mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 18:55:13 +03:00
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/*
|
|
* geany_encoding=koi8-r
|
|
* i2c.h
|
|
*
|
|
* Copyright 2017 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
|
|
#define HTU21_ADDR (0x40 << 1)
|
|
#define HTU21_READ_TEMP (0xF3)
|
|
#define HTU21_READ_HUMID (0xF5)
|
|
#define HTU21_READ_REG (0xE7)
|
|
#define HTU21_WRITE_REG (0xE6)
|
|
#define HTU21_SOFT_RESET (0xFE)
|
|
// user reg fields
|
|
#define HTU21_REG_VBAT (0x40)
|
|
#define HTU21_REG_D1 (0x80)
|
|
#define HTU21_REG_D0 (0x01)
|
|
#define HTU21_REG_HTR (0x04)
|
|
#define HTU21_REG_ODIS (0x02)
|
|
|
|
void i2c_setup();
|
|
|
|
int16_t convert_temperature(uint16_t in);
|
|
int16_t convert_humidity(uint16_t in);
|
|
uint8_t htu_write_reg(uint8_t data);
|
|
uint8_t htu_read_reg(uint8_t *data);
|
|
uint8_t htu_read_i2c(uint16_t *data);
|
|
uint8_t htu_write_i2c(uint8_t data);
|