| commit | author | age | ||
| e30a4c | 1 | /********************************************************************************* |
| GW | 2 | * Copyright: (C) 2018 LingYun IoT System Studio |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Filename: sht20.c | |
| 6 | * Description: This file is temperature and relative humidity sensor SHT20 code | |
| 7 | * | |
| 8 | * Version: 1.0.0(2018/10/14) | |
| 9 | * Author: Guo Wenxue <guowenxue@gmail.com> | |
| 10 | * ChangeLog: 1, Release initial version on "2018/10/14 12:13:26" | |
| 11 | * | |
| 12 | ********************************************************************************/ | |
| 13 | #ifndef __SHT20_H | |
| 14 | #define __SHT20_H | |
| 15 | ||
| 16 | #include <stdio.h> | |
| 17 | #include <stdint.h> | |
| 18 | #include <time.h> | |
| 19 | ||
| 20 | #define SOFTRESET 0xFE | |
| 21 | #define TRIGGER_TEMPERATURE_NO_HOLD 0xF3 | |
| 22 | #define TRIGGER_HUMIDITY_NO_HOLD 0xF5 | |
| 23 | ||
| 24 | //#define I2C_API_IOCTL /* Use I2C userspace driver ioctl API */ | |
| 25 | #define I2C_API_RDWR /* Use I2C userspace driver read/write API */ | |
| 26 | ||
| 27 | int sht2x_init(void); | |
| 28 | int sht2x_get_serialnumber(uint8_t *serialnumber, int size); | |
| 29 | int sht2x_get_temp_humidity(float *temp, float *rh); | |
| 30 | void sht2x_term(void); | |
| 31 | ||
| 32 | #endif | |
| 33 | ||
