff_array[BME69X_IDX_O_H_MSB] << 4) | (coeff_array[BME69X_IDX_O_H_LSB] & 0x0F));

/* Check if the value is above 2047 */
if (dev->calib.par_h1 > 2047)
{
/* Convert to negative value */
dev->calib.par_h1 = (int16_t)(dev->calib.par_h1 - 4096);
}

dev->calib.par_h2 = (int8_t)coeff_array[BME69X_IDX_TK10H_C];
dev->calib.par_h4 = (int8_t)coeff_array[BME69X_IDX_par_h4];
dev->calib.par_h3 = (uint8_t)coeff_array[BME69X_IDX_par_h3];
Expand Down
6 changes: 3 additions & 3 deletions bme69x.h
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (c) 2024 Bosch Sensortec GmbH. All rights reserved.
* Copyright (c) 2025 Bosch Sensortec GmbH. All rights reserved.
*
* BSD-3-Clause
*
Expand Down Expand Up @@ -31,8 +31,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*
* @file bme69x.h
* @date 2024-05-14
* @version v1.0.1
* @date 2025-07-15
* @version v1.0.3
*
*/

Expand Down
6 changes: 3 additions & 3 deletions bme69x_defs.h
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (c) 2024 Bosch Sensortec GmbH. All rights reserved.
* Copyright (c) 2025 Bosch Sensortec GmbH. All rights reserved.
*
* BSD-3-Clause
*
Expand Down Expand Up @@ -31,8 +31,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*
* @file bme69x_defs.h
* @date 2024-05-14
* @version v1.0.1
* @date 2025-07-15
* @version v1.0.3
*
*/

Expand Down
2 changes: 1 addition & 1 deletion examples/common/common.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (C) 2024 Bosch Sensortec GmbH. All rights reserved.
* Copyright (C) 2025 Bosch Sensortec GmbH. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
Expand Down
2 changes: 1 addition & 1 deletion examples/common/common.h
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (C) 2024 Bosch Sensortec GmbH. All rights reserved.
* Copyright (C) 2025 Bosch Sensortec GmbH. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
Expand Down
4 changes: 2 additions & 2 deletions examples/forced_mode/forced_mode.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (C) 2024 Bosch Sensortec GmbH
* Copyright (C) 2025 Bosch Sensortec GmbH
*
* SPDX-License-Identifier: BSD-3-Clause
*
Expand Down Expand Up @@ -38,7 +38,7 @@ int main(void)
* For I2C : BME69X_I2C_INTF
* For SPI : BME69X_SPI_INTF
*/
rslt = bme69x_interface_init(&bme, BME69X_I2C_INTF);
rslt = bme69x_interface_init(&bme, BME69X_SPI_INTF);
bme69x_check_rslt("bme69x_interface_init", rslt);

rslt = bme69x_init(&bme);
Expand Down
2 changes: 1 addition & 1 deletion examples/parallel_mode/parallel_mode.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (C) 2024 Bosch Sensortec GmbH
* Copyright (C) 2025 Bosch Sensortec GmbH
*
* SPDX-License-Identifier: BSD-3-Clause
*
Expand Down
2 changes: 1 addition & 1 deletion examples/self_test/self_test.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (C) 2024 Bosch Sensortec GmbH
* Copyright (C) 2025 Bosch Sensortec GmbH
*
* SPDX-License-Identifier: BSD-3-Clause
*
Expand Down
4 changes: 2 additions & 2 deletions examples/sequential_mode/sequential_mode.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/**
* Copyright (C) 2024 Bosch Sensortec GmbH
* Copyright (C) 2025 Bosch Sensortec GmbH
*
* SPDX-License-Identifier: BSD-3-Clause
*
Expand Down Expand Up @@ -44,7 +44,7 @@ int main(void)
* For I2C : BME69X_I2C_INTF
* For SPI : BME69X_SPI_INTF
*/
rslt = bme69x_interface_init(&bme, BME69X_I2C_INTF);
rslt = bme69x_interface_init(&bme, BME69X_SPI_INTF);
bme69x_check_rslt("bme69x_interface_init", rslt);

rslt = bme69x_init(&bme);
Expand Down