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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "driver/ccs811.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 CCS811::init()
{
startFirmware();
//setMode(1);
//setEnv(50, 0, 0, 0);
}
// switch to Application mode
void CCS811::startFirmware()
{
if (getStatus() & 0x10) {
txbuf[0] = 0xf4;
i2c.xmit(address, 1, txbuf, 0, rxbuf);
}
}
unsigned char CCS811::getManufacturerID()
{
txbuf[0] = 0x20;
i2c.xmit(address, 1, txbuf, 1, rxbuf);
return rxbuf[0];
}
void CCS811::setMode(unsigned char mode)
{
txbuf[0] = 0x01;
txbuf[1] = (mode & 0x07) << 4;
i2c.xmit(address, 2, txbuf, 0, rxbuf);
}
void CCS811::read()
{
txbuf[0] = 0x02;
i2c.xmit(address, 1, txbuf, 8, rxbuf);
eco2 = (rxbuf[0] << 8) + rxbuf[1];
tvoc = (rxbuf[2] << 8) + rxbuf[3];
status = rxbuf[4];
error_id = rxbuf[5];
}
void CCS811::setEnv(unsigned char humi, unsigned char humi_fraction, unsigned char temp, unsigned char temp_fraction)
{
txbuf[0] = 0x05;
txbuf[1] = humi;
txbuf[2] = humi_fraction;
txbuf[3] = temp; //((temp - 25) << 1) + (((temp - 25) & 0x80) >> 7);
txbuf[4] = temp_fraction; //(temp << 1) + ((temp & 0x80) >> 7);
i2c.xmit(address, 5, txbuf, 0, rxbuf);
}
void CCS811::setEnv(float humi, float temp)
{
setEnv(humi * 2, 0, (temp - 25) * 2, 0);
}
unsigned char CCS811::getStatus()
{
txbuf[0] = 0x00;
i2c.xmit(address, 1, txbuf, 1, rxbuf);
return rxbuf[0];
}
unsigned char CCS811::getError()
{
txbuf[0] = 0xe0;
i2c.xmit(address, 1, txbuf, 1, rxbuf);
return rxbuf[0];
}
// switch to Bootloader mode
void CCS811::reset()
{
txbuf[0] = 0xff;
txbuf[1] = 0x11;
txbuf[2] = 0xe5;
txbuf[3] = 0x72;
txbuf[4] = 0x8a;
}
CCS811 ccs811;
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