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/*
* Copyright 2021 Birte Kristina Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "driver/scd4x.h"
#include "driver/gpio.h"
#if defined(CONFIG_meta_driver_hardware_i2c)
#include "driver/i2c.h"
#elif defined(CONFIG_driver_softi2c)
#include "driver/soft_i2c.h"
#endif
void SCD4x::start()
{
txbuf[0] = 0x21;
txbuf[1] = 0xb1;
i2c.xmit(address, 2, txbuf, 0, rxbuf);
}
void SCD4x::stop()
{
txbuf[0] = 0x3f;
txbuf[1] = 0x86;
i2c.xmit(address, 2, txbuf, 0, rxbuf);
}
void SCD4x::startLowPower()
{
txbuf[0] = 0x21;
txbuf[1] = 0xac;
i2c.xmit(address, 2, txbuf, 0, rxbuf);
}
bool SCD4x::read()
{
txbuf[0] = 0xec;
txbuf[1] = 0x05;
if (i2c.xmit(address, 2, txbuf, 9, rxbuf)) {
return false;
}
co2 = (rxbuf[0] << 8) + rxbuf[1];
rawTemperature = ((rxbuf[3] << 8) + rxbuf[4]);
rawHumidity = (rxbuf[6] << 8) + rxbuf[7];
return true;
}
SCD4x scd4x;
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