BME690 datasheet(24/60 Pages) BOSCH

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Bosch Sensortec | BME690 - Datasheet

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Document number: BST-BME690-DS001-04

as well as in the event of applications for industrial property rights

Using the variables listed in

Table 14 the following code will calculate the compensated pressure value (in Pascal). It is, however, recommended to use

the sensor API available on github for a friendlier user experience.

Floating:

double partial_data1

double partial_data2

double partial_data3

double partial_data4

double partial_out1

double partial_out2

press_adc =(double)(press_adc / 2^(-4));

partial_data1 = (double)(par_p2/2^6 * t_lin);

partial_data2 = (double)(par_p3/2^8 * t_lin * t_lin);

partial_data3 = (double)(par_p4/2^15 * t_lin * t_lin * t_lin);

partial_out1 = (double)(par_p1/2^(-3) + partial_data1 + partial_data2 + paratial_data3);

partial_data1 = (double)((par_p6-2^14)/2^29 * t_lin);

partial_data2 = (double)(par_p7/2^32 * t_lin * t_lin);

partial_data3 = (double)(par_p8/2^37 * t_lin * t_lin * t_lin);

partial_out2 = (double)(press_adc * ((par_p5-2^14)/2^20 + partial_data1 + partial_data2 + paratial_data3));

partial_data1 = (double)(press_adc) * (double)(press_adc);

partial_data2 = par_p9/2^48 + par_p10/2^48 * t_lin;

partial_data3 = partial_data1 * partial_data2;

partial_data4 = partial_data3 + ((double)(press_adc) * (double)(press_adc) * (double)(press_adc))*par_p11/2^65;

press_comp = partial_out1 + partial_out2 + partial_data4;

Integer:

//return the compensated pressure data in integer data type.For eg return if pressure is 9528709 which is 9528709/100 =

95287.09 Pascal

int64_t partial_data1

int64_t partial_data2

int64_t partial_data3

int64_t partial_data4

int64_t partial_data5

int64_t partial_data6

int64_t offset

int64_t sensitivity

int64_t press_comp

press_adc = (int64_t)(press_adc << 4);

partial_data1 = (int64_t)(t_lin *t_lin);

partial_data2 = (int64_t)(partial_data1 >>6);

partial_data3 = (int64_t)((partial_data2 * t_lin) >>8);

partial_data4 = (int64_t)((par_p4 * partial_data3) >>5);

partial_data5 = (int64_t)((par_p3 * partial_data1) <<4);

partial_data6 = (int64_t)((par_p2 * t_lin) <<22);

offset = (int64_t)((par_p1 <<47) + partial_data4 + partial_data5 + partial_data6);

partial_data2 = (int64_t)((par_p8 * partial_data3) >>5);

partial_data4 = (int64_t)((par_p7 * partial_data1) <<2);

partial_data5 = (int64_t)((par_p6 - (int32_t)16384) * t_lin <<21);

sensitivity = (int64_t)((( par_p5 - (int32_t)16384) <<46) + partial_data2 + partial_data4 +partial_data5);

partial_data1 = (int64_t)((sensitivity >>24) * press_adc);

partial_data2 = (int64_t)(par_p10 * t_lin);

partial_data3 = (int64_t)(partial_data2 + par_p9<<16);

partial_data4 = (int64_t)((partial_data3 * press_adc)>>13);

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