path: root/gnss/src/main.c

#if 1
/*
 * Copyright (c) 2024 Conexio Technologies, Inc
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

#include <stdio.h>
#include <zephyr/kernel.h>

#include <zephyr/logging/log.h>
#include <modem/nrf_modem_lib.h>
#include <modem/lte_lc.h>
#include <dk_buttons_and_leds.h>

/* Include the header file for the GNSS interface */
#include <nrf_modem_gnss.h>

/* Define the PVT data frame variable */
static struct nrf_modem_gnss_pvt_data_frame pvt_data;

/* Declare helper variables to find the TTFF */
static int64_t gnss_start_time;
static bool first_fix = false;

static K_SEM_DEFINE(lte_connected, 0, 1);

LOG_MODULE_REGISTER(GNSS_sample, LOG_LEVEL_INF);


static int modem_configure(void)
{
	int err;

	LOG_INF("Initializing modem library");

	err = nrf_modem_lib_init();
	if (err) {
		LOG_ERR("Failed to initialize the modem library, error: %d", err);
		return err;
	}

	err = lte_lc_init();
	if (err) {
		LOG_ERR("Failed to initialize LTE Link Controller, error: %d", err);
		return err;
	}

	return 0;
}

/* Define a function to log fix data in a readable format */
static void print_fix_data(struct nrf_modem_gnss_pvt_data_frame *pvt_data)
{
	LOG_INF("Latitude:       %.06f", pvt_data->latitude);
	LOG_INF("Longitude:      %.06f", pvt_data->longitude);
	LOG_INF("Altitude:       %.01f m", pvt_data->altitude);
	LOG_INF("Time (UTC):     %02u:%02u:%02u.%03u",
	       pvt_data->datetime.hour,
	       pvt_data->datetime.minute,
	       pvt_data->datetime.seconds,
	       pvt_data->datetime.ms);
}


static void gnss_event_handler(int event)
{
	int err;

	switch (event) {
	/* On a PVT event, confirm if PVT data is a valid fix */
	case NRF_MODEM_GNSS_EVT_PVT:
		LOG_INF("Searching...");
		/* Print satellite information */
		int num_satellites = 0;
		for (int i = 0; i < 12 ; i++) {
			if (pvt_data.sv[i].signal != 0) {
				LOG_INF("sv: %d, cn0: %d", pvt_data.sv[i].sv, pvt_data.sv[i].cn0);
				num_satellites++;
			}
		}
		LOG_INF("Number of current satellites: %d", num_satellites);
		err = nrf_modem_gnss_read(&pvt_data, sizeof(pvt_data), NRF_MODEM_GNSS_DATA_PVT);
		if (err) {
			LOG_ERR("nrf_modem_gnss_read failed, err %d", err);
			return;
		}
		if (pvt_data.flags & NRF_MODEM_GNSS_PVT_FLAG_FIX_VALID) {
			dk_set_led_on(DK_LED1);
			print_fix_data(&pvt_data);
			/* Print the time to first fix */
			if (!first_fix) {
				LOG_INF("Time to first fix: %2.1lld s", (k_uptime_get() - gnss_start_time)/1000);
				first_fix = true;
			}
			return;
		}
		break;
	/* Log when the GNSS sleeps and wakes up */
	case NRF_MODEM_GNSS_EVT_PERIODIC_WAKEUP:
		LOG_INF("GNSS has woken up");
		break;
	case NRF_MODEM_GNSS_EVT_SLEEP_AFTER_FIX:
		LOG_INF("GNSS enter sleep after fix");
		break;
	default:
		break;
	}
}

int main(void)
{
	int err;
	
	LOG_INF("Stratus GNSS sample started");

	if (dk_leds_init() != 0) {
		LOG_ERR("Failed to initialize the LEDs Library");
	}

	err = modem_configure();
	if (err) {
		LOG_ERR("Failed to configure the modem");
		return 0;
	}

	/* Activate only the GNSS stack */
	if (lte_lc_func_mode_set(LTE_LC_FUNC_MODE_ACTIVATE_GNSS) != 0) {
		LOG_ERR("Failed to activate GNSS functional mode");
		return 0;
	}

	/* Register the GNSS event handler */
	if (nrf_modem_gnss_event_handler_set(gnss_event_handler) != 0) {
		LOG_ERR("Failed to set GNSS event handler");
		return 0;
	}

	/* Set the GNSS fix interval and GNSS fix retry period */
	if (nrf_modem_gnss_fix_interval_set(CONFIG_GNSS_PERIODIC_INTERVAL) != 0) {
		LOG_ERR("Failed to set GNSS fix interval");
		return 0;
	}

	if (nrf_modem_gnss_fix_retry_set(CONFIG_GNSS_PERIODIC_TIMEOUT) != 0) {
		LOG_ERR("Failed to set GNSS fix retry");
		return 0;
	}

	/* Start the GNSS receiver */
	LOG_INF("Starting GNSS");
	if (nrf_modem_gnss_start() != 0) {
		LOG_ERR("Failed to start GNSS");
		return 0;
	}

	/* Log the current system uptime */
	gnss_start_time = k_uptime_get();

	return 0;
}
#elif 0
/*																								*/
/* Copyright (c) 2020 Nordic Semiconductor ASA													*/
/*																								*/
/* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause											*/
#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
#include <zephyr/drivers/i2c.h>

/* STEP 8 - Define the addresses of relevant registers */
#define CTRLMEAS 0xF4
#define CALIB00	 0x88
#define ID	 0xD0
#define TEMPMSB	 0xFA

#define CHIP_ID  0x61
#define SENSOR_CONFIG_VALUE 0x93

/* STEP 6 - Get the node identifier of the sensor */
#define I2C_NODE DT_NODELABEL(mysensor)

/* Data structure to store BME280 data */
struct bme280_data {
	/* Compensation parameters */
	uint16_t dig_t1;
	int16_t dig_t2;
	int16_t dig_t3;
} bmedata;

/* Read sensor calibration data and stores these into sensor data */
void bme_calibrationdata(const struct i2c_dt_spec *spec, struct bme280_data *sensor_data_ptr)
{
	
	/* Step 10 - Put calibration function code */
	uint8_t values[6];

	int ret = i2c_burst_read_dt(spec, CALIB00, values, 6);

	if (ret != 0) {
		printk("Failed to read register %x \n", CALIB00);
		return;
	}

	sensor_data_ptr->dig_t1 = ((uint16_t)values[1]) << 8 | values[0];
	sensor_data_ptr->dig_t2 = ((uint16_t)values[3]) << 8 | values[2];
	sensor_data_ptr->dig_t3 = ((uint16_t)values[5]) << 8 | values[4];
}

/* Compensate current temperature using previously stored sensor calibration data */
static int32_t bme280_compensate_temp(struct bme280_data *data, int32_t adc_temp)
{
	int32_t var1, var2;

	var1 = (((adc_temp >> 3) - ((int32_t)data->dig_t1 << 1)) * ((int32_t)data->dig_t2)) >> 11;

	var2 = (((((adc_temp >> 4) - ((int32_t)data->dig_t1)) *
		  ((adc_temp >> 4) - ((int32_t)data->dig_t1))) >>
		 12) *
		((int32_t)data->dig_t3)) >>
	       14;

	return ((var1 + var2) * 5 + 128) >> 8;
}

int main(void)
{

	/* STEP 7 - Retrieve the API-specific device structure and make sure that the device is
	 * ready to use  */
	static const struct i2c_dt_spec dev_i2c = I2C_DT_SPEC_GET(I2C_NODE);

	if (!device_is_ready(dev_i2c.bus)) {
		printk("I2C bus %s is not ready!\n", dev_i2c.bus->name);
		return -1;
	}

	/* STEP 9 - Verify it is proper device by reading device id  */
	uint8_t id = 0;
	uint8_t regs[] = {ID};

	int ret = i2c_write_read_dt(&dev_i2c, regs, 1, &id, 1);

	if (ret != 0) {
		printk("Failed to read register %x \n", regs[0]);
		return -1;
	}

	if (id != CHIP_ID) {
		printk("Invalid chip id! %x \n", id);
		return -1;
	}

	bme_calibrationdata(&dev_i2c, &bmedata);

	/* STEP 11 - Setup the sensor by writing the value 0x93 to the Configuration register */
	uint8_t sensor_config[] = {CTRLMEAS, SENSOR_CONFIG_VALUE};

	ret = i2c_write_dt(&dev_i2c, sensor_config, 2);

	if (ret != 0) {
		printk("Failed to write register %x \n", sensor_config[0]);
		return -1;
	}

	while (1) {

		/* STEP 12 - Read the temperature from the sensor */
		uint8_t temp_val[3] = {0};

		int ret = i2c_burst_read_dt(&dev_i2c, TEMPMSB, temp_val, 3);

		if (ret != 0) {
			printk("Failed to read register %x \n", TEMPMSB);
			k_msleep(1000);
			continue;
		}

		/* STEP 12.1 - Put the data read from registers into actual order (see datasheet) */
		int32_t adc_temp =
			(temp_val[0] << 12) | (temp_val[1] << 4) | ((temp_val[2] >> 4) & 0x0F);

		/* STEP 12.2 - Compensate temperature */
		int32_t comp_temp = bme280_compensate_temp(&bmedata, adc_temp);

		/* STEP 12.3 - Convert temperature */
		float temperature = (float)comp_temp / 100.0f;
		double fTemp = (double)temperature * 1.8 + 32;

		// Print reading to console
		printk("Temperature in Celsius : %8.2f C\n", (double)temperature);
		printk("Temperature in Fahrenheit : %.2f F\n", fTemp);

		k_msleep(1000);
	}
}
#else

/*
 * Copyright (c) 2018 Bosch Sensortec GmbH
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 #include <zephyr/kernel.h>
 #include <zephyr/device.h>
 #include <zephyr/drivers/sensor.h>
 #include <stdio.h>
 
 int main(void)
 {
	 const struct device *const dev = DEVICE_DT_GET_ONE(bosch_bme680);
	 struct sensor_value temp, press, humidity, gas_res;
 
	 if (!device_is_ready(dev)) {
		 printk("sensor: device not ready.\n");
		 return 0;
	 }
 
	 printf("Device %p name is %s\n", dev, dev->name);
 
 #ifndef CONFIG_COVERAGE
	 while (1) {
 #else
	 for (int i = 0; i < 5; i++) {
 #endif
		 k_sleep(K_MSEC(3000));
 
		 sensor_sample_fetch(dev);
		 sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
		 sensor_channel_get(dev, SENSOR_CHAN_PRESS, &press);
		 sensor_channel_get(dev, SENSOR_CHAN_HUMIDITY, &humidity);
		 sensor_channel_get(dev, SENSOR_CHAN_GAS_RES, &gas_res);
 
		 printf("Temp: %d.%02d degC; Press: %d.%02d kPa; RH: %d.%02d %%; G: %d.%02d Ohm\n",
				 temp.val1, temp.val2, press.val1, press.val2,
				 humidity.val1, humidity.val2, gas_res.val1,
				 gas_res.val2);
	 }
	 return 0;
 }


#endif