example_service_low_power_sensor_hibernate.c

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// Copyright (c) Acconeer AB, 2022-2024
// All rights reserved
// This file is subject to the terms and conditions defined in the file
// 'LICENSES/license_acconeer.txt', (BSD 3-Clause License) which is part
// of this source code package.
 
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
 
#include "acc_config.h"
#include "acc_definitions_a121.h"
#include "acc_definitions_common.h"
#include "acc_hal_definitions_a121.h"
#include "acc_hal_integration_a121.h"
#include "acc_integration.h"
#include "acc_processing.h"
#include "acc_rss_a121.h"
#include "acc_sensor.h"
 
#include "acc_version.h"
 
/** \example example_service_low_power_sensor_hibernate.c
 * @brief This is an example on how to put the sensor in hibernation and the system in a low power state between measurements
 * @n
 * The example executes as follows:
 *   - Create a configuration
 *   - Create a processing instance using the previously created configuration
 *   - Create a sensor instance
 *   - Enable sensor
 *   - Prepare a sensor
 *   - Enter hibernation
 *   - Loop forever:
 *     - Exit hibernation
 *     - Perform a sensor measurement and read out the data
 *     - Enter hibernation
 *     - Process the measurement
 *     - Put the system in deep sleep for a specified amount of time
 *   - Destroy the sensor instance
 *   - Destroy the processing instance
 *   - Destroy the configuration
 */
 
#define SENSOR_ID          (1U)
#define SENSOR_TIMEOUT_MS  (1000U)
#define MAX_DATA_ENTRY_LEN 15 // "-32000+-32000i" + zero termination
 
#define SUSPEND_TIME_BETWEEN_UPDATES_MS (10000) // 0.1Hz
 
static void set_config(acc_config_t *config);
 
static void print_data(acc_int16_complex_t *data, uint16_t data_length);
 
static void cleanup(acc_config_t *config, acc_processing_t *processing, acc_sensor_t *sensor, void *buffer);
 
int acconeer_main(int argc, char *argv[]);
 
int acconeer_main(int argc, char *argv[])
{
        (void)argc;
        (void)argv;
        acc_config_t             *config      = NULL;
        acc_processing_t         *processing  = NULL;
        acc_sensor_t             *sensor      = NULL;
        void                     *buffer      = NULL;
        uint32_t                  buffer_size = 0;
        acc_processing_metadata_t proc_meta;
        acc_processing_result_t   proc_result;
 
        printf("Acconeer software version %s\n", acc_version_get());
 
        const acc_hal_a121_t *hal = acc_hal_rss_integration_get_implementation();
        acc_integration_set_periodic_wakeup(SUSPEND_TIME_BETWEEN_UPDATES_MS);
 
        if (!acc_rss_hal_register(hal))
        {
                return EXIT_FAILURE;
        }
 
        config = acc_config_create();
        if (config == NULL)
        {
                printf("acc_config_create() failed\n");
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        set_config(config);
 
        processing = acc_processing_create(config, &proc_meta);
        if (processing == NULL)
        {
                printf("acc_processing_create() failed\n");
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        if (!acc_rss_get_buffer_size(config, &buffer_size))
        {
                printf("acc_rss_get_buffer_size() failed\n");
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        buffer = acc_integration_mem_alloc(buffer_size);
        if (buffer == NULL)
        {
                printf("buffer allocation failed\n");
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        acc_hal_integration_sensor_supply_on(SENSOR_ID);
        acc_hal_integration_sensor_enable(SENSOR_ID);
 
        sensor = acc_sensor_create(SENSOR_ID);
        if (sensor == NULL)
        {
                printf("acc_sensor_create() failed\n");
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        bool             status;
        bool             cal_complete = false;
        acc_cal_result_t cal_result;
 
        do
        {
                status = acc_sensor_calibrate(sensor, &cal_complete, &cal_result, buffer, buffer_size);
 
                if (status && !cal_complete)
                {
                        status = acc_hal_integration_wait_for_sensor_interrupt(SENSOR_ID, SENSOR_TIMEOUT_MS);
                }
        } while (status && !cal_complete);
 
        if (!status)
        {
                printf("acc_sensor_calibrate() failed\n");
                acc_sensor_status(sensor);
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        // Reset sensor after calibration by disabling it
        acc_hal_integration_sensor_disable(SENSOR_ID);
 
        acc_hal_integration_sensor_enable(SENSOR_ID);
 
        if (!acc_sensor_prepare(sensor, config, &cal_result, buffer, buffer_size))
        {
                printf("acc_sensor_prepare() failed\n");
                acc_sensor_status(sensor);
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        if (!acc_sensor_hibernate_on(sensor))
        {
                printf("acc_sensor_hibernate_on failed\n");
                acc_sensor_status(sensor);
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        acc_hal_integration_sensor_disable(SENSOR_ID);
 
        while (true)
        {
                acc_hal_integration_sensor_enable(SENSOR_ID);
                if (!acc_sensor_hibernate_off(sensor))
                {
                        printf("acc_sensor_hibernate_off failed\n");
                        acc_sensor_status(sensor);
                        cleanup(config, processing, sensor, buffer);
                        return EXIT_FAILURE;
                }
 
                if (!acc_sensor_measure(sensor))
                {
                        printf("acc_sensor_measure failed\n");
                        acc_sensor_status(sensor);
                        cleanup(config, processing, sensor, buffer);
                        return EXIT_FAILURE;
                }
 
                if (!acc_hal_integration_wait_for_sensor_interrupt(SENSOR_ID, SENSOR_TIMEOUT_MS))
                {
                        printf("Sensor interrupt timeout\n");
                        acc_sensor_status(sensor);
                        cleanup(config, processing, sensor, buffer);
                        return EXIT_FAILURE;
                }
 
                if (!acc_sensor_read(sensor, buffer, buffer_size))
                {
                        printf("acc_sensor_read failed\n");
                        acc_sensor_status(sensor);
                        cleanup(config, processing, sensor, buffer);
                        return EXIT_FAILURE;
                }
 
                if (!acc_sensor_hibernate_on(sensor))
                {
                        printf("acc_sensor_hibernate_on failed\n");
                        acc_sensor_status(sensor);
                        cleanup(config, processing, sensor, buffer);
                        return EXIT_FAILURE;
                }
 
                acc_hal_integration_sensor_disable(SENSOR_ID);
 
                acc_processing_execute(processing, buffer, &proc_result);
 
                print_data(proc_result.frame, proc_meta.frame_data_length);
 
                acc_integration_sleep_until_periodic_wakeup();
        }
 
        acc_hal_integration_sensor_enable(SENSOR_ID);
        if (!acc_sensor_hibernate_off(sensor))
        {
                printf("acc_sensor_hibernate_off failed\n");
                acc_sensor_status(sensor);
                cleanup(config, processing, sensor, buffer);
                return EXIT_FAILURE;
        }
 
        cleanup(config, processing, sensor, buffer);
 
        printf("Application finished OK\n");
 
        return EXIT_SUCCESS;
}
 
static void cleanup(acc_config_t *config, acc_processing_t *processing, acc_sensor_t *sensor, void *buffer)
{
        acc_hal_integration_sensor_disable(SENSOR_ID);
        acc_hal_integration_sensor_supply_off(SENSOR_ID);
 
        if (sensor != NULL)
        {
                acc_sensor_destroy(sensor);
        }
 
        if (processing != NULL)
        {
                acc_processing_destroy(processing);
        }
 
        if (config != NULL)
        {
                acc_config_destroy(config);
        }
 
        if (buffer != NULL)
        {
                acc_integration_mem_free(buffer);
        }
}
 
static void print_data(acc_int16_complex_t *data, uint16_t data_length)
{
        printf("Processed data:\n");
        char buffer[MAX_DATA_ENTRY_LEN];
 
        for (uint16_t i = 0; i < data_length; i++)
        {
                if ((i > 0) && ((i % 8) == 0))
                {
                        printf("\n");
                }
 
                snprintf(buffer, sizeof(buffer), "%" PRIi16 "+%" PRIi16 "i", data[i].real, data[i].imag);
 
                printf("%14s ", buffer);
        }
 
        printf("\n");
}
 
static void set_config(acc_config_t *config)
{
        // Add configuration of the sensor here
 
        acc_config_start_point_set(config, 80);
        acc_config_num_points_set(config, 160);
}