38 lines
1.6 KiB
C
38 lines
1.6 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2020 Laird Connectivity
|
||
|
|
* Copyright (c) 2019 Electronut Labs
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _SI7055_H
|
||
|
|
#define _SI7055_H
|
||
|
|
|
||
|
|
/* Si7055 register addresses */
|
||
|
|
#define SI7055_MEAS_TEMP_MASTER_MODE 0xE3
|
||
|
|
#define SI7055_MEAS_TEMP_NO_MASTER_MODE 0xF3
|
||
|
|
#define SI7055_RESET 0xFE
|
||
|
|
#define SI7055_READ_ID_LOW_0 0xFA
|
||
|
|
#define SI7055_READ_ID_LOW_1 0x0F
|
||
|
|
#define SI7055_READ_ID_HIGH_0 0xFC
|
||
|
|
#define SI7055_READ_ID_HIGH_1 0xC9
|
||
|
|
#define SI7055_FIRMWARE_0 0x84
|
||
|
|
#define SI7055_FIRMWARE_1 0xB8
|
||
|
|
/* Si7055 temperature conversion factors and constants */
|
||
|
|
#define SI7055_CONV_FACTOR_1 17572
|
||
|
|
#define SI7055_CONV_FACTOR_2 4685
|
||
|
|
#define SI7055_MULTIPLIER 10000
|
||
|
|
#define SI7055_DIVIDER 1000000
|
||
|
|
/* Si7055 buffer sizes and locations */
|
||
|
|
#define SI7055_TEMPERATURE_READ_NO_CHECKSUM_SIZE 0x02
|
||
|
|
#define SI7055_TEMPERATURE_READ_WITH_CHECKSUM_SIZE 0x03
|
||
|
|
#define SI7055_TEMPERATURE_DATA_BYTE_0 0x0
|
||
|
|
#define SI7055_TEMPERATURE_DATA_BYTE_1 0x1
|
||
|
|
/* Si7055 Checksum constants */
|
||
|
|
#define SI7055_CRC_POLY 0x31
|
||
|
|
#define SI7055_CRC_SIZE sizeof(uint8_t)
|
||
|
|
#define SI7055_CRC_INIT 0x0
|
||
|
|
#define SI7055_DATA_SIZE (sizeof(uint8_t) * 2)
|
||
|
|
|
||
|
|
#endif /* _SI7055_H */
|