diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/app/datalogger/main.cc | 18 | ||||
| -rw-r--r-- | src/driver/scd4x.cc | 40 |
2 files changed, 58 insertions, 0 deletions
diff --git a/src/app/datalogger/main.cc b/src/app/datalogger/main.cc index 8740035..46ff6b0 100644 --- a/src/app/datalogger/main.cc +++ b/src/app/datalogger/main.cc @@ -45,6 +45,9 @@ #ifdef DRIVER_TSL2591 #include "driver/tsl2591.h" #endif +#ifdef DRIVER_SCD4X +#include "driver/scd4x.h" +#endif void loop(void) { @@ -136,6 +139,17 @@ void loop(void) kout << dec << "TSL2591 CH0: " << tsl2591.ch0 << " / CH1: " << tsl2591.ch1; kout << hex << " (status: 0x" << tsl2591.getStatus() << ")" << endl; #endif + +#ifdef DRIVER_SCD4X + scd4x.read(); + kout << dec << "CO₂: " << scd4x.co2 << " ppm" << endl; + kout << "Temperature: "; + kout.printf_float(((175.0 * scd4x.rawTemperature) / 65536) - 45); + kout << " °c" << endl; + kout << "Humidity: "; + kout.printf_float((100.0 * scd4x.rawHumidity) / 65536); + kout << " %" << endl; +#endif } int main(void) @@ -224,6 +238,10 @@ int main(void) tsl2591.init(); #endif +#ifdef DRIVER_SCD4X + scd4x.start(); +#endif + arch.idle_loop(); return 0; diff --git a/src/driver/scd4x.cc b/src/driver/scd4x.cc new file mode 100644 index 0000000..c0901e8 --- /dev/null +++ b/src/driver/scd4x.cc @@ -0,0 +1,40 @@ +/* + * Copyright 2021 Daniel Friesel + * + * SPDX-License-Identifier: BSD-2-Clause + */ +#include "driver/scd4x.h" +#include "driver/gpio.h" +#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(DRIVER_SOFTI2C) +#include "driver/i2c.h" +#else +#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::read() +{ + txbuf[0] = 0xec; + txbuf[1] = 0x05; + + if (i2c.xmit(address, 1, txbuf, 9, rxbuf) == 0) { + co2 = (rxbuf[0] << 8) + rxbuf[1]; + rawTemperature = ((rxbuf[3] << 8) + rxbuf[4]); + rawHumidity = (rxbuf[6] << 8) + rxbuf[7]; + } +} + +SCD4x scd4x; |