From b78f595070a41037a7df04e103a959b6ad68a7bd Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 2 Jan 2022 18:07:49 +0100
Subject: bme680-max44009-logger: add POSIX variant with BSEC support

---
 src/app/bme680-max44009-logger/generic.cc | 161 ++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 src/app/bme680-max44009-logger/generic.cc

(limited to 'src/app/bme680-max44009-logger/generic.cc')

diff --git a/src/app/bme680-max44009-logger/generic.cc b/src/app/bme680-max44009-logger/generic.cc
new file mode 100644
index 0000000..34f785d
--- /dev/null
+++ b/src/app/bme680-max44009-logger/generic.cc
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2022 Daniel Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include "arch.h"
+#include "driver/gpio.h"
+#include "driver/stdout.h"
+#if defined(CONFIG_meta_driver_hardware_i2c)
+#include "driver/i2c.h"
+#else
+#include "driver/soft_i2c.h"
+#endif
+#include "driver/bme680.h"
+#include "driver/bme680_util.h"
+#include "driver/max44009.h"
+
+#ifdef MULTIPASS_ARCH_arduino_nano
+#define POWER_PIN GPIO::pc3
+#endif
+
+struct bme680_field_data data;
+float lux;
+int8_t bme680_status;
+
+static void bme680_init(void)
+{
+	bme680_status = bme680.init();
+	kout << "# BME680 init returned " << bme680_status << endl;
+
+	bme680.power_mode = BME680_FORCED_MODE;
+	bme680.tph_sett.os_hum = BME680_OS_2X;
+	bme680.tph_sett.os_pres = BME680_OS_16X;
+	bme680.tph_sett.os_temp = BME680_OS_2X;
+
+	bme680.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
+	bme680.gas_sett.heatr_dur = 100;
+	bme680.gas_sett.heatr_temp = 300;
+	bme680.setSensorSettings(BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL | BME680_GAS_SENSOR_SEL);
+}
+
+void loop(void)
+{
+	static unsigned char i = 0;
+
+	if (lux >= 0 && bme680_status == 0) {
+		gpio.led_off(0);
+	} else {
+		gpio.led_on(0);
+	}
+
+#ifdef POWER_PIN
+	if (lux < 0 || bme680_status != 0) {
+		if (i == 17) {
+			kout << "# Cycling power to I2C clients" << endl;
+			gpio.write(POWER_PIN, 0);
+		} else if (i == 18) {
+			gpio.write(POWER_PIN, 1);
+		} else if (i == 19) {
+			bme680_init();
+		}
+	}
+#endif
+
+#ifdef MULTIPASS_ARCH_arduino_nano
+	if ((i == 1) && (ADCSRA & _BV(ADIF))) {
+		uint8_t adcr_l = ADCL;
+		uint8_t adcr_h = ADCH;
+		uint16_t adcr = adcr_l + (adcr_h << 8);
+		uint16_t vcc = 1100L * 1023 / adcr;
+
+		TIFR1 |= _BV(TOV1);
+		ADCSRA |= _BV(ADIF);
+
+		kout << "VCC: " << vcc << endl;
+	}
+#endif
+
+	if (i == 0) {
+		lux = max44009.getLux();
+		if (lux >= 0) {
+			kout << "MAX44009: ";
+			kout.printf_float(max44009.getLux());
+			kout << " lx" << endl;
+		} else {
+			kout << "# MAX44009 error" << endl;
+		}
+	}
+
+	if (i == 1 && bme680_status == 0) {
+		bme680_status = bme680.setSensorMode();
+	}
+	else if (i == 2) {
+		if (bme680_status == 0) {
+			bme680_status = bme680.getSensorData(&data);
+		}
+		if (bme680_status == 0) {
+			bme680.amb_temp = data.temperature;
+			kout << "BME680 temperature: " << data.temperature << " degC" << endl;
+			kout << "BME680 humidity: " << data.humidity  << " %" << endl;
+			kout << "BME680 pressure: " << data.pressure / 100 << " hPa" << endl;
+			kout << "BME680 gas resistance: " << data.gas_resistance << endl;
+		} else {
+			kout << "# BME680 error " << bme680_status << endl;
+		}
+	}
+
+	i = (i + 1) % 20;
+}
+
+int main(void)
+{
+	arch.setup();
+	gpio.setup();
+	kout.setup();
+
+#ifdef POWER_PIN
+	gpio.output(POWER_PIN);
+	gpio.write(POWER_PIN, 1);
+#endif
+
+#ifdef MULTIPASS_ARCH_arduino_nano
+
+	kout << "# Reset reason: " << MCUSR << endl;
+	MCUSR = 0;
+
+	/* watchdog reset after ~4 seconds */
+	asm("wdr");
+	WDTCSR = _BV(WDCE) | _BV(WDE);
+	WDTCSR = _BV(WDE) | _BV(WDP3);
+
+	// One ADC conversion per four seconds
+	TCCR0A = 0;
+	TCCR0B = _BV(CS12) | _BV(CS10);
+
+	// Measure internal 1.1V bandgap using VCC as reference on each Timer 0 overflow
+	ADMUX = _BV(REFS0) | 0x0e;
+	ADCSRB = _BV(ADTS2);
+	ADCSRA = _BV(ADEN) | _BV(ADATE) | _BV(ADPS2) | _BV(ADPS1);
+#endif
+
+	while (i2c.setup() != 0) {
+		kout << "# I2C setup failed" << endl;
+		arch.delay_ms(100);
+	}
+
+	kout << "# I2C setup OK" << endl;
+
+	bme680.intf = BME680_I2C_INTF;
+	bme680.read = bme680_i2c_read;
+	bme680.write = bme680_i2c_write;
+	bme680.delay_ms = bme680_delay_ms;
+
+	bme680.amb_temp = 25;
+
+	bme680_init();
+
+	arch.idle_loop();
+
+	return 0;
+}
-- 
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