ENS210 datasheet(21/43 Pages) AMSCO

21 / 43 page

ams Datasheet

Page 21

[v1-02] 2018-Feb-19

Document Feedback

ENS210 − Functional Description

The following fragment processes the T measurement as

available in t_val. It relies on the crc7() function as shown

previously.

// Extract (and print) the fields

uint32_t t_data = (t_val>>0 ) & 0xffff;

uint32_t t_valid= (t_val>>16) & 0x1;

uint32_t t_crc = (t_val>>17) & 0x7f;

printf("ENS210: T: %06x %02x %01x %04x\n", t_val, t_crc, t_valid, t_data );

// Check the CRC

uint32_t t_payl = (t_val>>0 ) & 0x1ffff;

bool t_crc_ok= crc7(t_payl)==t_crc;

// Convert to float (and print)

float TinK = (float)t_data / 64; // Temperature in Kelvin

float TinC = TinK - 273.15;

// Temperature in Celsius

float TinF = TinC * 1.8 + 32.0; // Temperature in Fahrenheit

printf("ENS210: T: (i2c=%d crc=%d valid=%d) %5.1fK %4.1fC %4.1fF\n", i2c_ok, t_crc_ok, t_valid, TinK, TinC, TinF );

The following fragment processes the RH measurement as

available in h_val. It is similar to the t_val processing.

// Extract (and print) the fields

uint32_t h_data = (h_val>>0 ) & 0xffff;

uint32_t h_valid= (h_val>>16) & 0x1;

uint32_t h_crc = (h_val>>17) & 0x7f;

printf("ENS210: H: %06x %02x %01x %04x\n", h_val, h_crc, h_valid, h_data );

// Check the CRC

uint32_t h_payl = (h_val>>0 ) & 0x1ffff;

bool h_crc_ok= crc7(h_payl)==h_crc;

// Convert to float (and print)

float H = (float)h_data/512;

// relative humidity (in %)

printf("ENS210: H: (i2c=%d crc=%d valid=%d) %2.0f%%\n", i2c_ok, h_crc_ok, h_valid, H );

If registers 30 to 35 would contain fd 49 0b 6c 2e f5 (i.e. T_VAL

in blue and H_VAL in green) the code would print

ENS210: T: 0b49fd 05 1 49fd

ENS210: T: (i2c=1 crc=1 valid=1) 296.0K 22.8C 73.0F

ENS210: H: f52e6c 7a 1 2e6c

ENS210: H: (i2c=1 crc=1 valid=1) 23%

ENS210 Datasheet(PDF) 21 Page - ams AG

ENS210 Datasheet(HTML) 21 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Datasheet Download

Link URL