56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* Copyright 2018 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "mgos.h"
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#include "mgos_i2c.h"
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#include "mgos_si7021.h"
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#include <math.h>
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#define MGOS_SI7021_DEFAULT_I2CADDR (0x40)
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#define MGOS_SI7021_MEASRH_HOLD_CMD (0xE5)
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#define MGOS_SI7021_MEASRH_NOHOLD_CMD (0xF5)
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#define MGOS_SI7021_MEASTEMP_HOLD_CMD (0xE3)
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#define MGOS_SI7021_MEASTEMP_NOHOLD_CMD (0xF3)
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#define MGOS_SI7021_READPREVTEMP_CMD (0xE0)
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#define MGOS_SI7021_RESET_CMD (0xFE)
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#define MGOS_SI7021_WRITERHT_REG_CMD (0xE6)
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#define MGOS_SI7021_READRHT_REG_CMD (0xE7)
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#define MGOS_SI7021_WRITEHEATER_REG_CMD (0x51)
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#define MGOS_SI7021_READHEATER_REG_CMD (0x11)
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#define MGOS_SI7021_ID1_CMD (0xFA0F)
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#define MGOS_SI7021_ID2_CMD (0xFCC9)
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#define MGOS_SI7021_FIRMVERS_CMD (0x84B8)
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct mgos_si7021
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{
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struct mgos_i2c *i2c;
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uint8_t i2caddr;
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double last_read_time;
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float humidity, temperature;
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};
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#ifdef __cplusplus
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}
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#endif
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